Since you are using ubuntu (which is debian), it is good to remember to precede any action that requires root privileges by sudo
To delete the file, simply invoke
sudo rm <path_to_file_to_rm>
You...

I wonder whether the word "free" (not in price but freedom) would have been part of the software,OS and web development "dictionary" if it were not for this man (R.M.S).
This man is an inspiration....

On linux once you have created the source of your program using console editors (emacs,joe etc) or desktop editors depending on your desktop type then it's ready for compilation.
On windows IDE's...