GNU fortran compiler

[Kirsten Menking]

I recently bought RedHat Linux for my Windows NT Machine.  It came with the
GNU g77 fortran compiler.  I am having trouble getting the compiler to work
properly.  On typing g77 filename.f the compiler acts as though it has
compiled the program.  It generates an a.out file, but the a.out file is
not executable.

I am a relative neophyte to all of this stuff and have mostly used a
Fortran 77 compiler developed by Sun for its workstations.  I did not set
up the Sun workstation on which I have been working, so I have no idea what
steps have to be taken to make the a.out executable.  Can you help?

Thanks,

Kirsten Menking