Special Chars: Bang Bang (!!)
The bang bang command is a shortcut to repeat the immediate previous commmand entered in the terminal
Often it is used to run the previous command as sudo.
Running the previous command
After running a command, you can use !! to run it again
Running the previous command in Sudo
After running a command, you can use sudo !! to run it again as sudo user
chown: me.jpg: Operation not permitted
luke@nebulae:~$ sudo !!
sudo chown 777 me.jpg