If you manually installed a package that had unmet dependencies, apt-get will install those dependencies, if possible, otherwise it may simply remove the package that you installed in order to resolve the problem. Package dependency errors are not always generic and depends on the package to be installed. Voted up for mention of Aptitude conflict resolver. In the twin paradox or twins paradox what do the clocks of the twin and the distant star he visits show when he's at the star? Here you can also add and remove PPAs. Since apt-get works alongside with dpkg, which means apt-get will obey dpkg function. This is probably the cleanest solution, and sometimes can be faster to do. Why does the capacitance value of an MLCC (capacitor) increase after heating? It will refresh any official and third party repositories you have added to your system and pull a new list of packages. It is always a good idea to back up configuration files like /etc/apt/sources.list, so you can revert the changes if needed. To get around this, we have to install Synaptic package manager which is a frontend for apt. PPAs (Personal Package Archives) are third-party package repositories hosted on Launchpad, for packages not supported by official Ubuntu repository. Therefore you should always be careful when adding any random PPA to your system. when I tried to install some other package (for example. These are some methods that can be used to fix and prevent dependency errors in Ubuntu. It just makes me wish apt and or dpkg had better protections to make sure they didn't get into these stuck broken states, or were better at resolving them. However, download speed may be low depending on your location and proximity to the servers. This was a huge help for me fresh install of Lubuntu 12.04 and couldn't install basic things such as gvim (vim-gtk) or openssh-server.
This should be done to get fresh cache packages and newer updates. Before trying any new command or adding any new ppa try this. I know the top two answers overwhelm the others a bit, but I'm not sure changing the nature of the question is the right solution, especially since you nullify the other answers.
Occasionally, when I'm installing stuff, I get an error like the following: APT is a package management system for Debian and other Linux distributions based on it, such as Ubuntu. This article will list a few methods that can be used to prevent and fix these kinds of dependency errors. Very simply, packages are an alternative to downloading, building, and installing software from scratch. Not sure why this was downvoted. If you are still unable to install your package, consider downloading and using its binary, if available. I'm attempting to create a, Actually "the exact package name", while not relevant in your question, is extremely relevant to any individual's issue in this regard. If you see an output N not upgraded, where N is the number of packages that couldnt be upgraded, then you will need to remove them one by one. this link, while it does not explain dependencies, or their general concept, does show a quick tutorial of the interactive resolver: +1 aptitude just saved my bacon in the face of a GTK3 conflict. End of Life Notice: Ubuntu 21.10 (Impish Indri) reached End of Life on July How to run 'apt-get install' to install all dependencies? This seems to have been overlooked in the answers, most of which are quite good otherwise. To change the download server, launch the Software & Updates app from the app launcher. Y PPA Manager is an one stop shop for all of your PPA needs.
or something like this (with the relevant packages): But if you end up with this sort of error: You can then search for ways to install them here or here. Additionally not noted is that in many, if not most cases, "
Try this command to find and repair the conflicts: If it cannot fix the conflicts, it will exit with: 0 upgraded, 0 newly installed, 0 to remove and 6 not upgraded. My way is add the depended package into install list. (Synaptic is also available in Ubuntu.). It is the case where the installed version is more recent than the latest (what synaptic shows). yes,in most cases it resolves the dependencies. EDITED: using sudo dpkg -r [package] is encouraged as it has pretty powerful removal function. You call apt-get to purge the failed package you were trying to install in the system, and then you call build-dep command, which apt-get will grab and install dependencies individually belonging to this package, so that way they'll satisfy the package prior. No matter the reasons for the problem, you can always setup for manual compilation and build the needed package and all of it's dependencies in the exact needed versions from source. Usually the best 1st step to resolving this is to identify the source of pkg1 & pkg2. In order for your installation to be completed, package1 needs package2. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. BTW, you have a typo in --add-architecture, and you should add a reminder to run apt-get upgrade after --add-architecture. Keep Ubuntu Up to date. Aptitude combines a lot of apt options in a single command so that you dont have to run multiple commands to fix errors. Running the update command from terminal bypasses phased rollout of official Ubuntu packages through the GUI updater, so you always get the latest list of packages. You can also remove PPA repositories only. To install PPA Purge run the following command: But, considering the question apt is broken, the above command will fail.