CentOS 7 and RHEL 7 new commands

In CentOS 7/RHEL 7 the 'service' command has now been changed to systemctl. Now the command are:
systemctl start sshd.service 
The above line will start sshd service.

systemctl restart sshd
The above line is a short form command.

chkconfig command has also changed.

Now to enable service during boot is:
systemctl enable sshd
To disable service during boot is:
systemctl disable sshd

To check startup list:
systemctl list-unit-files --type=service