cat /var/lib/dpkg/statoverride
root postdrop 2555 /usr/sbin/postdrop
root lp 775 /var/log/hp/tmp
root postdrop 2555 /usr/sbin/postqueue
root mlocate 2755 /usr/bin/mlocate
postfix postdrop 2710 /var/spool/postfix/public
redis redis 640 /etc/redis/redis.conf
root root 4755 /usr/sbin/mount.davfs
root root 1733 /var/lib/php/sessions
hplip root 755 /var/run/hplip
root ssl-cert 710 /etc/ssl/private
root crontab 2755 /usr/bin/crontab
root@ubuntu:/# cat /etc/groups
cat: /etc/groups: No such file or directory