Some shell scripts to install things on debian based system,

installer_dev_utils.sh

#!/bin/bash
# -------------------------------------------------------------------------
# Shell script to install development utilities
# -------------------------------------------------------------------------
apt-get update
apt-get install git-core

apt-get install mercurial

installer_lamp.sh

#!/bin/bash
# Shell script to install LAMP with dependencies for running PHP applications
# with mod_fcgi
# -------------------------------------------------------------------------
# Version 1.1 (August 18 2011)
# -------------------------------------------------------------------------
# Copyright (c) 2011 Finn Hensner <http://www.gerillafilm.se>
# This script is licensed under GNU GPL version 2.0 or above
# -------------------------------------------------------------------------
apt-get update
aptitude install apache2 apache2-suexec libapache2-mod-php5
#a2dismod php5
a2enmod rewrite
a2enmod suexec
a2enmod include
#a2enmod fcgid
a2enmod expire

apt-get install php5
apt-get install mysql-server
apt-get install memcached
apt-get install php5-common php5-mysql php5-curl php-pear phpunit php5-memcache php-soap phpmyadmin php5-gd

sleep 1
echo "Adding extensions and fixes to custom ini"
cat > /etc/php5/conf.d/custom.ini << EOF
cgi.fix_pathinfo = 1
extension=gd2.so
extension=pdo.so
extension=pdo_mysql.so 
extension=php_pgsql.so
extension=php_pdo_pgsql.so
extension=memcache.so
EOF

sleep 1
echo "Add server name to Apache config"
echo "ServerName 127.0.0.1" >> /etc/apache2/apache2.conf

sleep 1
#echo "Removing default virtual host."
#rm /etc/apache2/sites-available/default
#rm /etc/apache2/sites-enabled/default-000

sleep 1
echo "Restarting apache2"
service apache2 restart

installer_ruby.sh

#!/bin/bash
# -------------------------------------------------------------------------
# Shell script to install Ruby with RbEnv
# -------------------------------------------------------------------------
# Clone rbenv into ~/.rbenv
git clone git@github.com:sstephenson/rbenv.git ~/.rbenv
 
# Add rbenv to your PATH
# NOTE: rbenv is *NOT* compatible with rvm, so you'll need to 
# remove rvm from your profile if it's present. (This is because
# rvm overrides the `gem` command.)
echo 'export PATH="$HOME/.rbenv/bin:$HOME/.rbenv/shims:$PATH"' >> ~/.bash_profile
exec $SHELL
 
# Install Ruby versions into ~/.rbenv/versions
# (ruby-build is a convenient way to do this)
cd
git clone git@github.com:sstephenson/ruby-build.git
cd ruby-build
./install.sh
ruby-build 1.8.7-p352 ~/.rbenv/versions/1.8.7-p352
ruby-build 1.9.3-preview1 ~/.rbenv/versions/1.9.3-preview1
 
# Install shims for all Ruby binaries
rbenv rehash
 
# Set a default Ruby version
rbenv set-default 1.9.3-preview1
ruby --version     # 1.9.3

# INstall juicer compresser
#sudo apt-get install libxslt-dev libxml2-dev
#gem install juicer
#juicer install yui_compressor
#juicer install jslint
 
# When you install gems with binaries, you need to run `rbenv rehash`
gem install bundler
bundle --version   # command not found
rbenv rehash
bundle --version