The Tutorial shows you How to Install and Getting-Started with the Latest Eclipse 2023-03 R IDE JEE 64-bit for Debian 6 Squeeze Xfce Amd64 Desktop.
There is also the Possibility to Install before the Classic Eclipse via apt-get and after Adding the JEE Developer Tool Capabilities via Eclipse Updates.
But the Debian Squeeze Apt Repository is Still presenting the old Eclipse3 Flavor with an old 3.5 Galileo Release.
Hence, here to Get Into New Latest Eclipse we Proceed Directly to Download and Installation of the Whole Eclipse for Java JEE Linux Release.
The Content give Focus Only to the Essentials Instructions and Commands to make it Easier to Understand ;)

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Download Latest Eclipse IDE Luna JEE for Linux:
Eclipse 2023-03 R IDE JEE Linux 64-bit -
Double-Click on Archive and Extract Eclipse into /tmp
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Open a Terminal Window
(Press “Enter” to Execute Commands) -
Relocating Eclipse.
su
If Got “User is Not in Sudoers file” then see: How to Enable sudo
sudo chown -R root:root /tmp/eclipse && mv /tmp/eclipse /opt/
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Starting Eclipse from Terminal.
Making a Symlink
ln -s /opt/eclipse/eclipse /usr/local/bin/eclipse
After you can Start Eclipse JEE from Terminal simply with:
eclipse
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Create an Eclipse Launcher for Quick Starting:
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Recommended Oracle JDK Installation
Required to Get the Best Results from Eclipse.