Step 1: Install Ruby from apt-get.

~$ sudo apt-get install ruby irb ri rdoc ruby1.8-dev libzlib-ruby
libyaml-ruby libreadline-ruby libncurses-ruby libcurses-ruby libruby
libruby-extras libfcgi-ruby1.8 build-essential libopenssl-ruby
libdbm-ruby libdbi-ruby libdbd-sqlite3-ruby sqlite3 libsqlite3-dev
libsqlite3-ruby libxml-ruby libxml2-dev

Step 2: Download and install RubyGems

Just download and extract the latest Gem and run following command.

~$ sudo ruby setup.rb

After successful installation, run this to create the link in /usr/bin

~$ sudo ln -s /usr/bin/gem1.8 /usr/bin/gem

Step 3: Install Rails and Gems

~$ sudo gem install rails

~$ sudo gem install sqlite3-ruby mongrel capistrano

Since I don’t use MySQL anymore, it’s really optional. It’s
basically same as before, just make sure you are using following
command to get everything you need for MySQL.

~$ sudo apt-get install mysql-server mysql-client libdbd-mysql-ruby libmysqlclient15-dev

** UPDATE **

- “libmysqlclient-dev” is now “libmysqlclient15-dev” => I found this
out while installing my new server, but it appears that maurizio de
magnis already posted the solution in the comments. Thanks!

- “buildessential” is no longer required when installing Ubuntu Server

courtesy : here

On Ubuntu Server 8.04, PHP5, Drupal 6.x. If your Drupal’s Status report page returns the following error:

GD Image Rotation Low Quality / Poor Performance

The installed version of PHP GD does not support …

Here are the steps to remedy it. This will install a GD pre-compiled
working version. It is a complete bundled (forked) GD libraries:

1. Adding 2 lines to your file /etc/apt/sources.lst

2. If not already done removing your current GD package and its configurations.

sudo apt-get remove php5-gd

sudo apt-get --purge remove

3. Updating your current apt-get list

apt-get update

4. Installing working GD package.

apt-get install php5-gd

It will complain about non-authenticated sources, just ignore, it will also update some additional php libs.

When prompt select keep_current modified php.ini

5. Restarting Apache

/etc/init.d/apache2 restart

Courtesy : here

Check that it works by typing “svnnotify” at the terminal.

You should be prompted for more arguments

Missing required “–repos-path” parameter

With that installed, the next step is to replace the existing call to commit-email.pl with a call to svnnotify:

svnnotify –repos-path “$1″ –revision “$2″ –to myemail@example.org –from anotheremail@example.org

The arguments are fairly self explanatory. You just need to replace the
values for the –to and –from arguments. A whole host of further
argument options are detailed in the documentation.
You may, for example, wish to use a particular smtp server rather than
relying on sendmail being installed and accessible on the SVN server.

If  you like to see who committed the fix by the email address
it came from, you can replace the –from argument with the
–user-domain argument.

The email notifications will subsequently come
from the given user that committed the fix @ the given domain (e.g.
user@example.org).

svnnotify –repos-path “$1″ –revision “$2″ –to myemail@example.org –user-domain example.org

The emails you receive with the previous command are fairly similar to the ones received via the commit-email.pl. In order to receive colorized html emails complete with diffs you need to add a couple of arguments:

svnnotify –repos-path “$1″ –revision “$2″ –to myemail@example.org –from
anotheremail@example.org –handler HTML:ColorDiff -d

There are further options when you use this email as detailed in the SVN::Notify::HTML and SVN:Notify::HTML::ColorDiff documentation. For example, you can provide a css url if the default styling of the email isn’t to your liking. 

The output is stored in a specified backup directory,  and copied to the external backup drive.

The script is ,

#!/bin/sh

SVN_REPOSITORIES_ROOT_DIR="/svn_repositories/"
BACKUP_DIRECTORY="/Users/Shared/backup/svn/"

for REPOSITORY in `ls -1 $SVN_REPOSITORIES_ROOT_DIR`
do
echo 'dumping repository: ' $REPOSITORY
/usr/local/bin/svnadmin dump $SVN_REPOSITORIES_ROOT_DIR$REPOSITORY | gzip > $BACKUP_DIRECTORY$REPOSITORY'.gz'
done

Source : Svnbackup

The next script is used to take  backs up all
repositories in your Subversion repository directory, puts on a
timestamp, and then deletes all repository backups older than seven
days. 

#! /bin/bash

########################################################################
# CONSTANTS
#
REPOS_BASE=”/subversion/repositories”
BACKUP_DIR=”/subversion/backups”
SVNADMIN_CMD=”/usr/bin/svnadmin”
#
########################################################################

########################################################################
# BACKUP EACH AND EVERY REPOSITORY VIA THE “HOTCOPY” COMMAND
#
for repository in $REPOS_BASE/*
do
    reposBase=`basename $repository`
    date_string=`date “+%F”`
    backupName=”$BACKUP_DIR/$date_string–$reposBase”
    [ -d "$backupName" ] && rm -rf $backupName/*
    mkdir -p “$backupName”
    ”$SVNADMIN_CMD” hotcopy “$repository” “$backupName”
done
#
########################################################################

########################################################################
# DELETE BACKUPS OLDER THAN 7 DAYS OLD
#
find $BACKUP_DIR -mtime +7 -delete
#
########################################################################

Source : Svnbackup