lsof is part of ubuntu-standard and so is installed by default. I believe it's a design decision to generally not show command line utilities in Ubuntu Software. Therefore, I'm closing this bug.
** Changed in: gnome-software (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-software in Ubuntu. https://bugs.launchpad.net/bugs/1791227 Title: ubuntu software can't find "isof" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1791227/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs