Linux commands

Add user celladmin with su access

add below using visudo

visudo

celladmin  ALL=(ALL)       NOPASSWD: ALL


Now to  test

login as celladmin user

type

sudo -s


To set password not expire

password unexpire

chage -l celladmin

chage -I -1 -m 0 -M 99999 -E -1 celladmin


add user to sudo with no password

oracle ALL=(root)  NOPASSWD:  /bin/su -