Linux Process & Jobs & System & Kernel

ps aux ( no hyphen)

┌─[root@nedrain]─[/usr/lib/systemd]
└──? $ps aux
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.3 125200  3760 ?        Ss   Jun16   0:07 /usr/lib/systemd/systemd --switched-roo
root         2  0.0  0.0      0     0 ?        S    Jun16   0:00 [kthreadd]
root         3  0.0  0.0      0     0 ?        S    Jun16   0:00 [ksoftirqd/0]
root         5  0.0  0.0      0     0 ?        S<   Jun16   0:00 [kworker/0:0H]
root         6  0.0  0.0      0     0 ?        S    Jun16   0:00 [kworker/u2:0]
root         7  0.0  0.0      0     0 ?        S    Jun16   0:00 [migration/0]
root         8  0.0  0.0      0     0 ?        S    Jun16   0:00 [rcu_bh]
root         9  0.0  0.0      0     0 ?        R    Jun16   0:04 [rcu_sched]
root        10  0.0  0.0      0     0 ?        S    Jun16   0:00 [watchdog/0]
root        12  0.0  0.0      0     0 ?        S    Jun16   0:00 [kdevtmpfs]
root        13  0.0  0.0      0     0 ?        S<   Jun16   0:00 [netns]
root        14  0.0  0.0      0     0 ?        S    Jun16   0:00 [khungtaskd]
root        15  0.0  0.0      0     0 ?        S<   Jun16   0:00 [writeback]
root        16  0.0  0.0      0     0 ?        S<   Jun16   0:00 [kintegrityd]
root        17  0.0  0.0      0     0 ?        S<   Jun16   0:00 [bioset]
root        18  0.0  0.0      0     0 ?        S<   Jun16   0:00 [kblockd]
root        19  0.0  0.0      0     0 ?        S<   Jun16   0:00 [md]
root        25  0.0  0.0      0     0 ?        S    Jun16   0:00 [kswapd0]
root        26  0.0  0.0      0     0 ?        SN   Jun16   0:00 [ksmd]
root        27  0.0  0.0      0     0 ?        SN   Jun16   0:00 [khugepaged]
root        28  0.0  0.0      0     0 ?        S<   Jun16   0:00 [crypto]
root        36  0.0  0.0      0     0 ?        S<   Jun16   0:00 [kthrotld]
root        37  0.0  0.0      0     0 ?        S    Jun16   0:00 [kworker/u2:1]
root        38  0.0  0.0      0     0 ?        S<   Jun16   0:00 [kmpath_rdacd]
root        39  0.0  0.0      0     0 ?        S<   Jun16   0:00 [kpsmoused]
root        40  0.0  0.0      0     0 ?        S<   Jun16   0:00 [ipv6_addrconf]
root        59  0.0  0.0      0     0 ?        S<   Jun16   0:00 [deferwq]
root       100  0.0  0.0      0     0 ?        S    Jun16   0:00 [kauditd]
root       229  0.0  0.0      0     0 ?        S<   Jun16   0:00 [ata_sff]
root       235  0.0  0.0      0     0 ?        S    Jun16   0:00 [scsi_eh_0]
root       236  0.0  0.0      0     0 ?        S<   Jun16   0:00 [scsi_tmf_0]
root       237  0.0  0.0      0     0 ?        S    Jun16   0:00 [scsi_eh_1]
root       238  0.0  0.0      0     0 ?        S<   Jun16   0:00 [scsi_tmf_1]
root       241  0.0  0.0      0     0 ?        S<   Jun16   0:00 [ttm_swap]
root       251  0.0  0.0      0     0 ?        S<   Jun16   0:00 [kworker/0:1H]
root       258  0.0  0.0      0     0 ?        S    Jun16   0:00 [jbd2/vda1-8]
root       259  0.0  0.0      0     0 ?        S<   Jun16   0:00 [ext4-rsv-conver]
root       326  0.0  0.8  36832  8040 ?        Ss   Jun16   0:00 /usr/lib/systemd/systemd-journald
root       348  0.0  0.2  44060  2060 ?        Ss   Jun16   0:00 /usr/lib/systemd/systemd-udevd
root       378  0.0  0.0  55452   888 ?        S<sl Jun16   0:00 /sbin/auditd
root       435  0.0  0.0      0     0 ?        S<   Jun16   0:00 [edac-poller]
dbus       451  0.0  0.1  24424  1696 ?        Ss   Jun16   0:00 /bin/dbus-daemon --system --address=sys
polkitd    453  0.0  1.2 534260 12240 ?        Ssl  Jun16   0:00 /usr/lib/polkit-1/polkitd --no-debug
root       455  0.0  0.5 212120  5280 ?        Ssl  Jun16   0:02 /usr/sbin/rsyslogd -n
root       458  0.0  0.1  24204  1676 ?        Ss   Jun16   0:00 /usr/lib/systemd/systemd-logind
root       465  0.0  0.1 126236  1596 ?        Ss   Jun16   0:00 /usr/sbin/crond -n
root       468  0.0  0.0  25856   932 ?        Ss   Jun16   0:00 /usr/sbin/atd -f
root       497  0.0  0.0 110044   820 tty1     Ss+  Jun16   0:00 /sbin/agetty --noclear tty1 linux
root       498  0.0  0.0 110044   840 ttyS0    Ss+  Jun16   0:00 /sbin/agetty --keep-baud 115200 38400 9
root       558  0.0  0.0      0     0 ?        S    16:20   0:00 [kworker/0:1]
root       560  0.0  0.5 145700  5312 ?        Ss   16:20   0:00 sshd: root@pts/0
root       567  0.0  0.2 115392  2096 pts/0    Ss   16:20   0:00 -bash
root       707  0.0  1.3 113372 12788 ?        Ss   Jun16   0:00 /sbin/dhclient -1 -q -lf /var/lib/dhcli
root       789  0.0  1.9 562388 18616 ?        Ssl  Jun16   0:09 /usr/bin/python -Es /usr/sbin/tuned -l
ntp        806  0.0  0.2  29900  2084 ?        Ss   Jun16   0:00 /usr/sbin/ntpd -u ntp:ntp -g
root       978  0.1  0.5  40832  5288 ?        Ssl  Jun16   6:23 /usr/sbin/aliyun-service
root     11530  0.0  0.0      0     0 ?        R    Jun16   0:05 [kworker/0:0]
root     11838  0.0  0.1 151064  1816 pts/0    R+   20:05   0:00 ps aux
root     12073  0.0  0.4  32616  4316 ?        S<sl Jun17   0:16 /usr/local/aegis/aegis_update/AliYunDun
root     12134  0.1  2.1 133456 21004 ?        S<sl Jun17   4:33 /usr/local/aegis/aegis_client/aegis_10_
root     12188  0.0  0.2 436856  2780 ?        S<l  Jun17   0:19 /usr/local/aegis/AliSecGuard/AliSecGuar
root     12871  0.0  0.4 105996  4112 ?        Ss   Jun17   0:00 /usr/sbin/sshd -D

top (You can press "M" or "P" or "N" or "T" after you entered to interact)

