# centos7查看命令

[root@localhost ~]# cat /etc/os-release

# centos6/7通用命令

[root@localhost ~]# cat /etc/redhat-release

[root@localhost ~]# cat /etc/redhat-release | sed -r 's/.* ([0-9]+)\..*/\1/'

# centos6/7通用命令

[root@localhost ~]# cat /etc/centos-release

[root@localhost ~]# cat /etc/centos-release | sed -r 's/.* ([0-9]+)\..*/\1/'

# centos6/7通用命令

[root@localhost ~]# rpm -q centos-release

[root@localhost ~]# rpm -q centos-release | cut -d- -f3

# radhat或centos存在/etc/redhat-release这个文件。【命令 cat /etc/redhat-release】

ubuntu@VM-0-9-ubuntu:~$ lsb_release -a

ubuntu@VM-0-9-ubuntu:~$ cat /etc/os-release

ubuntu@VM-0-9-ubuntu:~$ cat /etc/issue

ubuntu@VM-0-9-ubuntu:~$ less /etc/issue

# ubuntu存在 : /etc/lsb-release 这个文件 【命令 cat /etc/lsb-release】

[root@localhost ~]# cat /proc/version

[root@localhost ~]# uname -a