1. 查看内核版本命令：
[root@yepk ~]# cat /proc/version
Linux version 3.10.0-693.2.2.el7.x86_64 (builder@kbuilder.dev.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) ) #1 SMP Tue Sep 12 22:26:13 UTC 2017
[root@yepk ~]# uname -a
Linux izm5e4rcnszm8kepmdfav2z 3.10.0-693.2.2.el7.x86_64 #1 SMP Tue Sep 12 22:26:13 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
[root@izm5e4rcnszm8kepmdfav2z ~]# uname -r
3.10.0-693.2.2.el7.x86_64
2. 查看linux版本：
登录到服务器执行 lsb_release -a ,即可列出所有版本信息:
[root@yepk ~]# lsb_release -a
LSB Version: :core-4.1-amd64:core-4.1-noarch
Distributor ID: CentOS
Description: CentOS Linux release 7.4.1708 (Core)
Release: 7.4.1708
Codename: Core
注:这个命令适用于所有的linux，包括Redhat、SuSE、Debian等发行版。
登录到linux执行cat /etc/issue:
[root@yepk ~]# cat /etc/issue
Red Hat Enterprise Linux AS release 4 (Nahant Update 2)
Kernel \r on an \m
登录到linux执行cat /etc/redhat-release ,例如如下:
[root@q1test01 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux AS release 4 (Nahant Update 2)
注:这种方式下可以直接看到具体的版本号，比如 AS4 Update 1
登录到linux执行rpm -q redhat-release ,例如如下:
[root@q1test01 ~]# rpm -q redhat-release
redhat-release-4AS-3
注:这种方式下可看到一个所谓的release号，比如上边的例子是3
这个release号和实际的版本之间存在一定的对应关系，如下：
redhat-release-3AS-1 -> Redhat Enterprise Linux AS 3
redhat-release-3AS-7.4 -> Redhat Enterprise Linux AS 3 Update 4
redhat-release-4AS-2 -> Redhat Enterprise Linux AS 4
redhat-release-4AS-2.4 -> Redhat Enterprise Linux AS 4 Update 1
redhat-release-4AS-3 -> Redhat Enterprise Linux AS 4 Update 2
redhat-release-4AS-4.1 -> Redhat Enterprise Linux AS 4 Update 3
redhat-release-4AS-5.5 -> Redhat Enterprise Linux AS 4 Update 4
另:第3)、4)两种方法只对Redhat Linux有效.
查看系统是64位还是32位:
- getconf LONG_BIT or getconf WORD_BIT
- file /bin/ls
- lsb_release -a