┌─[root@nedrain]─[/usr/lib/systemd]
└──? $top
top - 20:49:09 up 2 days,  9:57,  1 user,  load average: 0.00, 0.01, 0.05
Tasks:  62 total,   1 running,  61 sleeping,   0 stopped,   0 zombie
%Cpu(s):  0.0 us,  0.0 sy,  0.0 ni,100.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem :   965788 total,   122840 free,    83372 used,   759576 buff/cache
KiB Swap:        0 total,        0 free,        0 used.   720820 avail Mem

  PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ COMMAND
    1 root      20   0  125200   3760   2520 S  0.0  0.4   0:07.70 systemd
    2 root      20   0       0      0      0 S  0.0  0.0   0:00.00 kthreadd
    3 root      20   0       0      0      0 S  0.0  0.0   0:00.15 ksoftirqd/0
    5 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 kworker/0:0H
    6 root      20   0       0      0      0 S  0.0  0.0   0:00.35 kworker/u2:0
    7 root      rt   0       0      0      0 S  0.0  0.0   0:00.00 migration/0
    8 root      20   0       0      0      0 S  0.0  0.0   0:00.00 rcu_bh
    9 root      20   0       0      0      0 S  0.0  0.0   0:04.10 rcu_sched
   10 root      rt   0       0      0      0 S  0.0  0.0   0:00.35 watchdog/0
   12 root      20   0       0      0      0 S  0.0  0.0   0:00.00 kdevtmpfs
   13 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 netns
   14 root      20   0       0      0      0 S  0.0  0.0   0:00.01 khungtaskd
   15 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 writeback
   16 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 kintegrityd
   17 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 bioset
   18 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 kblockd
...

top -p [pid]

top -p 1
// the output is:
top - 08:54:50 up 47 min,  2 users,  load average: 0.01, 0.04, 0.05
Tasks:   1 total,   0 running,   1 sleeping,   0 stopped,   0 zombie
%Cpu(s):  0.0 us,  0.0 sy,  0.0 ni,100.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem :   995684 total,   353708 free,   201296 used,   440680 buff/cache
KiB Swap:  2097148 total,  2097148 free,        0 used.   639440 avail Mem

   PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ COMMAND
     1 root      20   0  128024   6640   4144 S  0.0  0.7   0:02.64 systemd


top -b -n 1 > /root/test.log (recode the result of top at that moment)

top -b -n 1 > /root/test.log

┌─[root@nedrain]─[~]
└──? $ll -ah
-rw-r--r--   1 root root 5.1K Jun 18 21:01 test.log

pstree ( -p : show the pid, -u : show the group)

┌─[root@nedrain]─[~]
└──? $pstree
systemd─┬─AliSecGuard───6*[{AliSecGuard}]
        ├─AliYunDun───22*[{AliYunDun}]
        ├─AliYunDunUpdate───3*[{AliYunDunUpdate}]
        ├─2*[agetty]
        ├─aliyun-service───2*[{aliyun-service}]
        ├─atd
        ├─auditd───{auditd}
        ├─crond
        ├─dbus-daemon
        ├─dhclient
        ├─ntpd
        ├─polkitd───5*[{polkitd}]
        ├─rsyslogd───2*[{rsyslogd}]
        ├─sshd───sshd───bash───pstree
        ├─systemd-journal
        ├─systemd-logind
        ├─systemd-udevd
        └─tuned───4*[{tuned}]

pstree -p

┌─[root@nedrain]─[~]
└──? $pstree -p
systemd(1)─┬─AliSecGuard(12188)─┬─{AliSecGuard}(12189)
           │                    ├─{AliSecGuard}(12190)
           │                    ├─{AliSecGuard}(12191)
           │                    ├─{AliSecGuard}(12192)
           │                    ├─{AliSecGuard}(12194)
           │                    └─{AliSecGuard}(12196)
           ├─AliYunDun(12134)─┬─{AliYunDun}(12135)
           │                  ├─{AliYunDun}(12136)
           │                  ├─{AliYunDun}(12147)
           │                  ├─{AliYunDun}(12148)
           │                  ├─{AliYunDun}(12149)
           │                  ├─{AliYunDun}(12150)
           │                  ├─{AliYunDun}(12151)
           │                  ├─{AliYunDun}(12152)
           │                  ├─{AliYunDun}(12153)
           │                  ├─{AliYunDun}(12154)
           │                  ├─{AliYunDun}(12155)
           │                  ├─{AliYunDun}(12156)
           │                  ├─{AliYunDun}(12157)
           │                  ├─{AliYunDun}(12158)
           │                  ├─{AliYunDun}(12159)
           │                  ├─{AliYunDun}(12160)
           │                  ├─{AliYunDun}(12161)
           │                  ├─{AliYunDun}(12162)
           │                  ├─{AliYunDun}(12163)
           │                  ├─{AliYunDun}(12164)
           │                  ├─{AliYunDun}(12165)
           │                  └─{AliYunDun}(12166)
           ├─AliYunDunUpdate(12073)─┬─{AliYunDunUpdate}(12075)
           │                        ├─{AliYunDunUpdate}(12076)
           │                        └─{AliYunDunUpdate}(12077)
           ├─agetty(497)
           ├─agetty(498)
           ├─aliyun-service(978)─┬─{aliyun-service}(980)
           │                     └─{aliyun-service}(981)
           ├─atd(468)
           ├─auditd(378)───{auditd}(379)
           ├─crond(465)
           ├─dbus-daemon(451)
           ├─dhclient(707)
           ├─ntpd(806)
           ├─polkitd(453)─┬─{polkitd}(480)
           │              ├─{polkitd}(481)
           │              ├─{polkitd}(483)
           │              ├─{polkitd}(488)
           │              └─{polkitd}(490)
           ├─rsyslogd(455)─┬─{rsyslogd}(471)
           │               └─{rsyslogd}(475)
           ├─sshd(12871)───sshd(560)───bash(567)───pstree(14892)
           ├─systemd-journal(326)
           ├─systemd-logind(458)
           ├─systemd-udevd(348)
           └─tuned(789)─┬─{tuned}(935)
                        ├─{tuned}(936)
                        ├─{tuned}(937)
                        └─{tuned}(938)

pstree -u

┌─[root@nedrain]─[~]
└──? $pstree -u
systemd─┬─AliSecGuard───6*[{AliSecGuard}]
        ├─AliYunDun───22*[{AliYunDun}]
        ├─AliYunDunUpdate───3*[{AliYunDunUpdate}]
        ├─2*[agetty]
        ├─aliyun-service───2*[{aliyun-service}]
        ├─atd
        ├─auditd───{auditd}
        ├─crond
        ├─dbus-daemon(dbus)
        ├─dhclient
        ├─ntpd(ntp)
        ├─polkitd(polkitd)───5*[{polkitd}]
        ├─rsyslogd───2*[{rsyslogd}]
        ├─sshd───sshd───bash───pstree
        ├─systemd-journal
        ├─systemd-logind
        ├─systemd-udevd
        └─tuned───4*[{tuned}]

kill [Signal] PID (Signal : 1 for reboot, 9 for force kil)

