From KdjWiki

Contents 1 Overview 2 Command Summary 3 Create Repository 4 Initial import 5 Daily update 6 Rolling Back

Overview

Changes to files can be stored with subversion. This improves over other backup strategies by allowing you to rollback to any previous version. Changes are stored as differences to the previous version and as such the space used is significantly less than it would be if you stored complete copies of files everytime they changed. Versions can be labeled and rolling back can be specified to these versions or particular dates.

Command Summary

svn checkout
svn import
svn add
svn delete

Create Repository

Initial import

Use the checkout action to link a folder to a repository:

  $ svn checkout http://svn.domainname.com/repo /path/to/source

Add current files:

  $ cd /path/to/source
  $ svn add *

Commit to repository:

  $ cd /path/to/source
  $ svn commit -m "Initial Import"

Verify import:

  $ svn status /path/to/source

Daily update

#!/bin/bash

source="/path/to/source"
cd "${source}"

need=`svn status`

if [ "$need" != "" ]; then

	# don't worry about modified or deleted files
	need=`echo "${need}" | grep -v "^M" | $grep -v "^D"`

	if [ "$need" != "" ]; then
		added=`echo "${need}" | grep -F "?"`
		if [ "${added}" != "" ]; then
			ret=`svn add -q * > /dev/null 2&>1`
		fi

		need=`svn status | grep -v "^M" | grep -v "^A"`
		if [ "$need" != "" ]; then
			gone=`echo "${need}" | grep -F "!"`

			echo
			if [ "${gone}" != "" ]; then
				echo "You have removed file(s) from ${source} and will need to address with: svn delete {filename}"
			else
				echo "You have made changes to ${source} that require manual intervention - please address"
			fi
			echo "${need}" | grep -v "^M" | grep -v "^A"
			echo
		fi
	fi

	today=`date`
	ret=`svn commit -m "Update - ${today}"`
fi

exit 0

Rolling Back

To see the version are available for a specific file:

  $ svn log {filename}

To see the differences between the current version and a specific version, you can use:

  $ svn diff -r {revision #} {filename}

To compare two revisions, you can use:

  $ svn diff -r {revision1 #}:{revision2 #} {filename}

To retrieve a specific version:

  $ svn cat -r {revision #} {filename}

And you can redirect this to a file such as:

  $ svn cat -r {revision #} {filename} > {new filename}

Or you could checkout a specific version of the whole project:

  $ svn checkout -r {revision #}