Linux "cover your tracks" Commands

Question 1

Clear auth.log file

Answer 1

echo “” > /var/log/auth.log

Question 2

Clear current user bash history

Answer 2

echo “” > ~/.bash_history

Question 3

Delete .bash_history file

Answer 3

rm ~/.bash_history -rf

Question 4

Clear current session history

Answer 4

history -c

Question 5

Set history max lines to 0

Answer 5

export HISTFILESIZE=0

Question 6

Set history max commands to 0

Answer 6

export HISTSIZE=0

Question 7

Disable history logging (need to logout to take effect)

Answer 7

unset HISTFILE

Question 8

Kills current session

Answer 8

kill -9 $$

Question 9

Permanently send all bash history commands to /dev/null

Answer 9

ln /dev/null ~/.bash_history -sf