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How can I log in with the su command in one line in the terminal? I know that the sudo command can do that:

echo [password] | sudo -S [command]

But when I try to imply it in the su command :

echo [password] | su [username]

I get en error:

standard in must be tty

I don't have access to the sudo account (so I can't access and edit the sudoers file).

I know that the right syntax is basically:

su [username]

What I want to do is to add a su command to aliases without being needed to enter password every time

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    you can't, the error message is pretty clear; see also larsks' answer here – don_crissti Jul 5 '16 at 10:52
  • The synatax is incorrect for su – LXGA Jul 5 '16 at 11:34
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The sytax is like so : su [username]. Press enter and now it will request the password for the user [username]

  • I know how to login with the su command. The problem is that I can't submit the password in the same line. Basically, what I want to achieve eventually, is to add to the aliases file a command such as: alias switch "echo [password] | su [username]" – user3561602 Jul 6 '16 at 10:17

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