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