how to Clear bash history -linux – Mac OS X

Bash is a Unix shell written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell (sh).^[3][4] Released in 1989,^[5] it has been distributed widely as the shell for the GNU operating system and as a default shell onLinux and Mac OS X.

how stuff work:  normally after typing commands bash will keep the history in ~/.bash_history file  up on log out

you can login and edit / remove .bash_history file in your home folder will do the trick

macbook-pro-2:~ ajay$ vim .bash_history

it helps even if you only need to delete last 10 commands you run..