Update CentOS 7

cat /etc/centos-release

[root@localhost ~]# cat /etc/centos-release CentOS Linux release 7.2.1511 (Core)

 

[root@localhost ~]# yum check-update

 

[root@localhost ~]# yum update

 

[root@localhost ~]# reboot

 

[root@localhost ~]# cat /etc/centos-release CentOS Linux release 7.4.1708 (Core)