Using and Administering Linux, Volume 3 by 2023

Author:2023
Language: eng
Format: epub

Chapter 47 BaCk Up everything – FreqUently

Delete the cpuhog program from /root.

Start Midnight Commander (MC) in a root terminal and use one pane to view the contents

of the backup.tgz tarball. Just highlight the tarball with the Midnight Commander cursor

and press Enter just like you would for any directory. it will take some time to load and uncompress the tarball – 30 seconds or so depending upon your physical host. you can then

navigate around the contents of the tarball just as if it were a filesystem on your vM – and

in one sense it is because it is just contained inside a single archive file. locate the /root directory in the tarball.

in the other pane of MC, navigate to the actual /root directory if it is not already the pWD for that pane. locate the archive file /root/backup.tgz, highlight it, and copy it to /root using the F5

key. When you see the Copy dialog box, just press Enter to do the copy.

it is very easy to navigate through archive files using MC and many other file managers, in

order to find and extract a single file.

exit from MC using F10 and make root’s home directory the pWD.

Off-Site Backups

Creating good backups is an important first step in a backup strategy. Keeping the

resulting backup media in the same physical location as your original data is a mistake

although we have done that in the previous experiments for experimental purposes.

We have seen that theft of a computer that has all its backups on an internal drive can

result in the complete and irrecoverable loss of important data. Fire and other disasters

can also result in the loss of original data and the backup data if it is stored in the same

location. Fireproof safes are one option that can reduce the threat from both theft and

a disaster like fire. Such safes are usually rated in minutes at specified temperatures for

which they are supposed to protect their contents. I guess my personal concern here is

that I have no idea how long or hot a fire will burn. Perhaps the safe will hold out long

enough, but what if it doesn’t?

I prefer to do for my own backups what the large companies do. I keep current off-

site backups. For me this is in the safe deposit box at my credit union. For others this

might be “in the cloud” somewhere. I like the end-to-end control I have with my safe

deposit box solution. I know it is well protected. If my little home office is destroyed, the 205

Chapter 47 BaCk Up everything – FreqUently

credit union is likely far enough away that it will not be affected by whatever disaster

occurred. If a disaster affects both my house and the credit union, I won’t be worrying

about my computers any time soon.

For large companies there are services that store your backups in a remote, high-

security location with climate-controlled vaults. Most of these services will even send

armored trucks to your facilities to pick up and transport your backup media. Some

provide high-speed network connections so that backups can be made directly onto

their own storage media at their remote locations.

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