bash - running remote script from local machine

Question

I tried this:

#!bin/bash
ssh [email protected]  'sudo /etc/init.d/script restart'

But I get this error:

sudo: no tty present and no askpass program specified

How can I run that script? Now when I need to run that script I do these steps:

ssh [email protected]
sudo /etc/init.d/script restart

But I don't want to manually log in to remote server all the time and then enter restart command.

Can I write local script that I could run so I would only need to enter password and it would run remote script and restart the process?

Ask your sysadmin to give you the privilege to run sudo /etc/init.d/script without a password. If you're the sysadmin, see man visudo and man sudoers — glenn jackman
– glenn jackman, Commented Sep 3, 2014 at 13:28

anubhava · Accepted Answer · 2014-09-03 12:47:37Z

4

You can use -t option in ssh command to attach a pseudo-tty with your ssh command:

ssh -t -t [email protected] 'sudo /etc/init.d/script restart'

As per man ssh:

-t Force pseudo-tty allocation. This can be used to execute arbitrary screen-based programs on a remote machine, which can be very useful, e.g. when implementing menu services. Multiple -t options force tty allocation, even if ssh has no local tty.

answered Sep 3, 2014 at 12:47

anubhava

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3 Comments

Andrius Over a year ago

Today I noticed strange thing. When I execute that command from my local machine, I see normal message that remote server restarts and everything is fine, but actually that server goes down for some reason. If I restart normally from remote server, it restarts normally. Why could this happen?..

Andrius Over a year ago

Oh and after using remote restart command, when I use that command directly from that server, it gives this message: failed to kill 2190: No such process. So for some reason it kills process instead of restarting.

anubhava Over a year ago

I guess that kiil command would be part of your /etc/init.d/script

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