vigr

 edit /etc/group via vigr: 

How to use vigr? 

like this: 

id user

uid=1012(user) gid =1012(user) groups=1012(user)

vigr= editor vi at /etc/group - syntax is the same as in vi

- edit: add user user to group admins  

id user

id user

uid=1012(user) gid =1012(user) groups=1012(user), 1019(admins)