// Haven‘t done the experiment

killall [Signal][the NAME of a process, NOT PID] (

killall  9 httpd // it will kill all httpd processes

pkill -9 -t [terminal name] (kill a terminal)

// first use "w"
┌─[root@192]─[~]
└──? $w
 09:25:53 up  1:18,  2 users,  load average: 0.05, 0.04, 0.05
USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHAT
root     tty1                      Wed12   44:49   0.49s  0.49s -bash
root     pts/0    192.168.5.13     08:42    1.00s  0.05s  0.01s w
// you can see the line "what" is "w" is your terminal "pts/0", you can kill "tty1" by "pkill -9 -t tty1"
pkill -9 -t tty1

Jobs ( some processes running undergroud)

way 1 , append "&" at a command

// tar -zcf etc.tar.gz  /etc  &
┌─[root@192]─[~]
└──? $tar -zcf etc.tar.gz  /etc  &
// jobs
┌─[root@192]─[~]
└──? $jobs
[1]+ Running                  tar -zcf ect.tar.gz /etc  &

way 2 : press ctrl + z

// tar -zcf etc.tar.gz  /etc  
┌─[root@192]─[~]
└──? $tar -zcf etc.tar.gz  /etc  /

/ PRESS CTRL + Z 

// jobs
┌─[root@192]─[~]
└──? $jobs
[1]+ Stopped                  tar -zcf ect.tar.gz /etc  &

"fg %[Jobs ID]" ( jobs id is like [1] above) "bg %[jobs ID]"

fg resumes the jobs to foreground, bg resumes jobs to background

vmstat [time delay] [refresh time]

vmstat 1 3 

┌─[root@192]─[~]
└──? $vmstat 1 3
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
 2  0      0 336564   2108 454448    0    0    35    50   68  121  0  1 99  0  0
 0  0      0 336572   2108 454448    0    0     0     0   38   71  0  0 100  0  0
 0  0      0 336572   2108 454448    0    0     0     0   43   72  0  1 99  0  0

dmesg ( show what the kernel did when it boots)

