11-29-2000
Hi,
Welcome to the Unix world.
Your question is a bit general..
So I'll start with a tip:
Unix has a command called "file".
you type : file filename
and get seme info what type of file it is...is it text file?
executable? what kind of executable ?
Executable file is a file that can be run and perform some computing task. (hope that's close to the academic definition)
All executable files need to have permission +x turned on in order to be run.
Unlike text files and scripts (files written in readen language which can also be run), executable files are mosty referd to binary files, their content is not readable to humans and contains directions in binary format for the machine to run.
To run an executable file you simply type its name.
to create an executable you need some sort of compiler to create binary code.
For an executable SCRIPT. you should edit your code and follow the format it uses.All scripts first line should start with calling the interpter line like these examples:
#!/usr/bin/perl
#!/bin/sh
Hope that helps,
Hezki
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GZEXE(1) General Commands Manual GZEXE(1)
NAME
gzexe - compress executable files in place
SYNOPSIS
gzexe name ...
DESCRIPTION
The gzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a
penalty in performance). For example if you execute ``gzexe /usr/bin/gdb'' it will create the following two files:
-rwxr-xr-x 1 root root 1026675 Jun 7 13:53 /usr/bin/gdb
-rwxr-xr-x 1 root root 2304524 May 30 13:02 /usr/bin/gdb~
/usr/bin/gdb~ is the original file and /usr/bin/gdb is the self-uncompressing executable file. You can remove /usr/bin/gdb~ once you are
sure that /usr/bin/gdb works properly.
This utility is most useful on systems with very small disks.
OPTIONS
-d Decompress the given executables instead of compressing them.
SEE ALSO
gzip(1), znew(1), zmore(1), zcmp(1), zforce(1)
CAVEATS
The compressed executable is a shell script. This may create some security holes. In particular, the compressed executable relies on the
PATH environment variable to find gzip and some standard utilities (basename, chmod, ln, mkdir, mktemp, rm, sleep, and tail).
BUGS
gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases,
using chmod or chown.
GZEXE(1)