last:查看目前和过去的用户登录信息
[root@paulinux ~]# last
root pts/0 192.168.1.106 Fri Jun 10 09:53 still logged in
admin tty1 :0 Fri Jun 10 09:47 still logged in
root tty5 Fri Jun 10 09:31 still logged in
reboot system boot 2.6.32-431.el6.x Fri Jun 10 17:35 - 09:56 (-7:-38)
root tty5 Fri Jun 3 07:31 - down (00:34)
reboot system boot 2.6.32-431.el6.x Fri Jun 3 07:27 - 08:06 (00:39)
root tty5 Fri Jun 3 07:21 - down (00:04)
admin tty1 :0 Fri Jun 3 07:21 - down (00:05)
reboot system boot 2.6.32-431.el6.x Fri Jun 3 07:09 - 07:26 (00:16)
root tty5 Fri Jun 3 07:01 - down (00:07)
admin tty1 :0 Fri Jun 3 06:57 - down (00:10)
reboot system boot 2.6.32-431.el6.x Fri Jun 3 06:57 - 07:08 (00:11)
root tty5 Fri Jun 3 06:28 - down (00:27)
admin tty1 :0 Fri Jun 3 06:28 - down (00:27)
lastlog:只显示用户最后登录信息
[root@paulinux ~]# lastlog
Username Port From Latest
root pts/0 192.168.1.106 Fri Jun 10 09:53:00 +0800 2016
bin **Never logged in**
daemon **Never logged in**
adm **Never logged in**
lp **Never logged in**
sync **Never logged in**
shutdown **Never logged in**
halt **Never logged in**
mail **Never logged in**
uucp **Never logged in**
operator **Never logged in**
games **Never logged in**
gopher **Never logged in**
ftp **Never logged in**
nobody **Never logged in**
dbus **Never logged in**
rpc **Never logged in**
oprofile **Never logged in**
vcsa **Never logged in**
rtkit **Never logged in**
abrt **Never logged in**
avahi-autoipd **Never logged in**
hsqldb **Never logged in**
saslauth **Never logged in**
rpcuser **Never logged in**
nfsnobody **Never logged in**
postfix **Never logged in**
ricci **Never logged in**
haldaemon **Never logged in**
gdm **Never logged in**
ntp **Never logged in**
apache **Never logged in**
amandabackup **Never logged in**
pulse **Never logged in**
tomcat **Never logged in**
sshd **Never logged in**
luci **Never logged in**
mysql **Never logged in**
dovecot **Never logged in**
dovenull **Never logged in**
tcpdump **Never logged in**
admin tty6 Fri May 27 06:10:56 +0800 2016
traceroute：查看网络路径
[root@paulinux ~]# traceroute www.163.com
traceroute to www.163.com (42.81.28.74), 30 hops max, 60 byte packets
1 192.168.1.1 (192.168.1.1) 0.236 ms 0.197 ms 0.454 ms
2 10.8.0.1 (10.8.0.1) 4.405 ms 4.396 ms 4.382 ms
3 172.16.3.173 (172.16.3.173) 2.765 ms 2.750 ms 2.632 ms
4 172.16.33.1 (172.16.33.1) 2.947 ms 3.503 ms 3.492 ms
5 10.1.1.1 (10.1.1.1) 3.485 ms 3.460 ms 3.453 ms
6 * * *
7 * * *
8 123.151.29.73 (123.151.29.73) 7.249 ms 219.150.51.105 (219.150.51.105) 4.883 ms 123.151.29.73 (123.151.29.73) 7.226 ms
9 221.238.222.101 (221.238.222.101) 2.943 ms 219.150.38.141 (219.150.38.141) 3.252 ms 219.150.38.229 (219.150.38.229) 4.826 ms
10 42.81.32.22 (42.81.32.22) 4.197 ms 4.122 ms 4.120 ms
11 42.81.1.54 (42.81.1.54) 7.702 ms 42.81.1.6 (42.81.1.6) 209.992 ms *
12 42.81.0.166 (42.81.0.166) 9.554 ms 42.81.0.194 (42.81.0.194) 8.810 ms 42.81.0.190 (42.81.0.190) 8.765 ms
13 42.81.28.74 (42.81.28.74) 4.167 ms 4.650 ms 3.413 ms
netstat:查看网络情况
参数：-t :tcp协议
-u:udp协议
-l：listen监听
-r:路由
-n:显示IP和端口号
常用用法：netstat -tlun ##显示本机监听的端口
netstat -an ##显示本机所有网络连接
netstat -rn ##显示本机路由信息
setup:进入管理的图形界面