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So, I'm new to linux I'm using Lubuntu 17.10. When I try to install a package either in a terminal or software centre. I tried everything even re-installing and that didn't help!

When I try to install through terminal I get this message:
E: Unable to locate package (package name).

In the software centre I try to install a program but nothing happens :/

Can anyone help me? Thanks!

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This error shows up when your Sources.list doesn't have the information about the package you're trying to install.

If you're too new and don't know what is sources.list.

Apt uses a file that lists the 'sources' from which packages can be obtained. This file is located at /etc/apt/sources.list.

Possible steps to fix your issue :

  1. Make sure that the package you want to install actually exists or not.
  2. Run sudo apt-update to update sources.list, then try installing package again.
  3. If even after step 2 your problem isn't solving, generate a sources.list using this online website : https://repogen.simplylinux.ch/

You can also try add repositories (main, universe, restricted, multiverse) manually by using the following commands

sudo add-apt-repository main

sudo add-apt-repository universe

sudo add-apt-repository restricted

sudo add-apt-repository multiverse
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  • I'd maybe change the formatting of last block of code, it's not very clear as it is (at least on mobile).
    – dsSTORM
    May 17, 2018 at 8:48

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