User Switching:
- su Username: incomplete switching environment variable does not switch, or the original user information
- su - Username: -l, complete switch, switch to the new user environment variables, and custom switching to a new user's home directory
- su - username -c "command": using the specified user executes a command, finished retreat back to the original user
Password Tools:
- passwd: change the user password
- change: change the password policy (expiration time, etc.)
- chpasswd: Quick, bulk change passwords
su - username -c "command": using the specified user executes a command, finished retreat back to the original user
passwd: change the user password
Non-interactive Change Password: echo password | passwd --stdin user
chpasswd: Batch Change Password
chage: Modify User Password Policy
After a review of modifying the configuration file:
