SHELL

linux change username

# login as root and make sure that there are no active processes for user
usermod -l NEW_USERNAME OLD_USERNAME
# if user is running kill user w the following command
userUID=$(id -u OLD_USERNAME) && pkill -U $userUID

change user linux

sudo su - username

linux change user in terminal

$ whoami
user1
$ su - user2
Password:
$ whoami
user2
$ exit
logout

Changing user shell in linux

sudo chsh -s /bin/zsh <username>

Command to Change Users in a Linux

$ sudo -u <user> <command>