┌─[root@nedrain]─[~]
└──? $dmesg
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Initializing cgroup subsys cpuacct
[    0.000000] Linux version 3.10.0-693.2.2.el7.x86_64 (builder@kbuilder.dev.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) ) #1 SMP Tue Sep 12 22:26:13 UTC 2017
[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.10.0-693.2.2.el7.x86_64 root=UUID=eb448abb-3012-4d8d-bcde-94434d586a31 ro crashkernel=auto net.ifnames=0 console=tty0 console=ttyS0,115200n8
[    0.000000] e820: BIOS-provided physical RAM map:
[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
[    0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x0000000013ffffff] usable
[    0.000000] BIOS-e820: [mem 0x0000000014000000-0x000000001511ffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000015120000-0x000000003dfcdfff] usable
[    0.000000] BIOS-e820: [mem 0x000000003dfce000-0x000000003fffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000feffc000-0x00000000feffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved
[    0.000000] NX (Execute Disable) protection: active
[    0.000000] SMBIOS 2.8 present.
[    0.000000] DMI: Alibaba Cloud Alibaba Cloud ECS, BIOS 8c24b4c 04/01/2014
[    0.000000] Hypervisor detected: KVM
[    0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[    0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[    0.000000] e820: last_pfn = 0x3dfce max_arch_pfn = 0x400000000
[    0.000000] MTRR default type: write-back
[    0.000000] MTRR fixed ranges enabled:
[    0.000000]   00000-9FFFF write-back
[    0.000000]   A0000-BFFFF uncachable
[    0.000000]   C0000-FFFFF write-protect
[    0.000000] MTRR variable ranges enabled:
[    0.000000]   0 base 000080000000 mask 3FFF80000000 uncachable
[    0.000000]   1 disabled
[    0.000000]   2 disabled
[    0.000000]   3 disabled
[    0.000000]   4 disabled
[    0.000000]   5 disabled
[    0.000000]   6 disabled
[    0.000000]   7 disabled
[    0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
[    0.000000] found SMP MP-table at [mem 0x000f5a10-0x000f5a1f] mapped at [ffff8800000f5a10]
[    0.000000] Base memory trampoline at [ffff880000099000] 99000 size 24576
[    0.000000] Using GB pages for direct mapping
[    0.000000] BRK [0x01fe9000, 0x01fe9fff] PGTABLE
[    0.000000] BRK [0x01fea000, 0x01feafff] PGTABLE
[    0.000000] BRK [0x01feb000, 0x01febfff] PGTABLE
[    0.000000] BRK [0x01fec000, 0x01fecfff] PGTABLE
[    0.000000] BRK [0x01fed000, 0x01fedfff] PGTABLE
[    0.000000] RAMDISK: [mem 0x35e41000-0x36f18fff]
[    0.000000] Early table checksum verification disabled
[    0.000000] ACPI: RSDP 00000000000f5810 00014 (v00 BOCHS )
[    0.000000] ACPI: RSDT 000000003dfe19c5 00034 (v01 BOCHS  BXPCRSDT 00000001 BXPC 00000001)
[    0.000000] ACPI: FACP 000000003dfe0bfe 00074 (v01 BOCHS  BXPCFACP 00000001 BXPC 00000001)
[    0.000000] ACPI: DSDT 000000003dfe0040 00BBE (v01 BOCHS  BXPCDSDT 00000001 BXPC 00000001)
[    0.000000] ACPI: FACS 000000003dfe0000 00040
[    0.000000] ACPI: SSDT 000000003dfe0c72 00C23 (v01 BOCHS  BXPCSSDT 00000001 BXPC 00000001)
[    0.000000] ACPI: APIC 000000003dfe1895 00078 (v01 BOCHS  BXPCAPIC 00000001 BXPC 00000001)
[    0.000000] ACPI: SRAT 000000003dfe190d 000B8 (v01 BOCHS  BXPCSRAT 00000001 BXPC 00000001)
[    0.000000] ACPI: Local APIC address 0xfee00000
[    0.000000] SRAT: PXM 0 -> APIC 0x00 -> Node 0
[    0.000000] SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
[    0.000000] SRAT: Node 0 PXM 0 [mem 0x00100000-0x3fffffff]
[    0.000000] NUMA: Node 0 [mem 0x00000000-0x0009ffff] + [mem 0x00100000-0x3dfcdfff] -> [mem 0x00000000-0x3dfcdfff]
[    0.000000] NODE_DATA(0) allocated [mem 0x3dfa7000-0x3dfcdfff]
[    0.000000] crashkernel=auto resulted in zero bytes of reserved memory.
[    0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00
[    0.000000] kvm-clock: cpu 0, msr 0:3df57001, primary cpu clock
[    0.000000] kvm-clock: using sched offset of 5637082418 cycles
[    0.000000] Zone ranges:
[    0.000000]   DMA      [mem 0x00001000-0x00ffffff]
[    0.000000]   DMA32    [mem 0x01000000-0xffffffff]
[    0.000000]   Normal   empty
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x00001000-0x0009efff]
[    0.000000]   node   0: [mem 0x00100000-0x13ffffff]
[    0.000000]   node   0: [mem 0x15120000-0x3dfcdfff]
[    0.000000] Initmem setup node 0 [mem 0x00001000-0x3dfcdfff]
[    0.000000] On node 0 totalpages: 249420
[    0.000000]   DMA zone: 64 pages used for memmap
[    0.000000]   DMA zone: 21 pages reserved
[    0.000000]   DMA zone: 3998 pages, LIFO batch:0
[    0.000000]   DMA32 zone: 3904 pages used for memmap
[    0.000000]   DMA32 zone: 245422 pages, LIFO batch:31
[    0.000000] ACPI: PM-Timer IO Port: 0x608
[    0.000000] ACPI: Local APIC address 0xfee00000
[    0.000000] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[    0.000000] ACPI: IOAPIC (id[0x00] address[0xfec00000] gsi_base[0])
[    0.000000] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[    0.000000] ACPI: IRQ0 used by override.
[    0.000000] ACPI: IRQ5 used by override.
[    0.000000] ACPI: IRQ9 used by override.
[    0.000000] ACPI: IRQ10 used by override.
[    0.000000] ACPI: IRQ11 used by override.
[    0.000000] Using ACPI (MADT) for SMP configuration information
[    0.000000] smpboot: Allowing 1 CPUs, 0 hotplug CPUs
[    0.000000] PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
[    0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000effff]
[    0.000000] PM: Registered nosave memory: [mem 0x000f0000-0x000fffff]
[    0.000000] PM: Registered nosave memory: [mem 0x14000000-0x1511ffff]
[    0.000000] e820: [mem 0x40000000-0xfeffbfff] available for PCI devices
[    0.000000] Booting paravirtualized kernel on KVM
[    0.000000] setup_percpu: NR_CPUS:5120 nr_cpumask_bits:1 nr_cpu_ids:1 nr_node_ids:1
[    0.000000] PERCPU: Embedded 33 pages/cpu @ffff88003dc00000 s97048 r8192 d29928 u2097152
[    0.000000] pcpu-alloc: s97048 r8192 d29928 u2097152 alloc=1*2097152
[    0.000000] pcpu-alloc: [0] 0
[    0.000000] KVM setup async PF for cpu 0
[    0.000000] kvm-stealtime: cpu 0, msr 3dc0f440
[    0.000000] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes)
[    0.000000] Built 1 zonelists in Node order, mobility grouping on.  Total pages: 245431
[    0.000000] Policy zone: DMA32
[    0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.10.0-693.2.2.el7.x86_64 root=UUID=eb448abb-3012-4d8d-bcde-94434d586a31 ro crashkernel=auto net.ifnames=0 console=tty0 console=ttyS0,115200n8
[    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[    0.000000] x86/fpu: xstate_offset[2]: 0240, xstate_sizes[2]: 0100
[    0.000000] x86/fpu: xstate_offset[3]: 03c0, xstate_sizes[3]: 0040
[    0.000000] x86/fpu: xstate_offset[4]: 0400, xstate_sizes[4]: 0040
[    0.000000] x86/fpu: xstate_offset[5]: 0440, xstate_sizes[5]: 0040
[    0.000000] x86/fpu: xstate_offset[6]: 0480, xstate_sizes[6]: 0200
[    0.000000] x86/fpu: xstate_offset[7]: 0680, xstate_sizes[7]: 0400
[    0.000000] xsave: enabled xstate_bv 0xff, cntxt size 0xa80 using standard form
[    0.000000] Memory: 946752k/1015608k available (6886k kernel code, 17928k absent, 50928k reserved, 4545k data, 1764k init)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000] 	RCU restricting CPUs from NR_CPUS=5120 to nr_cpu_ids=1.
[    0.000000] NR_IRQS:327936 nr_irqs:256 0
[    0.000000] Console: colour VGA+ 80x25
[    0.000000] console [tty0] enabled
[    0.000000] console [ttyS0] enabled
[    0.000000] allocated 4194304 bytes of page_cgroup
[    0.000000] please try ‘cgroup_disable=memory‘ option if you don‘t want memory cgroups
[    0.000000] tsc: Detected 2500.000 MHz processor
[    0.170643] Calibrating delay loop (skipped) preset value.. 5000.00 BogoMIPS (lpj=2500000)
