Difference between revisions of "Apt-get/dpkg"
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| − | * apt-get | + | == Command Summary == |
| + | |||
| + | * apt-get - install and remove stuff | ||
*; apt-get install ''package'' : install package | *; apt-get install ''package'' : install package | ||
| + | *; apt-get install ''package''=''version'' : install specified version of package | ||
*; apt-get update : update sources | *; apt-get update : update sources | ||
*; apt-get upgrade : upgrade all upgradeable packages | *; 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 | + | * apt-cache - find information on packages |
| − | *; apt-cache search ''regexp'' : search for package | + | *; apt-cache search ''regexp'' : search packages names and descriptions for ''regexp'' |
| + | *; apt-cache show ''package'' : show package info | ||
| + | *; apt-cache policy ''package'' : show installed and available versions of package | ||
| − | * dpkg | + | * 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 -s ''package'' : show status of package | ||
*; dpkg -L ''package'' : list files in package | *; dpkg -L ''package'' : list files in package | ||
*; dpkg --get-selections : list all installed packages | *; dpkg --get-selections : list all installed packages | ||
| + | |||
| + | * wajig - wrapper for apt-get, dpkg, dpkg-deb, apt-cache, and other tools | ||
| + | *; wajig hold ''package'' : stop ''package'' being upgraded as part of normal upgrade or dist-upgrade | ||
| + | *; wajig unhold ''package'' : revert held status of ''package'' | ||
| + | |||
| + | == Solving public key errors == | ||
| + | |||
| + | Errors like: | ||
| + | <pre> | ||
| + | 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 | ||
| + | </pre> | ||
| + | can be fixed by finding out the location for the relevant sites public key, and installing the key using: | ||
| + | <pre> | ||
| + | wget http://packages.freecontrib.org/ubuntu/plf/12B83718.gpg -O- | sudo apt-key add - | ||
| + | </pre> | ||
Latest revision as of 16:09, 3 May 2011
Command Summary
- apt-get - install and remove stuff
- apt-get install package
- install package
- apt-get install package=version
- install specified version of 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-cache policy package
- show installed and available versions of package
- 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
- wajig - wrapper for apt-get, dpkg, dpkg-deb, apt-cache, and other tools
- wajig hold package
- stop package being upgraded as part of normal upgrade or dist-upgrade
- wajig unhold package
- revert held status of package
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 -
