CentOS系统基本命令

1.系统版本的查询

[root@master ~]# cat /etc/redhat-release
CentOS release 6.9 (Final)

[root@master ~]# cat /etc/issue
CentOS release 6.9 (Final)
Kernel \r on an \m

2.内核版本的查询

[root@master ~]# cat /proc/version
Linux version 2.6.32-696.16.1.el6.x86_64 (mockbuild@c1bl.rdu2.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-18) (GCC) ) #1 SMP Wed Nov 15 16:51:15 UTC 2017

[root@master ~]# uname -a
Linux master 2.6.32-696.16.1.el6.x86_64 #1 SMP Wed Nov 15 16:51:15 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

3.下载yum依赖包，制作本地yum源。

yum install yum-plugin-downloadonly
yum install --downloadonly gcc zlib zlib-devel openssl-devel（未成功过）

yum install yum-utils -y

yumdownloader gcc zlib zlib-devel openssl-devel

yumdownloader gcc zlib zlib-devel openssl-devel --resolve --destdir=/root/package/ssh