[SOLVED] how to enable/disable ssh server,at and not at boot time?

wang · 03-01-2011, 05:19 AM

hi,friends!
i have just installed ssh-server in my Ubuntu 10.04,and really want to know how to
enable/disable it,and i also want to be sure if the changes will take effect after the next boot or not,and how to do that?
thanks for your help.

repo · 03-01-2011, 05:25 AM

To stop ssh server:

Code:

# sudo /etc/init.d/ssh stop

To start sshs server:

Code:

# sudo /etc/init.d/ssh start

To restart ssh server:

Code:

# sudo /etc/init.d/ssh restart

Kind regards

wang · 03-01-2011, 05:35 AM

thanks.But what is the difference between "sudo /etc/init.d/ssh start" and "sudo /etc/init.d/ssh restart" ?

tva · 03-01-2011, 05:44 AM

start starts server and restart first stops and then starts server. If your server isn't running it doesn't matter which command you use.

repo · 03-01-2011, 06:04 AM

start will start the ssh daemon, if the daemon doesn't run
restart will stop/restart the daemon, if the daemon is already running

Kind regards

linuxrndblog · 03-01-2011, 08:05 AM

run following command:

chkconfig sshd on (for on boot time start)
chkconfig sshd off (for on boot time stop)

Juako · 03-01-2011, 08:35 PM

Quote:

Originally Posted by linuxrndblog

run following command:

chkconfig sshd on (for on boot time start)
chkconfig sshd off (for on boot time stop)

Those commands are for red hat based systems, for example CentOS. In debian based systems the equivalent would be:

Code:

update-rc.d ssh defaults
update-rc.d ssh remove

For manual starting/stopping, with upstart based systems (newer ubuntus for example) you can use

Code:

service ssh start/stop/restart/reload

before upstart the "correct" way at least in ubuntu was

Code:

invoke-rc.d ssh start/stop/restart/reload

But invoking the script directly works across all variants:

Code:

sh /etc/init.d/ssh start/stop/restart/reload

wang · 03-02-2011, 07:00 AM

one more confusion:
by

Code:

sudo update-rc.d sshd defaults

i got

nuli@nuli-laptop:~$ sudo update-rc.d sshd defaults
update-rc.d: /etc/init.d/sshd: file does not exist

what does this mean? Have i really installed ssh server?i can successfully login to localhost by "sudo ssh localhost" .
thanks!

Juako · 03-02-2011, 07:57 AM

Quote:

Originally Posted by wang

one more confusion:
by

Code:

sudo update-rc.d sshd defaults

i got

nuli@nuli-laptop:~$ sudo update-rc.d sshd defaults
update-rc.d: /etc/init.d/sshd: file does not exist

My bad, note in my post that i refer to the debian init.d script as "ssh", except in the update-rc.d example where i mistype it as "sshd". I'll correct the post.

Try

Code:

sudo update-rc.d ssh defaults

I bet it'll work then.