Backup script to run on cron or on demand

backup.zsh

# Destination directory where backups should be put
DEST_DIR="/media/bibhas/My Passport/Backup"

# List of directories to backup
# each directory in a new line
DIRS="/mnt/Works/
/etc/
/home/bibhas/
"

for d in $DIRS
do
    echo "Backing up $d"
    SLUG="$(echo -n "${d}" | sed -e 's/[^[:alnum:]]/-/g' | tr -s '-' | tr A-Z a-z)"
    tar --exclude="venv" -cjvf "$DEST_DIR/backup$SLUG`date +"%d-%b-%y"`.tar.bz" $d
done