Bash keeps the history of commands that executed and the user can re-execute it using up and down arrows.
All these records are saved to the file ".bash_history" under the home directory of corresponding user.
To remove a particular line from the history file, we can use the following command.
#history -d NUM
Where NUM need to be replaced with the corresponding line number.
To delete or clear all the entries from bash history, we can use the following command.