背景
写 shell 脚本的时候想根据系统版本来做条件判断，所以这篇就是这里搬那里搬，当做记录了
cat /proc/version
获取内核信息
[root@poloyy ~]# cat /proc/version
Linux version 4.18.0-240.22.1.el8_3.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 8.3.120191121 (Red Hat 8.3.1-5) (GCC)) #1 SMP Thu Apr 819:01:30 UTC 2021
uname -a
获取内核信息
[root@poloyy ~]# uname -a
Linux poloyy 4.18.0-240.22.1.el8_3.x86_64 #1 SMP Thu Apr 819:01:30 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
lsb_release -a
- 获取系统信息
- 有些系统会没有 lsb_release 命令
[root@poloyy ~]# lsb_release -a LSB Version: :core-4.1-amd64:core-4.1-noarch Distributor ID: CentOS Description: CentOS Linux release 8.3.2011 Release: 8.3.2011 Codename: n/a
cat /etc/os-release
获取系统信息
[root@poloyy ~]# cat /etc/os-release NAME="CentOS Linux" VERSION="8" ID="centos" ID_LIKE="rhel fedora" VERSION_ID="8" PLATFORM_ID="platform:el8" PRETTY_NAME="CentOS Linux 8" ANSI_COLOR="0;31" CPE_NAME="cpe:/o:centos:centos:8" HOME_URL="https://centos.org/" BUG_REPORT_URL="https://bugs.centos.org/" CENTOS_MANTISBT_PROJECT="CentOS-8" CENTOS_MANTISBT_PROJECT_VERSION="8"
cat /etc/redhat-release
仅适用于 Redhat 系的 Linux
[root@poloyy ~]# cat /etc/redhat-release
CentOS Linux release 8.3.2011
hostnamectl
获取系统信息
[root@poloyy ~]# hostnamectl Static hostname: poloyy Icon name: computer-vm Chassis: vm Machine ID: 20200519114807021642997698320941 Boot ID: da0aa5943375449c8bdb8bdd63e162f3 Virtualization: kvm Operating System: CentOS Linux 8 CPE OS Name: cpe:/o:centos:centos:8 Kernel: Linux 4.18.0-240.22.1.el8_3.x86_64 Architecture: x86-64
准确获取系统版本号
方式一
sudocat /etc/redhat-release|sed -r 's/.* ([0-9]+)\..*/\1/'
方式二
有些系统会没有 lsb_release 命令
lsb_release -a|grep -e Release|awk -F ":"'{ print $2 }' | awk -F "."'{print $1}' | sed's/[[:space:]]//g'
有空再对每个命令展开详解吧
