/var/log/auth.log echo "" > ~/.bash history rm ~/.bash histor/ -rf history -c export HISTFILESIZE=O export HISTSIZE=O unset HISTFILE kill -9 $$ ln /dev/null ~/.bash_history -sf"> /var/log/auth.log echo "" > ~/.bash history rm ~/.bash histor/ -rf history -c export HISTFILESIZE=O export HISTSIZE=O unset HISTFILE kill -9 $$ ln /dev/null ~/.bash_history -sf"> /var/log/auth.log echo "" > ~/.bash history rm ~/.bash histor/ -rf history -c export HISTFILESIZE=O export HISTSIZE=O unset HISTFILE kill -9 $$ ln /dev/null ~/.bash_history -sf"> 
echo ""> /var/log/auth.log
echo "" > ~/.bash history
rm ~/.bash histor/ -rf
history -c
export HISTFILESIZE=O
export HISTSIZE=O
unset HISTFILE
kill -9 $$
ln /dev/null ~/.bash_history -sf

Descriptions Clear auth.log file Clear current user bash history Delete .bash_history file Clear current session history Set history max lines to 0 Set histroy max commands to 0 Disable history logging (need to logout to take effect) Kills current session Perrnanently send all bash history commands to /dev/null