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I can find a particular application 'JabRef' at the ubuntu software centre. But whenever I type sudo apt-get install jabref in terminal, it says package not found. What's going wrong here? Do I have to capitalise the exact letters as in the application name or do I need some additional steps to make sure the terminal looks at the correct repository for the particular installer?

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up vote 2 down vote accepted

Execute sudo apt-get update first and then try installing jabref again.

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Make sure that Universe repository is available in software sources as here . Tick mark it if Unticked initially.

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Then do sudo apt-get update & sudo apt-get upgrade.

Check if jabref is present by apt-cache show jabref.

And finally sudo apt-get install jabref . No capitalization of any word is required however.

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