SHELL

ubuntu add user to group

sudo usermod -a -G group username

add user to group linux

sudo usermod -aG <groups> <username>

ubuntu add user to group

sudo usermod -aG groupName userName

# restart or just run
newgrp groupName

group of user ubuntu

groups <username>

linux add user to group

sudo groupadd $GROUP 
sudo usermod -aG $GROUP $USER

add users in group ubuntu

#!/bin/bash



while [ x$username = "x" ]; do



read -p "Please enter the username you wish to create : " username



if id -u $username >/dev/null 2>&1; then



echo "User already exists"



username=""



fi



done



while [ x$group = "x" ]; do



read -p "Please enter the primary group. If group not exist, it will be created : " group



if id -g $group >/dev/null 2>&1; then



echo "Group exist"



else



groupadd $group



fi



done



read -p "Please enter bash [/bin/bash] : " bash



if [ x"$bash" = "x" ]; then



bash="/bin/bash"



fi



read -p "Please enter homedir [/home/$username] : " homedir



if [ x"$homedir" = "x" ]; then



homedir="/home/$username"



fi



read -p "Please confirm [y/n]" confirm



if [ "$confirm" = "y" ]; then



useradd -g $group -s $bash -d $homedir -m $username



fi