[    0.172114] pid_max: default: 32768 minimum: 301
[    0.172905] Security Framework initialized
[    0.173638] SELinux:  Initializing.
[    0.174321] SELinux:  Starting in permissive mode
[    0.174322] Yama: becoming mindful.
[    0.175085] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
[    0.176249] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
[    0.177307] Mount-cache hash table entries: 2048 (order: 2, 16384 bytes)
[    0.178265] Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes)
[    0.179384] Initializing cgroup subsys memory
[    0.180145] Initializing cgroup subsys devices
[    0.180906] Initializing cgroup subsys freezer
[    0.181660] Initializing cgroup subsys net_cls
[    0.182414] Initializing cgroup subsys blkio
[    0.183160] Initializing cgroup subsys perf_event
[    0.183942] Initializing cgroup subsys hugetlb
[    0.184694] Initializing cgroup subsys pids
[    0.185429] Initializing cgroup subsys net_prio
[    0.186248] CPU: Physical Processor ID: 0
[    0.186976] CPU: Processor Core ID: 0
[    0.188692] mce: CPU supports 10 MCE banks
[    0.189451] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0
[    0.190291] Last level dTLB entries: 4KB 64, 2MB 0, 4MB 0
[    0.191131] tlb_flushall_shift: 6
[    0.200222] Freeing SMP alternatives: 24k freed
[    0.205608] ACPI: Core revision 20130517
[    0.206866] ACPI: All ACPI Tables successfully acquired
[    0.207831] ftrace: allocating 26586 entries in 104 pages
[    0.229774] smpboot: Max logical packages: 1
[    0.236061] Enabling x2apic
[    0.236689] Enabled x2apic
[    0.237459] Switched APIC routing to physical x2apic.
[    0.238988] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[    0.239882] smpboot: CPU0: Intel(R) Xeon(R) Platinum 8269CY CPU @ 2.50GHz (fam: 06, model: 55, stepping: 07)
[    0.241604] TSC deadline timer enabled
[    0.241611] Performance Events: unsupported p6 CPU model 85 no PMU driver, software events only.
[    0.243191] KVM setup paravirtual spinlock
[    0.244929] Brought up 1 CPUs
[    0.245577] smpboot: Total of 1 processors activated (5000.00 BogoMIPS)
[    0.246836] devtmpfs: initialized
[    0.249098] EVM: security.selinux
[    0.249777] EVM: security.ima
[    0.250410] EVM: security.capability
[    0.251622] atomic64 test passed for x86-64 platform with CX8 and with SSE
[    0.252598] pinctrl core: initialized pinctrl subsystem
[    0.253485] RTC time: 10:51:32, date: 06/16/20
[    0.254310] NET: Registered protocol family 16
[    0.255201] ACPI: bus type PCI registered
[    0.255924] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[    0.256928] PCI: Using configuration type 1 for base access
[    0.258372] ACPI: Added _OSI(Module Device)
[    0.259119] ACPI: Added _OSI(Processor Device)
[    0.259878] ACPI: Added _OSI(3.0 _SCP Extensions)
[    0.260658] ACPI: Added _OSI(Processor Aggregator Device)
[    0.261858] ACPI: EC: Look up EC in DSDT
[    0.262084] ACPI: Executed 2 blocks of module-level executable AML code
[    0.263396] ACPI: Interpreter enabled
[    0.264101] ACPI: (supports S0 S5)
[    0.264774] ACPI: Using IOAPIC for interrupt routing
[    0.265582] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[    0.268557] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[    0.269463] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI]
[    0.270432] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM
[    0.271398] acpi PNP0A03:00: fail to add MMCONFIG information, can‘t access extended PCI configuration space under this bridge.
[    0.273216] acpiphp: Slot [3] registered
[    0.273941] acpiphp: Slot [4] registered
[    0.274662] acpiphp: Slot [5] registered
[    0.275380] acpiphp: Slot [6] registered
[    0.276103] acpiphp: Slot [7] registered
[    0.276825] acpiphp: Slot [8] registered
[    0.277547] acpiphp: Slot [9] registered
[    0.278266] acpiphp: Slot [10] registered
[    0.278994] acpiphp: Slot [11] registered
[    0.279725] acpiphp: Slot [12] registered
[    0.280450] acpiphp: Slot [13] registered
[    0.281180] acpiphp: Slot [14] registered
[    0.281908] acpiphp: Slot [15] registered
[    0.282637] acpiphp: Slot [16] registered
[    0.283361] acpiphp: Slot [17] registered
[    0.284093] acpiphp: Slot [18] registered
[    0.284821] acpiphp: Slot [19] registered
[    0.285553] acpiphp: Slot [20] registered
[    0.286281] acpiphp: Slot [21] registered
[    0.287011] acpiphp: Slot [22] registered
[    0.287741] acpiphp: Slot [23] registered
[    0.288475] acpiphp: Slot [24] registered
[    0.289201] acpiphp: Slot [25] registered
[    0.289935] acpiphp: Slot [26] registered
[    0.290666] acpiphp: Slot [27] registered
[    0.291392] acpiphp: Slot [28] registered
[    0.292120] acpiphp: Slot [29] registered
[    0.292849] acpiphp: Slot [30] registered
[    0.293576] acpiphp: Slot [31] registered
[    0.294297] PCI host bridge to bus 0000:00
[    0.295023] pci_bus 0000:00: root bus resource [bus 00-ff]
[    0.295870] pci_bus 0000:00: root bus resource [io  0x0000-0x0cf7 window]
[    0.296822] pci_bus 0000:00: root bus resource [io  0x0d00-0xadff window]
[    0.297774] pci_bus 0000:00: root bus resource [io  0xae0f-0xaeff window]
[    0.298722] pci_bus 0000:00: root bus resource [io  0xaf20-0xafdf window]
[    0.299677] pci_bus 0000:00: root bus resource [io  0xafe4-0xffff window]
[    0.300624] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
[    0.301955] pci_bus 0000:00: root bus resource [mem 0x40000000-0xfebfffff window]
[    0.303309] pci 0000:00:00.0: [8086:1237] type 00 class 0x060000
[    0.303563] pci 0000:00:01.0: [8086:7000] type 00 class 0x060100
[    0.303908] pci 0000:00:01.1: [8086:7010] type 00 class 0x010180
[    0.309291] pci 0000:00:01.1: reg 0x20: [io  0xc060-0xc06f]
[    0.311356] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io  0x01f0-0x01f7]
[    0.312349] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io  0x03f6]
[    0.313287] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io  0x0170-0x0177]
[    0.314267] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io  0x0376]
[    0.315305] pci 0000:00:01.2: [8086:7020] type 00 class 0x0c0300
[    0.320479] pci 0000:00:01.2: reg 0x20: [io  0xc000-0xc01f]
[    0.322634] pci 0000:00:01.3: [8086:7113] type 00 class 0x068000
[    0.322900] pci 0000:00:01.3: quirk: [io  0x0600-0x063f] claimed by PIIX4 ACPI
[    0.324222] pci 0000:00:01.3: quirk: [io  0x0700-0x070f] claimed by PIIX4 SMB
[    0.325346] pci 0000:00:02.0: [1013:00b8] type 00 class 0x030000
[    0.328247] pci 0000:00:02.0: reg 0x10: [mem 0xfc000000-0xfdffffff pref]
[    0.330537] pci 0000:00:02.0: reg 0x14: [mem 0xfebf0000-0xfebf0fff]
[    0.341852] pci 0000:00:02.0: reg 0x30: [mem 0xfebe0000-0xfebeffff pref]
[    0.341992] pci 0000:00:03.0: [1af4:1003] type 00 class 0x078000
[    0.343993] pci 0000:00:03.0: reg 0x10: [io  0xc020-0xc03f]
[    0.345951] pci 0000:00:03.0: reg 0x14: [mem 0xfebf1000-0xfebf1fff]
[    0.355925] pci 0000:00:04.0: [1af4:1001] type 00 class 0x010000
[    0.358663] pci 0000:00:04.0: reg 0x10: [mem 0xfe000000-0xfe000fff 64bit pref]
[    0.360767] pci 0000:00:04.0: reg 0x18: [mem 0xfe001000-0xfe001fff 64bit pref]
[    0.367247] pci 0000:00:05.0: [1af4:1000] type 00 class 0x020000
[    0.369383] pci 0000:00:05.0: reg 0x10: [mem 0xfe002000-0xfe002fff 64bit pref]
[    0.371487] pci 0000:00:05.0: reg 0x18: [mem 0xfe003000-0xfe003fff 64bit pref]
[    0.377933] pci 0000:00:06.0: [1af4:1002] type 00 class 0x00ff00
[    0.379000] pci 0000:00:06.0: reg 0x10: [io  0xc040-0xc05f]
[    0.385543] ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)
[    0.386776] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
[    0.387989] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
[    0.389197] ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)
