How to sudo on a computer using ssh inside a bash script

Question

I'm trying to run a bash script that has:

ssh -l <username> <compname> 'sudo yum -y install expect'

I get the error:

sudo: sorry, you must have a tty to run sudo

on some computers but on others the process runs smooth. How can I prevent this?

The question is programming related because it is in a script. That is enough to make it valid for SO. No mere user would need to know this. — Stu Thompson
– Stu Thompson, Commented Oct 31, 2009 at 10:25

dave4420 · Accepted Answer · 2009-10-31 10:17:43Z

22

Use the -t flag to force a tty to be allocated:

ssh -t -l <username> <compname> 'sudo yum -y install expect'

answered Oct 31, 2009 at 10:17

dave4420

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