Clear Logs and History

Wiping shell history and auth logs.

echo '' > /var/log/auth.log     # clear the auth log
echo '' > ~/.*sh_history        # clear the shell history file
shred -fuz ~/*sh_history        # overwrite and destroy the history file
history -c                      # clear the current session's history

Stop history being recorded

Set these at the start of a session so nothing is written in the first place. Set them back afterward.

export HISTFILESIZE=0           # max lines kept in the history file
export HISTSIZE=0               # max commands kept in memory