crontab cheat sheet

0001.crontab-dump.bash

#!/bin/bash
#
# (C)2020 Henri Shustak
# Released Under the MIT Licence
# https://mit-license.org/
#
# dump the crontab

user_name=$(whoami)
host_name=$(hostname)
day=$(date +%w)

# test that varable HOME is in your path if you run this via crontab
cron_dump_dir="$HOME/backup-config/crontab" 

# create the directory if it is not present
if ! [ -d $cron_dump_dir ] ; then mkdir -p $cron_dump_dir ; fi

# dump that crontab
cron_dump_file="${cron_dump_dir}/${host_name}-${user_name}-crontab-$day"
if [ -d "${cron_dump_dir}" ] ; then
  crontab -l > "${cron_dump_file}"
else
  echo "cron_dump_dir not avaialble : ${cron_dump_dir}"
  exit -99
fi