This post is for those novice users who used to write a lot of C programs under Windows environment (using Turbo C, Borland C, Visual C etc.) and wished to move to the GNU/LINUX world. Here is your very first simplest “Hello World” application under Linux.
First, open Terminal. In Ubuntu, press ALT+CTRL+T to open Terminal. Or in general, press ALT+F2 to run application launcher and enter terminal or gnome-terminal. You can also open Terminal using Menu (under Accessories or System Tools).
Edit your C source file using any text-editor. For the sake of simplicity, here we will use gedit to write our hello_world.c source file. Otherwise you can use vim, emacs as console-based text-editor or Kate (under KDE) as GUI-based text-editor.
Do not forget to save the file.
Now compile your hello_world.c source code. Here we have passed “-o hello_world” parameter to gcc. This is basically our suggested name to the executable. Otherwise, gcc will make the default executable as a.out.
Finally, run your executable as
And you will see HELLO_WORLD on the screen.