🚀 go-pugleaf

In article <01bc310e$11b1cf20$3400a8c0@oldsys>:
|Hi There,
|
|I have been tring to work out how to program in C++ for Linux..   I manage
|to write some c++ code call welcome.C via using a editor called emacs... 
|Then I compiled the code using the g++ command e.g. g++ wlcome.C, it seemed
|to complied O.K. and created a file call a.out..   Now I am new to linux
|but if I was to run a file say something like a.exe, from DOS, all I would
|do is go to the dir where the file was and type the command "a", and the
|file would run..
|
|How would one setup linux so that the file a.out would run from a certain
|dir?

In Unix, programs don't have to have any special suffixes to be
executable.  To run a.out just type a.out to the shell (or to be sure:
./a.out). You can rename a.out to anything you like and it will still
be executable.  You can tell g++ to put the executable in a particular
name with the -o option.

Now as for where Unix (or more correctly, the shell in Unix) looks for
programs to run, it's controlled by something called a search path.
For instance in bash, PATH is set to something like:

	/bin:/usr/bin:/home/fred:.

This says, when you type a.out, try /bin/a.out, then /usr/bin/a.out,
then /home/fred/a.out, and finally ./a.out. Very much like the PATH in
the M$DOG command.com (which of course took the idea from Unix).

All this is explained in any good Unix book.