Accepted answer

There is only one file.

lrwxrwxrwx 1 root root 16 Aug 8 2012 /usr/lib/eclipse/eclipse.ini -> /etc/eclipse.ini


According to

Eclipse startup is controlled by the options in $ECLIPSE_HOME/eclipse.ini. If $ECLIPSE_HOME is not defined, the default eclipse.ini in your Eclipse installation directory (or in the case of Mac, the directory) is used.


The certain way to make sure is to run strace on eclipse. In the output you'll see where is eclipse actually trying to pull the file from.


I have Ubuntu 18 and eclipse installation is squashed in a file


which is mount on /snap/eclipse/40 as read only. Just run

mount | grep eclipse*.snap

This eclipse.ini file is really read only, that means, you cannot modify it, even with sudo. However, I also have a eclipse.ini.ignored file in HOME/.eclipse/some number/configuration. This is being by default ignored, but you can change the "launcher.ini" in the eclipse launcher command.


You probably have already found this out, chances are when you installed Eclipse the installation created (or you did manually) a file /usr/bin/eclipse which if you check it probably looks like the following:

export ECLIPSE_HOME="/opt/eclipse"

$ECLIPSE_HOME/eclipse $*

especially if you followed instructions similar to the ones like these on If-not-true-then-false

On the other hand if you have installed from a package, I suspect you will find that eclipse ends up in /usr/bin, most likely a symbolic link to /usr/lib/eclipse/eclipse (or at least I found it on my Fedora system after using yum to install eclipse).


Here's how to determine which eclipse.ini file you should use (

  • If you downloaded Eclipse IDE manually from internet the "eclipse.ini" file is just inside the unpacked folder
  • If you installed Eclipse via terminal or software center the location of the file is "/etc/eclipse.ini"
  • In some Linux versions the file can be found at "/usr/share/eclipse/eclipse.ini". Do not use this file if you found a config file at "/etc/eclipse.ini".

To be sure where your Eclipse folder is, check $ECLIPSE_HOME, and if not specified (these directions at least work for Juno):

  • Open Eclipse as you normally do.
  • Click Help -> About Eclipse SDK
  • Click Installation Details
  • Go to the Configuration tab
  • Find "eclipse.home.location=file:PATH". PATH is where eclipse is installed.


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