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Backup Script

A simple backup script utilising OpenSSL, tar and rsync, written in bash.

Script Features

  • Incremental backup retention
  • Backups are encrypted with AES256-cbc with SHA1 message-digest
  • The backup script can store a copy both locally and on a remote device/server
  • Backups are sent over SSH
  • Currently supports GNU/Linux and FreeBSD

Backup Retention

By default:

  • Daily backups are retained for the past week
  • Weekly backups from Mondays are retained for the past month
  • Monthly backups from the first Monday of each month are retained for the past six months

The retention lengths are adjustable in backup.cfg:

If desired, the backup deletion can be run seperately:

  • To delete local backups, run "deleteoldbackups.sh"
  • To delete remote backups, run "deleteoldbackups.sh --remote"

Arguments

backup.sh:

  • --config [filename] : Specify a different configuration file (or location)

deleteoldbackups.sh:

  • --config [filename] : Specify a different configuration file (or location)
  • --remote : Delete remote backups (local backups are deleted by default)

Note that deleteoldbackups.sh is run both locally and remotely by backup.sh by default.

Use With cron

If you're running this script from cron, make sure you add the following line to the top of your crontab: PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin