# uname --help
Usage: uname [OPTION]...
Print certain system information.  With no OPTION, same as -s.

  -a, --all                print all information, in the following order,
                             except omit -p and -i if unknown:
  -s, --kernel-name        print the kernel name
  -n, --nodename           print the network node hostname
  -r, --kernel-release     print the kernel release
  -v, --kernel-version     print the kernel version
  -m, --machine            print the machine hardware name
  -p, --processor          print the processor type or "unknown"
  -i, --hardware-platform  print the hardware platform or "unknown"
  -o, --operating-system   print the operating system
      --help     display this help and exit
      --version  output version information and exit

GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
For complete documentation, run: info coreutils ‘uname invocation‘
(base) [root@analysis ~]# uname -a
Linux analysis 4.4.216-1.el7.elrepo.x86_64 #1 SMP Wed Mar 11 09:13:43 EDT 2020 x86_64 x86_64 x86_64 GNU/Linux
(base) [root@analysis ~]# uname -s
Linux
(base) [root@analysis ~]# uname -n
analysis
(base) [root@analysis ~]# uname -r
4.4.216-1.el7.elrepo.x86_64
(base) [root@analysis ~]# uname -v
#1 SMP Wed Mar 11 09:13:43 EDT 2020
(base) [root@analysis ~]# uname -m
x86_64
(base) [root@analysis ~]# uname -p
x86_64
(base) [root@analysis ~]# uname -i
x86_64
(base) [root@analysis ~]# uname -o
GNU/Linux

$ lsb_release -a
LSB Version:    n/a
Distributor ID:    ManjaroLinux
Description:    Manjaro Linux
Release:    19.0.2
Codename:    Kyria

$ lsb_release -h
FSG lsb_release v1.4 prints certain LSB (Linux Standard Base) and
Distribution information.

Usage: lsb_release [OPTION]...
With no OPTION specified it is the same as -v.

Options:
  -v, --version
    Display the version of the LSB specification against which the distribution is compliant.
  -i, --id
    Display the string id of the distributor.
  -d, --description
    Display the single line text description of the distribution.
  -r, --release
    Display the release number of the distribution.
  -c, --codename
    Display the codename according to the distribution release.
  -a, --all
    Display all of the above information.
  -s, --short
    Display all of the above information in short output format.
  -h, --help
    Display this message.
$ lsb_release -v
LSB Version:    n/a
$ lsb_release -i
Distributor ID:    ManjaroLinux
$ lsb_release -d
Description:    Manjaro Linux
$ lsb_release -r
Release:    19.0.2
$ lsb_release -c
Codename:    Kyria
$ lsb_release -s
n/a

# cat /etc/centos-release
CentOS Linux release 7.7.1908 (Core)

$ ls /etc/| grep rel
arch-release
lsb-release
manjaro-release
os-release
$ cat /etc/arch-release 
Manjaro Linux
$ cat /etc/lsb-release 
DISTRIB_ID=ManjaroLinux
DISTRIB_RELEASE=19.0.2
DISTRIB_CODENAME=Kyria
DISTRIB_DESCRIPTION="Manjaro Linux"
$ cat /etc/os-release 
NAME="Manjaro Linux"
ID=manjaro
ID_LIKE=arch
PRETTY_NAME="Manjaro Linux"
ANSI_COLOR="1;32"
HOME_URL="https://www.manjaro.org/"
SUPPORT_URL="https://www.manjaro.org/"
BUG_REPORT_URL="https://bugs.manjaro.org/"
LOGO=manjarolinux