Simple CGI (bash) PASSWORD GENERATOR

#!/bin/sh
#
#  Simple CGI (bash) PASSWORD GENERATOR
#
#  todor.donev@gmail.com
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#  This  or  previous program  is  for Educational
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echo "Content-type: text/html"
echo "
<html>
<head>
<title>Simple CGI Password Generator</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="expires" content="-1">
<meta http-equiv="content-type" content="text/html\; charset=utf-8">
</head>
<body>
Generating passwords..<br><br>
<strong>tr -dc A-Za-z0-9 < /dev/urandom | head -c 25 | xargs</strong>
<br>"
length=25
tr -dc A-Za-z0-9 < /dev/urandom | head -c ${length} | xargs
echo "<br><br>
<strong>tr -cd '[:alnum:]' < /dev/urandom | fold -w25 | head -n1</strong>
<br>"
tr -cd '[:alnum:]' < /dev/urandom | fold -w25 | head -n1
echo "<br>
</body>
</html>"