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shantanuo
Asked: 2011-10-12 20:41:15 +0800 CST

run a script on remote server

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I am trying to run a script on remote server as a root user. I have this line in my shell script.

cat /home/myuser/create_user_updated.sh |   ssh myuser@$myip "sudo sh"

I get the following error.

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

The script "create_user_updated.sh" works ok if copy the file to remote server and execute it there locally. But it does not work from remote server.

ssh sudo

2 Answers

  1. Best Answer

    You have two options:

    1. You can disable tty requirements by sudo: run visudo and either remove "requiretty" option globally if it is set, or on per-user basis:

      Defaults:username !requiretty

    2. You can force ssh to allocate pseudo-tty:

      ssh -t -t myuser@$myip "sudo sh"

      Note the double -t options, both are needed. Moreover, you need to add exit as a last line of your create_user_updated.sh script. Otherwise, ssh session might not end properly (because of the forced pseudo-tty creation).

    Please use option #2 only if you don't have root rights on the target machine, and cannot change sudo config. #1 is much more clean solution. In my opinion, enforcing tty via sudo does very little from security standpoint.

    • 8

  2. Use visudo to edit the /etc/sudoers file and insert the below line:

    Defaults:myuser !requiretty
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