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From: "J.O. Aho" <user@example.net>
Newsgroups: comp.lang.php
Subject: Re: problems with exec()
Date: Sun, 15 Apr 2012 19:43:09 +0200
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7segment wrote:
> Hi.
>
> I have an interesting problem and I cannot figure out what the problem
> might be.
>
> This does not  produce any output:
>
> $response = exec('ifconfig');
> echo $response;
>
> Although when I try other commands, I get a response on the screen. So I
> don't get what's so special about ifconfig.
>
> Could anyone help please?

ifconfig usually residence in /sbin (some GNU/Linux distribution are in the 
migration path of moving it to /usr/sbin), this directory  is never in a 
normal users or a daemon users $PATH, so you need to give the whole path to 
this binary to be able to run it.

By default the file is executional by all users, but someone may have changed 
permissions or setup ACL rules with for example SELinux.




-- 

   //Aho