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I installed Eclipse Mars 4.5 with a desktop shortcut in 15.04, following the Ubuntu guide. When I try to launch eclipse from the terminal it opens Eclipse 3.8. How I can remove Eclipse 3.8 and have the terminal command open Eclipse 4.5?

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  • Please edit your answer and add the output of which eclipse and ls /opt.
    – Byte Commander ♦
    Oct 2, 2015 at 11:28
  • Make that type -a eclipse.
    – terdon
    Oct 14, 2015 at 14:15

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This is the version of eclipse (3.8.1-7) [universe]eclipse (3.8.1-7) [universe] that ships with 15.04. My guess is that you have installed the 4.5 version independently of the apt packaging system. It will be tricky to work out where this is installed on the filesystem, but my guess will be /opt.

You need add the path of the executable eclipse to $PATH for it to work from (if it isn't already in there). You can check with 

$ echo $PATH

If the path for your new install isn't in there, then it won't work.

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