Bash history

• Auto-complete a command that you’ve made before:
1. Press the Ctrl and r keys at the same time.
2. Start typing the command. It will suggest the most recent match.
3. Continue typing the command until you have the match you want.
4. Press the Enter key.

• Check Bash history of a command:
• Type this command in a terminal window, replacing foo with the name of the command you’d like to check:

grep -a foo .bash_history

• Clear Bash history:
• Type this command in a terminal window:

history -c

• Display the last 500 commands you typed:
• Type this command in a terminal window:

history

• Select one of the last 500 commands you typed by number:
• Type this command in a terminal window, replacing n with the number of the command from the Bash history:

!n

Each command you enter changes the numbering of the last 500 commands, so check the list before choosing a number.

• Re-enter the last command
• Type this command in a terminal window:

!!

• Run the *most recent* command that starts with specific letters
• Type this command in a terminal window, replacing foo with the first few letters of the command you’re looking for:

!foo

• Search Bash history
• Use your up and down arrow keys to scroll through the Bash history.
• Or type this command im a terminal window, replacing foo with the command you’re looking for:

history | grep foo

Obligatory Happy Ending

And they all lived happily ever after. The end.