[    0.390384] ACPI: PCI Interrupt Link [LNKS] (IRQs *9)
[    0.391577] ACPI: Enabled 16 GPEs in block 00 to 0F
[    0.392554] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
[    0.393938] vgaarb: loaded
[    0.394550] vgaarb: bridge control possible 0000:00:02.0
[    0.395413] SCSI subsystem initialized
[    0.396132] ACPI: bus type USB registered
[    0.396861] usbcore: registered new interface driver usbfs
[    0.397712] usbcore: registered new interface driver hub
[    0.398548] usbcore: registered new device driver usb
[    0.399406] PCI: Using ACPI for IRQ routing
[    0.400139] PCI: pci_cache_line_size set to 64 bytes
[    0.400245] e820: reserve RAM buffer [mem 0x0009fc00-0x0009ffff]
[    0.400247] e820: reserve RAM buffer [mem 0x3dfce000-0x3fffffff]
[    0.400310] NetLabel: Initializing
[    0.400985] NetLabel:  domain hash size = 128
[    0.401733] NetLabel:  protocols = UNLABELED CIPSOv4
[    0.402541] NetLabel:  unlabeled traffic allowed by default
[    0.403413] amd_nb: Cannot enumerate AMD northbridges
[    0.404230] Switched to clocksource kvm-clock
[    0.407952] pnp: PnP ACPI init
[    0.408617] ACPI: bus type PNP registered
[    0.409379] pnp 00:00: Plug and Play ACPI device, IDs PNP0b00 (active)
[    0.409404] pnp 00:01: Plug and Play ACPI device, IDs PNP0303 (active)
[    0.409425] pnp 00:02: Plug and Play ACPI device, IDs PNP0f13 (active)
[    0.409447] pnp 00:03: [dma 2]
[    0.409454] pnp 00:03: Plug and Play ACPI device, IDs PNP0700 (active)
[    0.409504] pnp 00:04: Plug and Play ACPI device, IDs PNP0501 (active)
[    0.409618] pnp: PnP ACPI: found 5 devices
[    0.410345] ACPI: bus type PNP unregistered
[    0.416246] pci_bus 0000:00: resource 4 [io  0x0000-0x0cf7 window]
[    0.416248] pci_bus 0000:00: resource 5 [io  0x0d00-0xadff window]
[    0.416249] pci_bus 0000:00: resource 6 [io  0xae0f-0xaeff window]
[    0.416250] pci_bus 0000:00: resource 7 [io  0xaf20-0xafdf window]
[    0.416251] pci_bus 0000:00: resource 8 [io  0xafe4-0xffff window]
[    0.416252] pci_bus 0000:00: resource 9 [mem 0x000a0000-0x000bffff window]
[    0.416253] pci_bus 0000:00: resource 10 [mem 0x40000000-0xfebfffff window]
[    0.416274] NET: Registered protocol family 2
[    0.417143] TCP established hash table entries: 8192 (order: 4, 65536 bytes)
[    0.418132] TCP bind hash table entries: 8192 (order: 5, 131072 bytes)
[    0.419073] TCP: Hash tables configured (established 8192 bind 8192)
[    0.420015] TCP: reno registered
[    0.420673] UDP hash table entries: 512 (order: 2, 16384 bytes)
[    0.421556] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[    0.422504] NET: Registered protocol family 1
[    0.423263] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[    0.424153] pci 0000:00:01.0: PIIX3: Enabling Passive Release
[    0.425031] pci 0000:00:01.0: Activating ISA DMA hang workarounds
[    0.444225] ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 11
[    0.463883] pci 0000:00:02.0: Boot video device
[    0.463922] PCI: CLS 0 bytes, default 64
[    0.463947] Unpacking initramfs...
[    0.646054] Freeing initrd memory: 17248k freed
[    0.650468] RAPL PMU: API unit is 2^-32 Joules, 3 fixed counters, 10737418240 ms ovfl timer
[    0.651876] RAPL PMU: hw unit of domain pp0-core 2^-0 Joules
[    0.652733] RAPL PMU: hw unit of domain package 2^-0 Joules
[    0.653586] RAPL PMU: hw unit of domain dram 2^-16 Joules
[    0.654569] sha1_ssse3: Using AVX optimized SHA-1 implementation
[    0.655499] sha256_ssse3: Using AVX2 optimized SHA-256 implementation
[    0.656556] futex hash table entries: 256 (order: 2, 16384 bytes)
[    0.665327] Initialise system trusted keyring
[    0.666094] audit: initializing netlink socket (disabled)
[    0.666939] type=2000 audit(1592275893.569:1): initialized
[    0.687731] HugeTLB registered 1 GB page size, pre-allocated 0 pages
[    0.688660] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[    0.690123] zpool: loaded
[    0.690732] zbud: loaded
[    0.691429] VFS: Disk quotas dquot_6.5.2
[    0.692163] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    0.693190] msgmni has been set to 1882
[    0.693931] Key type big_key registered
[    0.694641] SELinux:  Registering netfilter hooks
[    0.694929] NET: Registered protocol family 38
[    0.695702] Key type asymmetric registered
[    0.696431] Asymmetric key parser ‘x509‘ registered
[    0.697251] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 250)
[    0.698600] io scheduler noop registered
[    0.699321] io scheduler deadline registered (default)
[    0.700162] io scheduler cfq registered
[    0.700942] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[    0.701801] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[    0.702792] intel_idle: does not run on family 6 model 85
[    0.702829] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[    0.704159] ACPI: Power Button [PWRF]
[    0.704924] GHES: HEST is not enabled!
[    0.705660] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    0.731060] 00:04: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[    0.732135] Non-volatile memory driver v1.3
[    0.732885] Linux agpgart interface v0.103
[    0.733684] crash memory driver: version 1.1
[    0.734466] rdac: device handler registered
[    0.735213] hp_sw: device handler registered
[    0.735957] emc: device handler registered
[    0.736687] alua: device handler registered
[    0.737440] libphy: Fixed MDIO Bus: probed
[    0.738196] ehci_hcd: USB 2.0 ‘Enhanced‘ Host Controller (EHCI) Driver
[    0.739129] ehci-pci: EHCI PCI platform driver
[    0.739891] ohci_hcd: USB 1.1 ‘Open‘ Host Controller (OHCI) Driver
[    0.740797] ohci-pci: OHCI PCI platform driver
[    0.741561] uhci_hcd: USB Universal Host Controller Interface driver
[    0.761348] uhci_hcd 0000:00:01.2: UHCI Host Controller
[    0.762212] uhci_hcd 0000:00:01.2: new USB bus registered, assigned bus number 1
[    0.763545] uhci_hcd 0000:00:01.2: detected 2 ports
[    0.764395] uhci_hcd 0000:00:01.2: irq 11, io base 0x0000c000
[    0.765319] usb usb1: New USB device found, idVendor=1d6b, idProduct=0001
[    0.766281] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.767593] usb usb1: Product: UHCI Host Controller
[    0.768386] usb usb1: Manufacturer: Linux 3.10.0-693.2.2.el7.x86_64 uhci_hcd
[    0.769362] usb usb1: SerialNumber: 0000:00:01.2
[    0.770179] hub 1-0:1.0: USB hub found
[    0.770888] hub 1-0:1.0: 2 ports detected
[    0.771694] usbcore: registered new interface driver usbserial
[    0.772573] usbcore: registered new interface driver usbserial_generic
[    0.773515] usbserial: USB Serial support registered for generic
[    0.774418] i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
[    0.776288] serio: i8042 KBD port at 0x60,0x64 irq 1
[    0.777092] serio: i8042 AUX port at 0x60,0x64 irq 12
[    0.777943] mousedev: PS/2 mouse device common for all mice
[    0.778992] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input1
[    0.780797] input: VirtualPS/2 VMware VMMouse as /devices/platform/i8042/serio1/input/input2
[    0.782243] rtc_cmos 00:00: RTC can wake from S4
[    0.783310] input: VirtualPS/2 VMware VMMouse as /devices/platform/i8042/serio1/input/input3
[    0.784746] rtc_cmos 00:00: rtc core: registered rtc_cmos as rtc0
[    0.785703] rtc_cmos 00:00: alarms up to one day, 114 bytes nvram
[    0.786636] cpuidle: using governor menu
[    0.787429] hidraw: raw HID events driver (C) Jiri Kosina
[    0.788321] usbcore: registered new interface driver usbhid
[    0.789177] usbhid: USB HID core driver
[    0.789925] drop_monitor: Initializing network drop monitor service
[    0.790886] TCP: cubic registered
[    0.791555] Initializing XFRM netlink socket
[    0.792351] NET: Registered protocol family 10
