February 2003
Intermediate to advanced
986 pages
35h 34m
English
book
Practical UNIX and Internet Security, 3rd Edition
by Simson Garfinkel, Gene Spafford, Alan Schwartz
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Chapter 18: Backups
Make regular backups.
Be certain that everything on your system is backed up.
Formulate a written backup plan. Remember to update your plan whenever you update your system or change its configuration.
Make paper copies of critical files for comparison or rebuilding your system (e.g., /etc/passwd, /etc/rc, and /etc/fstab).
Make at least every other backup onto a different tape to guard against media failure.
Do not reuse a backup tape too many times because the tapes will eventually fail.
Try to restore a few files from your backups on a regular basis.
Make periodic archive backups of your entire system and keep them forever.
Try to completely rebuild your system from a set of backups to be certain that your backup procedures are complete.
Keep your backups under lock and key.
Do not store your backups in the same room as your computer system: consider offsite backup storage.
Ensure that access to your backups during transport and storage is limited to authorized and trusted individuals.
If your budget and needs are appropriate, investigate doing backups across a network link to a “hot spare” site.
Encrypt your backups, but escrow the keys in case you lose them.
When using software that accesses files directly rather than through the raw devices, consider remounting the filesystems as read-only during backups to prevent changes to file access times.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.