control+a moves to the beginning of the terminal
control+e to move to the end of the terminal
control+k delete everything after the terminal cursor
control+d delete a single character after the cursor
control+b move the cursor forward
control+f move cursor backward
control+p previous command
control+l clear screen=clear
history
-c clears the entire command history
-d 500 delete clause 500
-d 510 3 delete three entries starting from 510
-w save to history file
Command History Tricks! n : execute n commands
!-n : Execute up to the nth command
! ! : execute the previous command
! + string: the most recent command in the command history that begins with the specified string
! $ : refer to the last parameter of the previous command ================= esc .================alt+.
environment variable
PATH
HISTSIZES Number of history entries for bash