[Koha] sudo -u koha zebrasrv -f /etc/koha/koha-conf.xml

when I run this command ' sudo -u koha zebrasrv -f /etc/koha/koha-conf.xml' It show the following error. how can I fix it sudo -u koha zebrasrv -f /etc/koha/koha-conf.xml sudo: no passwd entry for koha! plz help in this regard