ubuntu

• Ubuntu Basics
  • Checking Ubuntu Version
    • lsb_release
  • Ubuntu Lifecycle
  • After death Ubuntu
  • Update sources.list (30 Aug 2013)
• Ubuntu Package Management
  • References
  • Tools
    • dpkg or apt-get
  • List installed packages
    • grep /var/lib/dpkg/status
    • dpkg-query
  • Search for packages
    • apt-cache search
  • Info for a package
    • understanding unmet dependencies
    • dpkg –status OR dpkg -s
    • apt-cache showpkg
  • List Files in a package
    • dpkg -L
  • Install packages
    • apt-get
• apt-get
  • ubuntu version
  • repository config
  • sudo apt-get update
    • Giving 404s
• dpkg
  • frontends : apt-get OR dselect
  • package state
    • states
    • selection states
    • flags
  • dpkg -s, –status package-name
    • Version
    • Config-Version
    • Status field enumerations
      • Want
      • Flag
      • Status
  • dpkg –set-selections
  • dpkg -C, –audit
• apt-get Unmet Dependencies
  • pinning and holding pkgs
  • unmets prevent apt-get installation
    • sudo apt-get install python-numpy -y
    • sudo apt-get install apt-rdepends
  • sudo apt-get -f install
  • Make sense of dependencies
    • libgcc1
    • sudo apt-cache showpkg libgcc1
  • gcc-4.5-base not available
  • Downgrade to reduce unmet
    • proceed
  • simulate libc6 downgrades
    • sudo apt-cache showpkg libc6
    • sudo apt-get -s install libc6=2.9-4ubuntu6.3
    • sudo apt-get -s install libc6=2.9-4ubuntu6
    • sudo dpkg -s libc-bin
    • sudo apt-cache showpkg libc-bin
  • holding