Difference between revisions of "Apt-get/dpkg"

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(Command Summary)
(Command Summary)
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== Command Summary ==
 
== Command Summary ==
  
* apt-get
+
* apt-get - install and remove stuff
 
*; apt-get install ''package'' : install package  
 
*; apt-get install ''package'' : install package  
 
*; apt-get update  : update sources
 
*; apt-get update  : update sources
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*; apt-get remove ''package'' : remove package  
 
*; apt-get remove ''package'' : remove package  
  
* apt-cache
+
* apt-cache - find information on packages
 
*; apt-cache search ''regexp'' : search packages names and descriptions for ''regexp''
 
*; apt-cache search ''regexp'' : search packages names and descriptions for ''regexp''
 
*; apt-cache show ''package'' : show package info
 
*; apt-cache show ''package'' : show package info
  
* apt-file
+
* apt-file - look for files contained within packages
 
*; apt-file update : update file contents lists
 
*; apt-file update : update file contents lists
 
*; apt-file search ''string'' : search package contents for file name/path containing ''string''
 
*; apt-file search ''string'' : search package contents for file name/path containing ''string''
 
*; apt-file list ''package'' : list files in ''package''
 
*; apt-file list ''package'' : list files in ''package''
  
* dpkg
+
* dpkg - information on installed packages
 
*; dpkg -s ''package'' : show status of package
 
*; dpkg -s ''package'' : show status of package
 
*; dpkg -L ''package'' : list files in package
 
*; dpkg -L ''package'' : list files in package

Revision as of 14:13, 7 September 2007

Command Summary

  • apt-get - install and remove stuff
    apt-get install package 
    install package
    apt-get update  
    update sources
    apt-get upgrade 
    upgrade all upgradeable packages
    apt-get dist-upgrade 
    upgrade all upgradeable packages, including installing new packages where dependencies have changed
    apt-get remove package 
    remove package
  • apt-cache - find information on packages
    apt-cache search regexp 
    search packages names and descriptions for regexp
    apt-cache show package 
    show package info
  • apt-file - look for files contained within packages
    apt-file update 
    update file contents lists
    apt-file search string 
    search package contents for file name/path containing string
    apt-file list package 
    list files in package
  • dpkg - information on installed packages
    dpkg -s package 
    show status of package
    dpkg -L package 
    list files in package
    dpkg --get-selections 
    list all installed packages

Solving public key errors

Errors like:

W: GPG error: http://packages.freecontrib.org edgy-plf Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F120156012B83718
W: You may want to run apt-get update to correct these problems

can be fixed by finding out the location for the relevant sites public key, and installing the key using:

wget http://packages.freecontrib.org/ubuntu/plf/12B83718.gpg -O- | sudo apt-key add -