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- Newsgroups: comp.os.linux
- Path: sparky!uunet!utcsri!torn!nott!dgbt!sirius!gilles
- From: gilles@dgbt.doc.ca (Gilles Gagnon)
- Subject: Re: Q: Poor person's backup
- Message-ID: <1992Nov6.204658.5044@dgbt.doc.ca>
- Keywords: backup
- Sender: news@dgbt.doc.ca (News user)
- Reply-To: gilles@dgbt.doc.ca
- Organization: The Communications Research Centre
- Date: Fri, 6 Nov 92 20:46:58 GMT
- Lines: 98
-
-
- Thanks to all those who sent me information on how to perform a backup
- of a linux system. Following are the details I got regarding the possible
- procedures one can use to backup his/her system when no tape drive is
- available.
-
- --------
- --------
-
- From: Philip Perucci <dsc3pzp@nmrdc1.nmrdc.nnmc.navy.mil>
-
- To backup, get cpio. Works GREAT. I like the one DIRECTLY from the
- nice people at GNU, prep.ai.mit.edu (/pub/gnu). The file is "cpio*"
- - just go to dir and do "dir cpio*" to get filename. Down-load it,
- make it (yes...its clean!) and run it.
-
- To backup: find X -print -depth | cpio -o -O /dev/fd0
- (where X = root directory of tree to backup)
- To restore: cpio -i -I /dev/fd0
- To examine
- contents
- of backup: cpio -it -I /dev/fd0
- (no files restored, just a list to CRT)
-
- Its beautiful: You are prompted for floppies as required. You can
- get GNU cpio from a number of sites, I happen to
- favor the source.
-
- --------
-
- From gulasch!elmar@mcshh.Hanse.DE Wed Nov 4 18:31:00 1992
-
- that's easy enough if you don't mind diskjockeying so many floppies.
- I recommend using tar in conjunction with compress and, since this combination
- can't write a multiple floppies archive, use one of the numereous disk-split
- programs for that. The entire command would look like
-
- tar -c -v -z -f - | compress -c | diskbackup
-
- where 'diskbackup' can be found on nic.funet.fi and, I think, tsx-11.mit.edu.
- A few possible refinements:
- - leave out directories you don't really want to save. For once, tar acts
- strange when processing /dev; other candidates might be /tmp and /usr/tmp
- - when done, create an (empty) file to remeber the backup date
- - invent sort of an 'incremental' backup where you only save files newer than
- that last backup (use find -newer)
-
- --------
-
- From dpg@cs.nott.ac.uk (Dave `geek' Gymer)
-
- Well, various solutions have been proposed by lots of people using
- various combinations of things like tar and cpio, and special programs
- to split large files into floppy-sized pieces, but I've been using my
- own port of the afio archiver (an extended cpio) for some time now.
- afio provides multivolume archive support, and the ability to compress
- individual files as they go into the archive (and, obviously,
- uncompress them as they come out); this gives it a major advantage
- over tar, since it can cope with corruption of individual files within
- a large archive. It's a sort of poor-man's version of ARJ for UNIX.
-
- I've fixed quite a few bugs in the version of afio I'm using (I first
- started using it about two years ago when I was using MiNT on and
- Atari ST); one or two problems remain, but on the whole it is very
- usable.
-
- If anyone's interested, I'll be happy to send them the source.
-
- --------
- --------
-
- Yesterday I ftp'd, make'd and tried 'cpio' on my system. It worked fine
- backing up a small subset of my system using the instructions given by
- Philip Perucci. There was one little problem when I wanted to perform the
- restore. The command 'find X -print -depth' lists the files within a
- directory before listing the directory itself; this is the order in which
- the files get backed up. This results, at restore, in cpio trying to
- restore files in a directory which is not yet created. The directory
- gets created after cpio tries to restore files. I could make it work
- fine by removing the '-depth' option of find when performing a backup.
-
- Now I will have to go buy a few boxes of floppies to perform a full backup
- of my system. Lots of fun ahead :) .
-
- BTW Maybe this information could be put in the next release of the FAQ to
- the benefit of people like me who want to perform backups but can only
- rely on floppies as their backup media.
-
- PS. I now know that the diskbackup is mentionned in the FAQ ( I forgot to look
- first ). I think it would be good to mention the other options as well.
-
- Thanks again everyone.
-
- ---
- Gilles Gagnon gilles@dgbt.doc.ca | The Communications Research Centre
- | 3701 Carling Avenue, Ottawa CANADA
-
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