Selectively deleting your bash history

It is possible and easy to selectively remove entries from your bash history (say, for commands involving a password), using the following commands:

history | grep <stuff I am looking for>
history -d <corresponding number>
history -w

If you want to delete the whole history:

history -c
history -w

The ‘w’ flag is necessary to write the changes to the history file (~/.bash_history) as this is done asynchronously.

Full details at Raw Syntax.