This question already has an answer here: What does Package <package> has no installation candidate mean? 2 answers I am trying to install the software-centre package on Terminal.. I have entered these commands: sudo apt-get install software-center* I get this: The following package was automatically installed and is no longer required thuderbird-global menu use 'apt-get autoremove' to remove them. another 'software-center' has no installation candidate any ideas?