I have just started Linux. I have a SBC(Atom processor) on which I have installed Ubuntu 12.04 and now I am trying to install Fortran IDE.

For which I have learnt that I need to install OpenJDK first, then Eclipse Juno and at last the Phortran plugin for Eclipse.

I have no Internet access so I had follow the below steps for manual installation.

1. First download the eclipse tar.gz package (downloaded: eclipse-parallel-juno-linux-gtk.tar).

2. Then right-click the eclipse tar.gz and choose the extract here option to extract the tar.gz package.You can also use the command line to extract the tar.gz package.

   # tar xzf eclipse-cpp-juno-linux-gtk.tar.gz
   

3. Move to /opt/ folder.

   # mv eclipse /opt/
   

   Use sudo if the above command gives permission denied message.

   # sudo mv eclipse /opt/
   

4. Create a desktop file and place it into /usr/share/applications

   # sudo gedit /usr/share/applications/eclipse.desktop            
   

   and copy the following to the eclipse.desktop file

   [Desktop Entry]
   Name=Eclipse 
   Type=Application
   Exec=/opt/eclipse/eclipse
   Terminal=false
   Icon=/opt/eclipse/icon.xpm
   Comment=Integrated Development Environment
   NoDisplay=false
   Categories=Development;IDE
   Name[en]=eclipse.desktop
   

5. Create a symlink in /usr/local/bin using

   # cd /usr/local/bin
   # sudo ln -s /opt/eclipse/eclipse
   

6. Now its the time to launch eclipse.

   # /opt/eclipse/eclipse  -clean  &       
   

Now at step 5, when I type the command sudo ln -s /opt/eclipse/eclipse , I get an this error message:

ln: Failed to create symbolic link './eclipse': File exists.

Please help me in resolving this.