Este es un archivo sh que permite instalar algunas aplicaciones necesarias para el disfrutar plenamente de Elementary OS. esto esta probado en Freya en pc y laptop.

elementary-os-postinstall.sh

#! /bin/sh

# actualizar el sistema operativo
sudo apt-get update && sudo apt-get upgrade -y && sudo apt-get dist-upgrade -y

# Instalar Soporte para formatos de archivos Extra
sudo apt-get install unace rar unrar p7zip-rar p7zip zip unzip sharutils uudeview mpack lha arj cabextract file-roller -y

# programas adiccionales varios
sudo apt-get install gparted soundconverter puddletag gimp synaptic firefox -y

#add google key
wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -

# instalación de dodecs y otras yerbas
sudo add-apt-repository ppa:webupd8team/sublime-text-3 -y
sudo add-apt-repository ppa:flacon -y
sudo add-apt-repository ppa:mpstark/elementary-tweaks-daily -y
sudo add-apt-repository ppa:tualatrix/ppa -y
sudo apt-add-repository ppa:mc3man/trusty-media -y
sudo add-apt-repository ppa:alessandro-strada/ppa -y
sudo add-apt-repository "deb http://archive.canonical.com/ trusty partner" -y
sudo add-apt-repository ppa:cybre/elementaryplus -y
sudo sh -c 'echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
sudo apt-get update
sudo apt-get install sublime-text-installer flacon menulibre elementary-tweaks ubuntu-restricted-extras ffmpeg gstreamer0.10-plugins-ugly libavcodec-extra-54 libvdpau-va-gl1 libmad0 mpg321 gstreamer1.0-libav flashplugin-installer pepperflashplugin-nonfree inkscape skype bleachbit elementaryplus ttf-mscorefonts-installer google-chrome-stable -y
sudo /usr/share/doc/libdvdread4/install-css.s­h

# todo para desarrollar con PHP y Pyton
sudo apt-get install curl git apache2 python-dev python-pip libxml2-dev libxslt-dev python-soaplib libxml2-dev libxslt1-dev libxml2 php5 php-pear php5-curl php5-gd php5-imagick php5-intl php5-ldap php5-mcrypt php5-mysql php5-odbc php5-pgsql php5-xsl php5-xmlrpc php5-sasl php-soap php-apc php5-mongo -y
sudo a2enmod headers rewrite
sudo service apache2 restart

# Instalando composer
curl -sS https://getcomposer.org/installer | sudo php -- --install-dir=/usr/local/bin --filename=composer

# instalar postgresql
sudo apt-get install postgresql postgresql-client  pgadmin3 -y
sudo -u postgres psql -U postgres -d postgres -c "alter user postgres password '123456';"

# instalar mysql
sudo echo mysql-server mysql-server/root_password select 123456 | debconf-set-selections
sudo echo mysql-server mysql-server/root_password_again select 123456 | debconf-set-selections
sudo apt-get install mysql-server mysql-client mysql-workbench -y

# instalar WPS
sudo wget http://kdl.cc.ksosoft.com/wps-community/download/a18/wps-office_9.1.0.4961~a18p1_amd64.deb
sudo dpkg -i wps-office_9.1.0.4961~a18p1_amd64.deb
sudo apt-get -f install
sudo rm wps-office_9.1.0.4961~a18p1_amd64.deb

#instalar Dropbox
sudo wget https://www.dropbox.com/download?dl=packages/ubuntu/dropbox_2015.02.12_amd64.deb
sudo dpkg -i  "download?dl=packages%2Fubuntu%2Fdropbox_2015.02.12_amd64.deb"
sudo rm "download?dl=packages%2Fubuntu%2Fdropbox_2015.02.12_amd64.deb"

# instalar MegaSync
sudo wget https://mega.nz/linux/MEGAsync/xUbuntu_14.04/amd64/megasync-xUbuntu_14.04_amd64.deb
sudo dpkg -i  megasync-xUbuntu_14.04_amd64.deb
sudo rm megasync-xUbuntu_14.04_amd64.deb

sudo apt-get -f install

Si hay algo que no se desee instalar solo hay que comentarlo.