[    0.793224] NET: Registered protocol family 17
[    0.794057] microcode: CPU0 sig=0x50657, pf=0x1, revision=0x1
[    0.794937] microcode: Microcode Update Driver: v2.01 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
[    0.796431] PM: Hibernation image not present or could not be loaded.
[    0.796433] Loading compiled-in X.509 certificates
[    0.797238] Loaded X.509 cert ‘CentOS Linux kpatch signing key: ea0413152cde1d98ebdca3fe6f0230904c9ef717‘
[    0.798759] Loaded X.509 cert ‘CentOS Linux Driver update signing key: 7f421ee0ab69461574bb358861dbe77762a4201b‘
[    0.800636] Loaded X.509 cert ‘CentOS Linux kernel signing key: c08b355341760f030a64e3c550e113cd47771ea9‘
[    0.802153] registered taskstats version 1
[    0.804042] Key type trusted registered
[    0.805772] Key type encrypted registered
[    0.807474] IMA: No TPM chip found, activating TPM-bypass!
[    0.808521]   Magic number: 8:600:881
[    0.809287] rtc_cmos 00:00: setting system clock to 2020-06-16 10:51:33 UTC (1592304693)
[    0.811279] Freeing unused kernel memory: 1764k freed
[    0.814021] random: systemd: uninitialized urandom read (16 bytes read)
[    0.815365] random: systemd: uninitialized urandom read (16 bytes read)
[    0.816335] random: systemd: uninitialized urandom read (16 bytes read)
[    0.818058] systemd[1]: systemd 219 running in system mode. (+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ -LZ4 -SECCOMP +BLKID +ELFUTILS +KMOD +IDN)
[    0.820614] systemd[1]: Detected virtualization kvm.
[    0.821420] systemd[1]: Detected architecture x86-64.
[    0.822237] systemd[1]: Running in initial RAM disk.
[    0.823692] systemd[1]: Set hostname to <localhost.localdomain>.
[    0.840514] random: systemd: uninitialized urandom read (16 bytes read)
[    0.841513] random: systemd: uninitialized urandom read (16 bytes read)
[    0.842491] random: systemd: uninitialized urandom read (16 bytes read)
[    0.843482] random: systemd: uninitialized urandom read (16 bytes read)
[    0.844749] random: systemd: uninitialized urandom read (16 bytes read)
[    0.845789] random: systemd: uninitialized urandom read (16 bytes read)
[    0.846848] random: systemd: uninitialized urandom read (16 bytes read)
[    0.850344] systemd[1]: Reached target Local File Systems.
[    0.851206] systemd[1]: Starting Local File Systems.
[    0.852474] systemd[1]: Reached target Swap.
[    0.853220] systemd[1]: Starting Swap.
[    0.854381] systemd[1]: Reached target Timers.
[    0.855147] systemd[1]: Starting Timers.
[    0.856457] systemd[1]: Created slice Root Slice.
[    0.857247] systemd[1]: Starting Root Slice.
[    0.858511] systemd[1]: Listening on udev Kernel Socket.
[    0.859350] systemd[1]: Starting udev Kernel Socket.
[    0.860708] systemd[1]: Listening on udev Control Socket.
[    0.861560] systemd[1]: Starting udev Control Socket.
[    0.862883] systemd[1]: Listening on Journal Socket.
[    0.863697] systemd[1]: Starting Journal Socket.
[    0.864960] systemd[1]: Reached target Sockets.
[    0.865736] systemd[1]: Starting Sockets.
[    0.866983] systemd[1]: Created slice System Slice.
[    0.867788] systemd[1]: Starting System Slice.
[    0.868793] systemd[1]: Starting Create list of required static device nodes for the current kernel...
[    0.871097] systemd[1]: Starting Journal Service...
[    0.873285] systemd[1]: Starting Setup Virtual Console...
[    0.875976] systemd[1]: Starting dracut cmdline hook...
[    0.882645] systemd[1]: Reached target Slices.
[    0.884998] systemd[1]: Starting Slices.
[    0.888538] systemd[1]: Starting Apply Kernel Variables...
[    0.920276] systemd[1]: Started Journal Service.
[    1.010987] random: fast init done
[    1.073237] usb 1-1: new full-speed USB device number 2 using uhci_hcd
[    1.089542] FDC 0 is a S82078B
[    1.154988] libata version 3.00 loaded.
[    1.168004] [drm] Initialized
[    1.183770] ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 10
[    1.184690] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
[    1.192201] ata_piix 0000:00:01.1: version 2.13
[    1.198236] scsi host0: ata_piix
[    1.205297] scsi host1: ata_piix
[    1.205998] ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc060 irq 14
[    1.206957] ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc068 irq 15
[    1.208248] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
[    1.209419] virtio-pci 0000:00:05.0: virtio_pci: leaving for legacy driver
[    1.244019] ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 10
[    1.244918] virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
[    1.252334] virtio-pci 0000:00:04.0: irq 24 for MSI/MSI-X
[    1.252348] virtio-pci 0000:00:04.0: irq 25 for MSI/MSI-X
[    1.254333] virtio-pci 0000:00:05.0: irq 26 for MSI/MSI-X
[    1.254346] virtio-pci 0000:00:05.0: irq 27 for MSI/MSI-X
[    1.254357] virtio-pci 0000:00:05.0: irq 28 for MSI/MSI-X
[    1.255387] virtio-pci 0000:00:03.0: irq 29 for MSI/MSI-X
[    1.255399] virtio-pci 0000:00:03.0: irq 30 for MSI/MSI-X
[    1.260247] [TTM] Zone  kernel: Available graphics memory: 482894 kiB
[    1.261192] [TTM] Initializing pool allocator
[    1.261981] [TTM] Initializing DMA pool allocator
[    1.262975] [drm] fb mappable at 0xFC000000
[    1.263726] [drm] vram aper at 0xFC000000
[    1.264457] [drm] size 33554432
[    1.265104] [drm] fb depth is 24
[    1.265764] [drm]    pitch is 3072
[    1.267386] fbcon: cirrusdrmfb (fb0) is primary device
[    1.286687] Console: switching to colour frame buffer device 128x48
[    1.286700]  vda: vda1
[    1.295804] cirrus 0000:00:02.0: fb0: cirrusdrmfb frame buffer device
[    1.304145] [drm] Initialized cirrus 1.0.0 20110418 for 0000:00:02.0 on minor 0
[    1.657255] tsc: Refined TSC clocksource calibration: 2499.914 MHz
[    3.767806] usb 1-1: New USB device found, idVendor=0627, idProduct=0001
[    3.768333] usb 1-1: New USB device strings: Mfr=1, Product=3, SerialNumber=5
[    3.768882] usb 1-1: Product: QEMU USB Tablet
[    3.769217] usb 1-1: Manufacturer: QEMU
[    3.769522] usb 1-1: SerialNumber: 42
[    5.433392] input: QEMU QEMU USB Tablet as /devices/pci0000:00/0000:00:01.2/usb1/1-1/1-1:1.0/input/input4
[    5.434226] hid-generic 0003:0627:0001.0001: input,hidraw0: USB HID v0.01 Pointer [QEMU QEMU USB Tablet] on usb-0000:00:01.2-1/input0
[    5.731038] EXT4-fs (vda1): mounted filesystem with ordered data mode. Opts: (null)
[    5.960489] systemd-journald[86]: Received SIGTERM from PID 1 (systemd).
[    6.118224] SELinux:  Disabled at runtime.
[    6.119166] SELinux:  Unregistering netfilter hooks
[    6.119262] type=1404 audit(1592304698.809:2): selinux=0 auid=4294967295 ses=4294967295
[    6.123943] systemd[1]: RTC configured in localtime, applying delta of 480 minutes to system time.
[    6.202307] ip_tables: (C) 2000-2006 Netfilter Core Team
[    6.203372] systemd[1]: Inserted module ‘ip_tables‘
[    6.591965] EXT4-fs (vda1): re-mounted. Opts: (null)
[    6.694447] systemd-journald[326]: Received request to flush runtime journal from PID 1
[    6.820967] type=1305 audit(1592275899.510:3): audit_pid=378 old=0 auid=4294967295 ses=4294967295 res=1
[    6.826947] piix4_smbus 0000:00:01.3: SMBus Host Controller at 0x700, revision 0
[    6.846431] input: PC Speaker as /devices/platform/pcspkr/input/input5
[    6.897107] ppdev: user-space parallel port driver
[    6.907454] AES CTR mode by8 optimization enabled
[    6.925868] alg: No test for __gcm-aes-aesni (__driver-gcm-aes-aesni)
[    6.931093] alg: No test for crc32 (crc32-pclmul)
[    6.942324] EDAC MC: Ver: 3.0.0
[   10.931142] random: crng init done
[54215.562543] AliSecGuard: loading out-of-tree module taints kernel.
[54215.563070] AliSecGuard: module verification failed: signature and/or required key missing - tainting kernel

