[root@iz2zegrz5db6q3qjj73jevz ~]# uname -a
Linux iz2zegrz5db6q3qjj73jevz 3.10.0-957.21.3.el7.x86_64 #1 SMP Tue Jun 18 16:35:19 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
[root@iz2zegrz5db6q3qjj73jevz ~]# uname -r
3.10.0-957.21.3.el7.x86_64
[root@iz2zegrz5db6q3qjj73jevz ~]# cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core)
[root@iz2zegrz5db6q3qjj73jevz ~]#