I am using Ubuntu 10.04 and have installed openssh-server.
How do I disable/enable it from being started at boot time?
Apparently it is not done with
# chkconfig --list|grep -i ssh ssh 0:off 1:off 2:off 3:off 4:off 5:off 6:off #
This should be enough, even if you're using upstart (dependency-base booting):
I didn't know Ubuntu included chkconfig by default, that's pretty interesting - Debian doesn't.
See the comment below on how to remove startup links - I'm not sure that works when using upstart though.
There is not command I know of that can disable upstart jobs, but you can manually disable services by editing the corresponding Upstart configuration files. To stop SSHd from starting at boot time, comment out the line