free -h ( show the memory)

┌─[root@192]─[~]
└──? $free -h
              total        used        free      shared  buff/cache   available
Mem:           972M        197M        328M        7.7M        445M        621M
Swap:          2.0G          0B        2.0G

cpu info : vim /proc/cpuinfo

┌─[root@192]─[/proc]
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 61
model name      : Intel(R) Core(TM) i7-5650U CPU @ 2.20GHz
stepping        : 4
microcode       : 0x2d
cpu MHz         : 2199.983
cache size      : 4096 KB
physical id     : 0
siblings        : 1
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 20
wp              : yes

vim /proc/meminfo

vim /proc/meminfo
//output
MemTotal:         995684 kB
MemFree:          334688 kB
MemAvailable:     634328 kB
Buffers:            2108 kB
Cached:           411692 kB
SwapCached:            0 kB
Active:           244384 kB
Inactive:         239424 kB
Active(anon):      70540 kB
Inactive(anon):     7324 kB
Active(file):     173844 kB
Inactive(file):   232100 kB
Unevictable:           0 kB
Mlocked:               0 kB
SwapTotal:       2097148 kB
SwapFree:        2097148 kB
Dirty:                 4 kB
Writeback:             0 kB
AnonPages:         70028 kB
Mapped:            28840 kB
Shmem:              7856 kB
Slab:              90584 kB
SReclaimable:      42792 kB
SUnreclaim:        47792 kB
KernelStack:        4016 kB
PageTables:         4680 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     2594988 kB
Committed_AS:     342116 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      194928 kB
VmallocChunk:   34359310332 kB
Percpu:            33280 kB
HardwareCorrupted:     0 kB
AnonHugePages:      6144 kB
CmaTotal:              0 kB
CmaFree:               0 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:       83840 kB
DirectMap2M:      964608 kB
DirectMap1G:           0 kB

uname -a | -r ( information about the kernel)

┌─[root@192]─[/]
└──? $uname -a
Linux 192.168.5.14 3.10.0-1127.el7.x86_64 #1 SMP Tue Mar 31 23:36:51 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
┌─[root@192]─[/]
└──? $uname
Linux
┌─[root@192]─[/]
└──? $uname -r
3.10.0-1127.el7.x86_64

lsb_release -a (show the release version of linux, if you haven‘t installed this command, use "yum -y install redhat-lsb")

┌─[root@192]─[/]
└──? $lsb_release -a
LSB Version:	:core-4.1-amd64:core-4.1-noarch:cxx-4.1-amd64:cxx-4.1-noarch:desktop-4.1-amd64:desktop-4.1-noarch:languages-4.1-amd64:languages-4.1-noarch:printing-4.1-amd64:printing-4.1-noarch
Distributor ID:	CentOS
Description:	CentOS Linux release 7.8.2003 (Core)
Release:	7.8.2003
Codename:	Core

Linux Process & Jobs & System & Kernel

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