Ubuntu Past Group Membership

I was in the process of installing Virtualbox day before yesterday (September 20, 2011); needed to add myself to the vboxusers group, but accidentally erased my group membership on Ubuntu –I feel retarded right now. It was a silly mistake really, I accidentally left out the “-a” (append) switch when I was trying to add myself to the vboxusers group.

A tail on /var/log/syslog file was not very helpful.

I feel sheepish 🙁

 phiri@phrlig001:~$ groups phiri
 phiri : admin vboxusers
 

After a couple of minutes looking around on the Web, I came across this article on StackExchange.

 root@phrlig001:/var/log# cat /var/backups/group.bak  | grep ":phiri"
 root:x:0:phiri
 adm:x:4:phiri
 dip:x:30:phiri
 netdev:x:110:phiri
 lpadmin:x:111:phiri
 admin:x:119:phiri
 sambashare:x:122:phiri
 tomcat6:x:125:phiri
 

A simple loop through the backup file did the trick 🙂

root@phrlig001:/var/log# for groupname in `sudo grep ":phiri" /etc/group- | awk -F ":" '{print $1}'`; do usermod -a -G $groupname phiri; done

It worked 😀

 root@phrlig001:/var/log# groups phiri
 phiri : admin root adm dip netdev lpadmin sambashare tomcat6 vboxusers
 
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