Disable SU access for sudo users

Some times you need to disable sudo su – access on your environment so that the users will use sudo command always and they will not switch to any other users account unnecessarily

Lets see how to do it

• Edit the /etc/suoders by running visudo

  visudo

• Add the below Command Alias

  Cmnd_Alias BLOCKSU = /bin/su

• If you want to block SU for only a particular user, you can use the below entry.

  user1 ALL=(ALL) NOPASSWD: ALL, !BLOCKSU

• If you want to block it for all the users via a group like wheel, Then the below entry change will do the job

  %wheel ALL=(ALL) ALL

  to

  %wheel ALL=(ALL) ALL, !BLOCKSU

  Update: This is not a bulletproof solution, You can find ways to bypass this in the comment section.