When uninstalling on Ubuntu 14.04 there are some errors: Removing konsole-trinity (4:14.0.0-r1865-0ubuntu14.04.0+pr185) ... /var/lib/dpkg/info/konsole-trinity.prerm: 22: /var/lib/dpkg/info/konsole-tr= inity.prerm: /usr/sbin/update-alternatives: not found dpkg: error processing package konsole-trinity (--purge): podproces nain=B9talovan=FD skript pre-removal vr=E1til chybov=FD k=F3d 12= 7 Removing ksmserver-trinity (4:14.0.0-r1865-0ubuntu14.04.0+pr185) ... /var/lib/dpkg/info/ksmserver-trinity.prerm: 22: /var/lib/dpkg/info/ksmserve= r-trinity.prerm: /usr/sbin/update-alternatives: not found dpkg: error processing package ksmserver-trinity (--purge): podproces nain=B9talovan=FD skript pre-removal vr=E1til chybov=FD k=F3d 12= 7 Removing twin-trinity (4:14.0.0-r1865-0ubuntu14.04.0+pr185) ... /var/lib/dpkg/info/twin-trinity.prerm: 22: /var/lib/dpkg/info/twin-trinity.= prerm: /usr/sbin/update-alternatives: not found dpkg: error processing package twin-trinity (--purge): podproces installed script pre-removal returned error code 127 There are some errors during uninstall: konsole-trinity ksmserver-trinity twin-trinity There may be some other errors. update-alternatives is in /usr/bin and not in /usr/sbin $ whereis update-alternatives update-alternatives: /usr/bin/update-alternatives /usr/bin/X11/update-alter= natives /usr/share/man/man8/update-alternatives.8.gz Thanks. OR