You have installed chkrootkit and it's now running with daily cron, but unless you are logging in daily to check the logs, you won't know of any potential problems. Here's a simple way to have the daily report emailed to you with only postfix installed, using the sendmail command. Edit /etc/chkrootkit.conf and add the following REPORT_EMAIL="
[email protected]" Edit /etc/cron.daily/chkrootkit and towards the bottom of the file, replace $CHKROOTKIT $RUN_DAILY_OPTS with $CHKROOTKIT > $LOG_DIR/chkrootkit.log #Run chkrootkit and save the logfile ( echo "Subject: [chkrootkit] $(hostname -f) - Daily