Linux下命令查看区分ubuntu、centos操作系统

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#linux #ubuntu #centos

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Linux下有时需要根据系统类型是centos，或ubuntu，从而进行选择不同的命令执行，
有下面几种命令可以确定系统类型

lsb_release -a
cat /etc/redhat-release
cat /etc/issue
cat /proc/version

下图是在centos系统几种命令的输出

[root@localhost]# lsb_release -a
bash: lsb_release: command not found...

[root@localhost]# cat /etc/redhat-release
CentOS Linux release 7.8.2003 (Core)

[root@localhost]# cat /etc/issue
\S
Kernel \r on an \m

[root@localhost]# cat /proc/version
Linux version 3.10.0-1127.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC) ) #1 SMP Tue Mar 31 23:36:51 UTC 2020

下图是在ubuntu系统几种命令的输出

root@ubuntu:/home# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.2 LTS
Release:        18.04
Codename:       bionic

root@ubuntu:/home# cat /etc/redhat-release
cat: /etc/redhat-release: No such file or directory

root@ubuntu:/home# cat /etc/issue
Ubuntu 18.04.2 LTS \n \l

root@ubuntu:/home# cat /proc/version
Linux version 4.15.0-176-generic (buildd@lcy02-amd64-020) (gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)) #185-Ubuntu SMP Tue Mar 29 17:40:04 UTC 2022