To update the list of available software run the following command: sudo apt updateĪnother possible reason for this message is because of a proxy configuration issue.Īptitude is a terminal-based package manager with a command-line mode similar to that of apt-get only it is smarter.
bĪnother possible reason for this message is that this package is not found in the list of available software because the list of available software software in the software sources has not been updated. deb file from the source you downloaded with a program such as checkinstall, and install the. rmadison will also show if the package you are looking for is only available as source code in which case you must download the package's source code with apt-get source, build a. Once again run rmadison to show this information. This is worth checking if your computer has an ARM processor. This command will show which Ubuntu releases provide this package and also will show which repository provides this package.Īnother possible reason for this message is that this package is not available for your computer's CPU architecture. To check for this possibility run the following command: rmadison For example, qt4-default has been discontinued from the default repositories in Ubuntu 20.04 and later. One possible reason for this message is that this package is an old package that has been discontinued from your release's default repositories. What does Package has no installation candidate means that the package is not found in your Ubuntu releases software sources. To install package munin-memcached, issue the below command: sudo apt-get update & sudo apt-get install munin-memcached To add the PPA, issue the below command: sudo add-apt-repository ppa:chris-lea/munin-plugins I checked again and it is not available in official Ubuntu repositories.Īfter a bit of googling, I found that it is available in this PPA: chris-lea/munin-pluginsĪdd this PPA and install the packages at your own risk. This means of all the repositories listed in your software sources, none of them have the package named munin-memcached. It then downloads the package from that repository. Then when you try to install any package, APT checks the package name in its database, finds it and checks the name of the repository from where it got it. When you add software sources, you need to do an apt-get update so that your system APT's database is updated with all the packages on the repositories listed in the software sources lists. This happens when you try to install a package about which APT does not have any idea.
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