Running script commands after SSH

Question

I need to write a script that will SSH into a remote host, then run certain commands on that remote host, then exit. If I just do

ssh $host

#some command

the script will SSH in, wait until I manually exit, then run the commands.

How do I run those commands on the remote host?

Answer 1

ssh $host 'command1; command2; command3'

or if you have just one command:

ssh $host command1

or if you have many commands (a script file):

cat file | ssh $host sh