Of course, you will be asked to override the existing configuration files when you install it again. Purge is particularly useful when you have messed up with the configuration of a program, when you want to completely erase its traces from the system and start afresh. You can use the command below to clear apt cache locally saved retrieved package files :. Another way is to use autoclean. Another way to free up disk space is to use autoremove.
It removes libraries and packages that were installed automatically to satisfy the dependencies of another installed package. If that package is removed, these automatically installed packages are useless in the system. This command removes such packages.
This is a command-line way of cleaning a Linux system. There is more to apt-get, but this much should give you a pretty good start. You can always look up the man pages to get more information. How do you like this guide to apt-get commands in Linux? Was it helpful to you and clear enough to understand? Your feedback will help in creating more such guides in the near future.
Also a movie buff with a soft corner for film noir. Thank you very much! Extremely clear, to the point and helpful for me. Please log in again. The login page will open in a new tab.
After logging in you can close it and return to this page. Exclusive bonus: Download apt-get command cheatsheet for future reference. Last Updated : 04 Apr, Previous sudo command in Linux with Examples. Next apt command in linux with examples.
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We are thankful for your never ending support. Can you share some information about apt-cache implementation? How the cache is created, refreshed is it periodic, once a day or manual. As far as I read, the cache is refreshed manually. Assuming there is one package that has the new version, how does apt-cache updates its cache?
Hi, How can i search through installed applications? In particular I want to search with a keyword in both package name and description for installed package? You can use the following command to search for a particular packages, for example apache in this case. This is the equivalent of "Mark all upgrades" in Synaptic. It tells APT to use "smart" conflict resolution system, and it will attempt to upgrade the most important packages at the expense of less important ones if necessary.
It does an update of the package lists and checks for broken dependencies. Do this if you get complaints about packages with "unmet dependencies".
This may not be desirable if you have a slow Internet connection, since it will cause you to redownload any packages you need to install a program. For example: dpkg-reconfigure fontconfig-config will present you with a "wizard" on configuring fonts in Ubuntu. The note above about sudo usage applies to this command. While there is no built in way to remove all of your configuration information from your removed packages you can remove all configuration data from every removed package with the following command.
Similar to apt-cache search , but also shows whether a package is installed on your system by marking it with ii installed and un not installed. Note that foo. Use this command on. Consider this to be a "reverse lookup" utility. In order to use this command, the package dlocate must be installed on your system.
It is slower than dlocate but has the advantage of being installed by default on all Debian and Ubuntu systems. It answers the question, "what package provides this file? Use the command: apt-file update In order to use this command, the package apt-file must be installed on your system.
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