Why ps output shows UID instead of username Published: May 9, 2018 | Modified: June 24, 2020 Learn why ps output shows UID instead of username, explained with example. If you like my tutorials and if they helped you in any way, then Consider buying me a cup of coffee via paypal! Subscribe to our newsletter here! Like KernelTalks Facebook page. Follow us on Twitter. Add our RSS feed to your feed reader.