查看linux内核版本（3个查看Linux内核版本命令）教程方法

[root@mail ~]# uname -a
3.10.0-957.el7.x86_64 #1 SMP Thu Nov 8 23:39:32 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
[root@mail ~]# 

[root@mail ~]# cat /proc/version
Linux version 3.10.0-957.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) ) #1 SMP Thu Nov 8 23:39:32 UTC 2018
[root@mail ~]# 

[root@mail ~]# cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core) 
[root@mail ~]#