My Unix config files and shell scripts, optimized for Fedora, Debian, macOS and Windows (in that order).
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#!/usr/bin/env python3
"""backup-check: Periodically compare checksums of backups in multiple
locations. It's mainly to do a weekly check of all my backup locations and
identify bit rot before it's too late.
Install via `crontab -e`:
0 2 * * 0 /home/noah/bin/backup-check
--Kirsle
http://sh.kirsle.net/
"""
import codecs
import os.path
import subprocess
# Directories to compare with each other.
DIRECTORIES = [
"/mnt/Midnight/Images/Organized",
"/run/media/noah/Cyro/Pictures/Organized",
"/run/media/noah/Obelisk/Redundant/Images/Organized",
"/home/noah/Dropbox/Photos/Organized",
"/home/noah/ownCloud/Photos/Organized",
]
ERROR_OUT = "/home/noah/Desktop/Checksum Error.txt"
def main():
# First available disk becomes the common denominator.
master = None
for disk in DIRECTORIES:
if os.path.isdir(disk):
if master is None:
print("Master disk chosen as:", disk)
master = disk
if disk != master:
# Do the comparison.
print("Compare {} <=> {}".format(master, disk))
out = subprocess.check_output(["diff", "-aqr", master, disk])
if len(out):
# Problem!
error(out)
break
def error(out):
"""Error, panic!"""
fh = codecs.open(ERROR_OUT, "w", "utf-8")
fh.write(out.decode("utf-8"))
fh.close()
if __name__ == "__main__":
main()