Quit Bash Shell Without Saving Bash History

Sometimes it is very useful to delete / remove Bash history partially or completely when log out. Here is my favourite methods howto log out / quit / exit Bash shell without saving Bash history.

Remove Only Current Session Bash History and Leave Older History Untouched

1. Quit Bash Shell Without Saving History: Unset HISTFILE



# unset HISTFILE && exit



2. Quit Bash by Killing you Current Consolel Without Saving History: Kill Console



# kill -9 $$



3. Quit Bash Shell Without Saving History: Clear History Option



#history -c && exit



4. Set your Bash Shelll history to Zero(0):  Set HISTSIZE 0



#HISTSIZE=0 && exit

Remove/Delete Bash History Completely

1. Quit Bash Shell Without Saving History: Delete HISTFILE and Unset HISTFILE



#rm -f $HISTFILE && unset HISTFILE && exit

If you want make these commands more permanent then these commands could be added on ~/.bash_logout file or used with aliases.

echo "alias nohistory='history -c && exit'" >> ~/.bash_logout