Actually you can, but you'd need to come from root user/process

root@MediaStore:~# su adm -s /bin/sh -c '/bin/ps xafu' | grep adm
adm      30424  0.0  0.0  12744  3140 ?        R    14:51   0:00          \_ /bin/ps xafu
root     30425  0.0  0.0   5712  2048 pts/0    S+   14:51   0:00          \_ grep adm

 

u changed shell to /bin/sh ... thats why it worked, try it with /bin/false

 

But i guess thats what u mean with if u come from root.

 

But he might  not understand thta dont confsue him

Edited December 6, 20187 yr by nuhll

10 hours ago, nuhll said:

"An emergent use of /bin/false, as you identified, is as a null shell for users not allowed to log in. The system in this case will behave exactly as though the shell failed to run."

https://serverfault.com/questions/519215/what-is-the-difference-between-sbin-nologin-and-bin-false

 

cheers for the link and explanation