Linux Using PACKAGE MANAGERS [apt, dpkg]

PACKAGE MANAGER

•     Every Linux Distro have a package manager.
•     Used to install,uninstall,update and many other function related to programs in the system

Advantages

1. Download from OS project  repositories  of packages
2. Secure provider
3. Dependencies resolution
4. Common Installation and  configuration location
5. Standard format

Package manager

 Debian/Ubuntu

1. backend : dpkg
2. frontend : apt
3. GUI for apt :  aptitude

ADVANCE PACKAGING TOOL (apt)

         
 apt-get

1. Installing : apt-get install [package name]
2. Uninstalling : apt-get remove [package name]
3. Remove downloaded pkg files : apt-get clean
4. Purge : apt-get purge [package name]
5. Update : apt-get update

 apt-cache

1. Search : apt-cache search [package name] 
2. Show : apt-cache show[package name] 
3. Check if a package is install or not : apt-cache policy [package name] 
4. List currently installed packages : apt-cache [package name]  

 /etc/apt/sources.list

1. Contains the repositories from which apt constructs its database.
2. Format : deb [location of resource] [distribution][components]
3. Distribution:

lenny (current -stable)
squeezy  (testing)
sid (unstable)
etch (old-stable)