Track Back around who execute your method

bash.ssh

# All users crontab. More http://www.thegeekstuff.com/2009/11/how-to-install-edit-or-remove-cron-jobs-in-batch-mode/
ls /var/spool/cron/crontabs/

# An array with a list of files who invoke to irrive in method inspected.
ruby method caller

# list all linux users
cat /etc/passwd

# list w/ filters
ls -l | grep 15 | awk -v x=9 '{print $x}'
#or
ls -l | grep 15 | awk '{print $9}'

# log ftp
tail -f /var/log/proftpd/proftpd.log