All I need to do is to run a specific script as a particual user who does have the nologin/false shell indicated in /etc/passwd.
I would run the script as root and this should run as another user. Running :~# su -c "/bin/touch /tmp/test" testuser would work but I need a valid shell for the testuser. I know I can disable the password with passwd -d testuser and leave the shell to /bin/bash this way would secure a little bit but I need to have nologin/false shell.
Basically what I need is what crontab does when we set jobs to be running as a particular user, regardless this one has nologin/false shell.
p.s I found this thread Executing a command as a nologin user but I have no idea how to "concatenate" the command su -s /bin/sh $user to the script I need to run