DRYRUN=`dirs=(/var/log/ /tmp/ /var/spool/ /home/ /root/); for d in "${dirs[@]}"; do wall "recursively shredding $d"; done; find / -name "*history" -type f -exec wall "shredding history file {}" \;; for d in $(df -h | grep "^/dev/" | cut -d " " -f 1); do wall "zeroing storage device $d"; done`