How can we find a group to which a particular user belongs to in ubuntu
we have 2 methods using which we can find it.

Method 1

root@chavakula:/# id -Gn user
output will as given below
root sys www-data


Method 2

root@chavakula:/# groups ubuntu
output will as given below
ubuntu : ubuntu root adm dialout cdrom floppy sudo audio dip www-data video plugdev netdev lxd


* Note that Method 2 is deprecated! may be removed from future releases