Maybe it's time. After using Ubuntu and Debian for years, I now officially want to switch to Cent OS. More on this topic later. For today's post, I will just go over how to install ssh server and enable it at boot time.
To install ssh server on Cent OS, simply run
# yum install openssh-server
Unlike Ubuntu, where ssh server will be automatically started at boot time, Cent OS seems that one must manually do so. For one time start, run
# service sshd start
However, if you want your ssh server to keep running even after reboot or restart, run
# chkconfig sshd on
Created symlink from /etc/systemd/system/multi-user.target.wants/sshd.service to /usr/lib/systemd/system/sshd.service.
That's all. If you want to turn it off, then
# chkconfig sshd off
Note: Forwarding request to 'systemctl disable sshd.service'.
Removed symlink /etc/systemd/system/multi-user.target.wants/sshd.service.
Enjoy Cent OS!