Bash script to configure a debian-based distribution (like ubutnu) It checks the user rights and install the package only if necessary

Debian based config

#!/bin/bash

#################################
#   Config script for Ubuntu    #
#################################

# exit if error
set -e

# check rights
if [ "$(whoami)" != "root" ]; then
    echo "ERROR: You must be root to run this script. Try:
sudo $0 $1"
    exit 1
fi

### SETTINGS ###
# Add wathever you what to install
TO_ADD_REPO="ppa:webupd8team/sublime-text-2"
TO_INSTALL="zsh terminator git sublime-text"

### UTILS ###
install(){
    if ! dpkg-query -Wf'${db:Status-abbrev}' $1 2>/dev/null; then
        apt-get install $1
    fi
}

### MAIN ###
add-apt-repository $TO_ADD_REPO
apt-get update
install $TO_INSTALL

#zsh conf
ZSH_PATH=$(which zsh)
if [ $? -eq 1 ]; then
chsh $USER -s ZSH_PATH
wget -O .zshrc http://git.grml.org/f/grml-etc-core/etc/zsh/zshrc
fi

### END ###