Wednesday, February 25, 2015

ubuntu commands

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ubuntu commands

Seach the cached list of packages the contain a command or description
$ apt-cache search nload
Search the list of installed packages
$ dpkg-query -S mount
List all the files contained in the initscripts package
$ dpkg -L initscripts
Refresh the list of cached packages
$ sudo apt-get update

  • APT: Use APT to download and install packages form online repositories.
  • dpkg: Use dpkg to work with .deb files
  • aptitude: Use aptitude at the command line for working with online repositories

To report on the total number of packages available
$ apt-cache stats
Total package names: 60926 (1,219 k)
Total package structures: 102901 (5,762 k)
  Normal packages: 71359
  Pure virtual packages: 1187
  Single virtual packages: 9068
  Mixed virtual packages: 1825
  Missing: 19462

Enabling More Repositories for apt
$ sudo vim /etc/apt/sources.list
In a minimal system install, adding software collections with tasksel
$ sudo tasksel

Managing software with APT

check for updates to the packages
$ sudo apt-get update
To fid packages in any available repository
$ apt-cache search [package-name]
Install package
$ sudo apt-get install [package-name]
Display information about the software
$ apt-cache show [package-name]
Check updates for all installed packages and then prompt to download and install them with this command
$ sudo apt-get upgrade
Run this command anytime to delete partially downloaded packages, or packages no longer installed
$ sudo apt-get autoclean
Remove all cached packages from /var/cache/apt/archives to free up disk space using this command
$ sudo apt-get clean
This command removes the named package and all its confiuration fies
$ sudo apt-get --purge remove [package-name]
This command does a sanity check for broken packages. This tries to fix any
$ sudo apt-get -f install
This command lists GPG keys that APT knows about
$ sudo apt-key list
Check for dependencies the packages
$ sudo apt-cache depends [package-name]
Removing packages
$ sudo apt-get remove [package-name]
Clean up packages
$ find /var/cache/apt/ -name \*.deb
$ sudo apt-get clean
Downloading packages
$ sudo apt-get download [package-name]

Managing software with dpkg

This command lists all installed packages
$ dpkg -l
This command lists all the files that have been installed from a package
$ dpkg -L [package-name]
Install a package
$ sudo dpkg -i [package-name]
Remove a package
$ sudo dpkg -r [package-name]
Remove package and configuration file
$ sudo dpkg -P [package-name]
Verifying install packages with debsums
$ debsums -a Check all files, include config files left out by default
$ debsums –e Check config files for packages only
$ debsums –c List only changed files to stdout
$ debsums –l List files that don't have md5sum info
$ debsums –s List only errors; otherwise be silent
$ debsums package List the packages you want debsums to analyze

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