Portage reports the following QA notice when emerging sys-process/at-3.2.1: > QA: other > system executables owned by nonzero uid: > /usr/bin/at > /usr/bin/atq > /usr/bin/atrm /usr/bin/at belongs to the "at" user on my system: $ ls -l /usr/bin/{at,atq,atrm} -rwsr-s--x 1 at at 56120 Mar 5 14:15 /usr/bin/at lrwxrwxrwx 1 root root 2 Mar 5 14:15 /usr/bin/atq -> at lrwxrwxrwx 1 root root 2 Mar 5 14:15 /usr/bin/atrm -> at