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Full Discussion: Help with a backup shell script
Top Forums UNIX for Dummies Questions & Answers Help with a backup shell script Post 88424 by Dingosatemypant on Thursday 3rd of November 2005 09:31:13 PM
Old 11-03-2005
Help with a backup shell script
I'm having an issue with a problem
A problem with this backup script is that if you backup the same file twice, you may get a warning message because you're overwriting an existing file. You could suppress the warning message, but a better solution is to save a series of backups distinguished by numbers. The first time you type backup foo.c, it copies it to foo.c.1. Then you make some changes to foo.c and type backup foo.c again; the script notices that foo.c.1 is already there, so it copies foo.c to foo.c.2 instead. The third time, you get foo.c.3, and so on

Here is the code I have so far:

#!/bin/csh -f

file ($*)
set num=1

while (-e $file.$num)
@ num = $num +1

do
cp ${file} ${file}.$num

if anyone could fill in the gaps or tell me where I'm going wrong here.. it would be greatly appreciated
 

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LEARN ABOUT DEBIAN

svn-fast-backup

svn-fast-backup(1)					      General Commands Manual						svn-fast-backup(1)

NAME

       svn-fast-backup - very fast backup for Subversion fsfs repositories.

SYNOPSIS

       svn-fast-backup [-q] [-k{N|all}] [-f] [-t] [-s] repos_path backup_dir

DESCRIPTION

       svn-fast-backup uses rsync snapshots for very fast backup of a Subversion fsfs repository at repos_path to backup_dir/repos-rev, the latest
       revision number in the repository.  Multiple fsfs backups share data via hardlinks, so old backups are almost free, since a newer  revision
       of a repository is almost a complete superset of an older revision.

       This  is  good for replacing incremental log-dump+restore-style backups because it is just as space-conserving and even faster; there is no
       inter-backup state (old backups are essentially caches); each backup directory is self-contained.  It has the same  command-line  interface
       as svn-hot-backup(1) (if you use --force), but only works for fsfs repositories.

       svn-fast-backup keeps 64 backups by default and deletes backups older than these; this can be adjusted with the -k option.

OPTIONS

       -h, --help
	      Shows some brief help text.

       -q, --quiet
	      Quieter-than-usual operation.

       -k, --keep=N
	      Keep a specified number of backups; the default is to keep 64.

       -k, --keep=all
	      Do not delete any old backups at all.

       -f, --force
	      Make a new backup even if one with the current revision exists.

       -t, --trace
	      Show actions.

       -s, --simulate
	      Don't perform actions.

AUTHOR

       Voluntary contributions made by many individuals.  Copyright (C) 2006 CollabNet.

								    2006-11-09							svn-fast-backup(1)
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