Commands related to obtaining administrator permissions

1. sudo Use of commands

command	explain
sudo -s	Switch to root user , Get administrator privileges
sudo	The execution of a command requires administrator permission. You can add... Before the execution of the command sudo

• Sometimes it is sudo su
• If only one operation requires administrator permission, it is recommended to use sudo , That is, temporarily use manager permissions .
• If a large number of operations require administrator privileges sudo –s, However, the operation needs to be cautious .

2. whoami Use of commands

command	explain
whoami	View the current user limit

3. exit Use of commands

command	explain
exit	Logout user

• If it is the login user after switching , Exit will return to the last login account .
• If it's a terminal interface , Exit the current terminal .

4. who Use of commands

command	explain
who	See all the login users

5. passwd Use of commands

command	explain
passwd	Change user password , Do not specify a user. Change the password of the current login user by default

6. which Use of commands

command	explain
which	Check the command location

7. Use of shutdown and restart commands

command	explain
shutdown –h now	Turn off immediately.
reboot	restart