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    <p>First of all, its a bad, bad, really bad idea to have variable names declared in upper case, especially <code>PATH</code> since you would be actually re-setting the actual <code>PATH</code> environment variable (just do a <code>echo $PATH</code> in the prompt and you will understand what I mean, and this is probably one of the reasons why you had to use <code>/usr/bin/clear</code> instead of <code>clear</code> since the env variable <code>PATH</code> gets modified). So, its always recommended to use variables with lower case like <code>path</code>.</p> <hr> <p>The problem you are facing is with <code>glob</code> expansion of <code>*</code> within the subshell. When you use </p> <pre><code>./script '/home/*/public_html' php.ini module.so </code></pre> <p>the <code>*</code> is not expanded at the prompt (parent shell) but is expanded inside the script's subshell. But when you use</p> <pre><code>./script /home/*/public_html php.ini module.so </code></pre> <p>the <code>*</code> is expanded in the parent shell (which would result in one random path as pointed to by the shell) and then gets passed inside the program subshell-</p> <p>So lets say, <code>/home</code> has directories <code>/user</code>, <code>/apps</code>,<code>/data</code> doing <code>$ cd *</code> would take you to the directory which is alphabetically first i.e. <code>/apps</code>. So <code>/home/*</code> without quotes in the parent shell will always point to <code>/home/apps</code> which is not what we want!</p> <p>An immediate remedy to this is as below</p> <pre><code>$set -o noglob #unset glob expansion $./script /home/*/public_html php.ini module.so #your command without quotes &amp; wildcard */ $set +o noglob #re-set glob expansion back </code></pre> <p>or</p> <pre><code>$set -o noglob;./script /home/*/public_html php.ini module.so;set +o noglob </code></pre> <p>Try <code>$echo *</code> and then <code>$set -o noglob;echo *;set +o noglob</code> for a quick example.</p> <p><strong>Caveat</strong>- if you fail or forget to set <code>noglob</code> back (<code>set +o noglob</code>), the shell will treat characters like <code>*</code> and <code>?</code> like normal characters and will not expand them which might lead to undesirable results and confusion.</p>
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    1. CO+1 nice call on setting PATH + having to call /usr/bin/... for everything following
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