bash_notes.txt

In Bash

There are several shortcuts key that help speed your command typing!

Ctrl + a = Moves your cursor to the start of the line
Ctrl + e = Moves it to the end
Ctrl + u = Remove all the texts before your cursor
Ctrl + d = Ends a line or delete a character after the cursor
Ctrl + n = Searches the command history downwards
Ctrl + p = Searches the command history upwards
Ctrl + d = signal bash that there is no more input
Ctrl + l = redraw the screen

Some shortcuts!!!
!! = reuse the command typed
eg. 
apt update
sudo !! will run sudo apt update

Commands Example
pushd/popd - put working directory on a stack
file - determine file type
whatis - display the on-line manual descriptions
apropos - search the manual page names and descriptions
more/less - file perusal filter for crt viewing
users - print the user names of users currently logged in
id - print real and effective user and group IDs
killall - kill processes by name