This behaviour is deliberate. From 'man fuser': "fuser outputs only the PIDs to stdout, everything else is sent to stderr."
** Changed in: psmisc (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/575156 Title: fuser output is scattered between stderr and stdout To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/psmisc/+bug/575156/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs