Fortran 77 Development Quick Start on Ubuntu Linux
You are Welcome! The Tutorial Shows You Step-by-Step How to Install and Getting-Started with Fortran 77 Development on Ubuntu 15.04 Vivid Vervet i386/amd64 GNU+Linux Desktop.
On the Article Bottom Link to Guide on Installing the Best Fortran 77 IDE for Ubuntu Linux.

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Open a Shell Terminal Emulator Session
Ctrl+Alt+t on Desktop
(Press “Enter” to Execute Commands) -
Installing Fortran 77 Ubuntu GNU Compiler
sudo apt-get install g77
If Got “User is Not in Sudoers file” then see: How to Enable sudo
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How to Install Best Fortran 77 IDE for Ubuntu Linux
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