Check SU binary
Check SU binary existence
The su command lets you switch the current user to any other user. If you need to run a command as a different (non-root) user, use the –l [username] option to specify the user account. Additionally,su can also be used to change to a different shell interpreter on the fly.
su is an older but more fully-featured command. It can duplicate the functionality of sudo by use of the –c option to pass a single command to the shell. A variation on the checking for SU, this attempts a 'su' binary check on following location.