Backup System requrements

1. regularly test your backups

1. automate them

1. efficient

1. secure

1. redundant

1. consistent

Tools for documentation

1. tar

1. rsync

1. git

1. raid

1. LVM

Backup types

1. Application Types

1. File Data

1. Configuration files

1. System Data

How to reduce backup costs

1. compress

1. don't copy (use rsync)

1. throw stale data away

1. keep data well organized

1. prioritize

Backup system Architecture

1. store data in multiple sites

1. automate backup

1. automate restoration proccess