SHELL

ubuntu add user to group

sudo usermod -a -G group username

add user to group

usermod -a -G examplegroup exampleusername

how to add new group to user linux

usermod -a -G groupname 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

command to add a user to a group

sudo usermod -a -G GROUP USER

linux add user to group

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

create new users and add them in group in linux

useradd -mg [groups] [username]

bash add user to group

sudo dseditgroup -o edit -t user -a <user> <group>  # OSX 

linux user groups

 groups $username

linux change user and group

chown USER:GROUP FILE

add user to group

usermod -a -G <group> <user>
$ usermod -a -G developer tom

What is user and group in linux?

User: the owner of the file (person who created the file).
Group:the group can contain multiple users. Therefore, all users in that group will have the same permissions. It makes things easier than assign permission for every user you want.

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