Is it possible to enable sudo -u only for specific users

sudo

I am trying to figure this out, but have not found a proper answer to this yet:

Is it possible to add a user to /etc/sudoers only with the rights to use sudo -u for specific users?

Yes you can specify the users in the sudoers file

To let youruser run any command as the user specificuser do this:

youruser      ALL = (specificuser)    ALL

Try running script /dev/null as the user you su to before launching screen - its a ghetto little hack, but it should make screen happy.

You should be able to do:

Cmnd_Alias                NOTTYCMDS = /path/to/cmd1, /path/to/cmd2
Defaults!NOTTYCMDS        !requiretty