sudo find / -path /proc -prune -o -user egg -ls

sudo find / -path /proc -prune -o -group dev -ls

root:x:0:0:root:/root:/bin/false
daemon:x:1:1:daemon:/usr/sbin:/bin/sh
man:x:6:12:man:/var/cache/man:/bin/sh
www-data:x:33:33:www-data:/var/www:/bin/sh
libuuid:x:100:101::/var/lib/libuuid:/bin/sh
syslog:x:101:103::/home/syslog:/bin/false
messagebus:x:102:105::/var/run/dbus:/bin/false
whoopsie:x:103:108::/nonexistent:/bin/false
landscape:x:104:110::/var/lib/landscape:/bin/false
mysql:x:106:114:MySQL Server,,,:/nonexistent:/bin/false
bind:x:107:115::/var/cache/bind:/bin/false
egg:x:1002:1002::/home/pincoin:/bin/bash

lp:x:7:7:lp:/var/spool/lpd:/bin/sh
mail:x:8:8:mail:/var/mail:/bin/sh

bin:x:2:2:bin:/bin:/bin/sh
sys:x:3:3:sys:/dev:/bin/sh
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/bin/sh
news:x:9:9:news:/var/spool/news:/bin/sh
uucp:x:10:10:uucp:/var/spool/uucp:/bin/sh
proxy:x:13:13:proxy:/bin:/bin/sh
backup:x:34:34:backup:/var/backups:/bin/sh
list:x:38:38:Mailing List Manager:/var/list:/bin/sh
irc:x:39:39:ircd:/var/run/ircd:/bin/sh
gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/bin/sh
nobody:x:65534:65534:nobody:/nonexistent:/bin/sh
sshd:x:105:65534::/var/run/sshd:/usr/sbin/nologin

sudo userdel games
sudo userdel news
sudo userdel uucp
sudo userdel proxy
sudo userdel backup
sudo userdel list
sudo userdel irc
sudo userdel gnats