[root@localhost ~]# subscription-manager: command not found
-bash: -bash:: command not found
resolution:
wget -O /etc/yum.repos.d/epel-rhsm.repo http://repos.fedorapeople.org/repos/candlepin/subscription-manager/epel-subscription-manager.repo
yum install subscription-manager -y
refer to: https://serverfault.com/questions/506148/is-subscription-manager-available-for-centos