Unixcop explains the difference between "su" and "su -" commands in Linux.

Difference Between “su” and “su -” Commands in Linux

As a new Linux user, you may always face confusion regarding the difference between su command and su – command. This article will help you to understand the difference between “su” and “su -“ in Linux. Brief The su command used to switch to another user. 

Difference Between “su” and “su -” Commands in Linux - Unixcop