Ubuntu

General

• Documentation for Ubuntu 14.04 LTS
• Ubuntu 14.04 LTS (Trusty Tahr) Guide

Web Server How To

• About Debian Linux - How to Set Up Debian Linux Internet Server
• Lamp Server Notes

Package Manager - Apt-Get

• apt-get Man Page
• Ubuntu Packages Web Catalog
• Synaptic - GUI Interface for apt-get.

Commands

• Update - Updates the locally stored index of all installable packages from the remote server.
• Upgrade - Upgrade all packages that have been already installed.

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install [PACKAGE NAME]
sudo apt-get remove [PACKAGE NAME]
apt-get help

Local Package Index

/etc/apt/sources.list
/etc/apt/sources.list.d

Installing Applications of Interest

sudo apt-get install mutt