To run a program it is generally sufficient to type its file name. Going back to our home directory and the to the program directory, we find three files, one of which is annotated by a '*'. This usually means a file is a program. In contrast to the other files it has an x in its access permissions. This stands for eXecutable. We can run it by typing f and return.
$cd ~ $cd programs/ $ls -F d e f* $ls -Fl total 1 -rw------- 1 markst staff 0 Jan 21 17:10 d -rw------- 1 markst staff 0 Jan 21 17:10 e -rwx------ 1 markst staff 9 Jan 26 20:47 f* $f
The program will now run and do whatever it does. After it has
finished the user will be returned to the prompt. It is useful to know
that CTRL-C
will usually abort a program.