• All Linux distributions share the same Linux kernel lineage but the details are different.
• Main distributions: Debian, Red Hat, SUSE
• Ubuntu has been called a 'cleaned-up' version of Debian.
• See http://ubuntu.com
• Additional packages or updates to installed software are maintained by distros at repositories.
  • Ubuntu has 4 main types of respositories and at least one additional that facilitates user maintained repos
    • Four main repositories are: main, universe, restricted, multiverse
    • Another type is Personal Package Archives (PPA). This allows developers to package their software outside of the main repos.
• Packages available at http://packages.ubuntu.com
• A repository is a location that serves as a software archive for a distribution
  
• See https://help.ubuntu.com/community/Repositories/Ubuntu
• Edit /etc/apt/sources.list to see your system's default repository
• Package managers include RPM, yum, and APT.
• Our Ubuntu system offers APT, dpkg, aptitude and Synaptic Package Manager
• Synaptic simply adds a GUI front end to aptitude
• Advice:  if you are browsing, you might want to use Synaptic, if you know the package name, you might want to use APT.
  

Advanced Packet Tool (APT):   apt-get,  apt-cache, apt-config

• Your packages are managed by apt-cache
• apt-cache stats     //to see stats on all packages installed
  
• apt-cache pkgnames  //list all packages install
  
• apt-cache  search keyword
• To install new packages, we use apt-get
• sudo apt-get install  package
• To see how much disk space a package will require:
  • apt-cache --no-all-versions show iperf | grep '^Size: '
    
• apt-config provides an interface to configure APT on you system.  

Example:   after a Ubuntu install, you might find you don't have 'make' ....

•  sudo apt-get install xutils-dev
  

Last update: 1/29/17