how to make any file executable

kratosal · 04-06-2008, 08:22 AM

ok i read that it is made by command chmod + x<filename>

but take a look at this program in perl
!/usr/bin/Perl -w
author:
modified by:
date:
Purpose: Hello World
print "hello world";
END

now first i typed this, now how will i make this file executable, do i have to first write this piece of code and then enter and then that chmod thing, well that didn’t work......... plzzzz help

jschiwal · 04-06-2008, 08:27 AM

You left out the octothorpe character and tried to run comments.

pixellany · 04-06-2008, 08:42 AM

Quote:

Originally Posted by jschiwal

You left out the octothorpe character and tried to run comments.

That is a marvelous word!!! I lived for over 60 years before learning it--and then I had to come to LQ to do so.

On the off chance that OP does not know what it means, we're looking for this:

#!/usr/bin/Perl -w

(And add # to all the lines which are not legal commands.)

kratosal · 04-06-2008, 08:43 AM

hey look man i a, just a newbie jschiwal and u were way over my head plz tell me the exact procedure, if u could........... thanx

kratosal · 04-06-2008, 09:07 AM

hey plz note there is indeed a # before every line........

plz tell me when should i use chmod thing before or after or when and exactly how

Maligree · 04-06-2008, 09:15 AM

Create the script, save it, run chmod +x your_script, run with ./your_script, where's the problem?

pixellany · 04-06-2008, 01:53 PM

Quote:

Originally Posted by kratosal

hey plz note there is indeed a # before every line........

plz tell me when should i use chmod thing before or after or when and exactly how

The "#" denotes a comment---if there is a "#" on every line, then nothing will execute.

The "#!" has to be on the first line to tell the system what language is used to interpret the script.

chmod is used to change permissions on an existing file---i.e. you first create the file, then you set the permissions.

What books have you read on all this? Now might be the time to go to http://tldp.org and get Bash Guide for Beginners, or the Advanced Bash Scripting Guide.

marquardl · 04-06-2008, 02:10 PM

Quote:

i read that it is made by command chmod + x<filename>

Remove the space between the '+' and the 'x' and use a space between 'x' and filename:

Code:

chmod +x <filename>
chmod a+x <filename> # better, as more specific

Your script will fail even so: it has a bad she-bang line and a couple non-statement lines uncommented.

Do:

Code:

#!/usr/bin/perl
print "Hello World\n"

Bye,
M

Linux Archive

kratosal · 04-08-2008, 03:50 AM

hey thanx to all for ur kind help