Could not resolve host: mirrorlist.centos.org Centos 7 when using "yum update"I have a fresh install of centos 7.[root@localhost ~]# cat /etc/centos-release CentOS Linux release 7.4.1708 (Core) [root@localhost ~]# When I tried to update with yum, I saw that yum is giving error.[root@localhost ~]# yum update Loaded...