[emerg] (28)No space left on device: Couldn’t create accept lock
or
[crit] (28)No space left on device: mod_rewrite: could not create rewrite_log_lock Configuration Failed
Checking your disk shows that you have plenty of space. The problem is that apache didn’t shut down properly, and it’s left myriads of semaphore-arrays left, owned by my apache-user. Run:-

For CPanel :

ipcs -s | grep nobody
Removing these semaphores immediately should solve the problem and allow apache to start.
ipcs -s | grep nobody | perl -e ‘while (<STDIN>) { @a=split(/\s+/); print `ipcrm sem $a[1]`}’

For Plesk :

ipcs -s | grep apache
Removing these semaphores immediately should solve the problem and allow apache to start.
ipcs -s | grep apache | perl -e ‘while (<STDIN>) { @a=split(/\s+/); print `ipcrm sem $a[1]`}’

Part of what makes the PHP mail() function is so simple is its lack of flexibility. Most importantly and frustratingly, the stock mail() does not usually allow you to use the SMTP server of your choice, and it does not support SMTP authentication, required by many a mail server today, at all.

Fortunately, overcoming PHP’s built-in shortcomings need not be difficult, complicated or painful either. For most email uses, the free PEAR Mail package offers all the power and flexibility needed, and it authenticates with your desired outgoing mail server, too. For enhanced security, secure SSL connections are supported.

Send Email from a PHP Script Using SMTP Authentication

To connect to an outgoing SMTP server from a PHP script using SMTP authentication and send an email:

• Make sure the PEAR Mail package is installed.
  • Typically, in particular with PHP 4 or later, this will have already been done for you. Just give it a try.
• Adapt the example below for your needs. Make sure you change the following variables at least:
  • from: the email address from which you want the message to be sent.
  • to: the recipient’s email address and name.
  • host: your outgoing SMTP server name.
  • username: the SMTP user name (typically the same as the user name used to retrieve mail).
  • password: the password for SMTP authentication.

Sending Mail from PHP Using SMTP Authentication – Example

<?php
require_once “Mail.php”;

$from = “Sandra Sender <sender@example.com>”;
$to = “Ramona Recipient <recipient@example.com>”;
$subject = “Hi!”;
$body = “Hi,\n\nHow are you?”;

$host = “mail.example.com”;
$username = “smtp_username”;
$password = “smtp_password”;

$headers = array (‘From’ => $from,
‘To’ => $to,
‘Subject’ => $subject);
$smtp = Mail::factory(’smtp’,
array (‘host’ => $host,
‘auth’ => true,
‘username’ => $username,
‘password’ => $password));

$mail = $smtp->send($to, $headers, $body);

if (PEAR::isError($mail)) {
echo(“<p>” . $mail->getMessage() . “</p>”);
} else {
echo(“<p>Message successfully sent!</p>”);
}
?>

Sending Mail from PHP Using SMTP Authentication and SSL Encryption – Example

<?php
require_once “Mail.php”;

$from = “Sandra Sender <sender@example.com>”;
$to = “Ramona Recipient <recipient@example.com>”;
$subject = “Hi!”;
$body = “Hi,\n\nHow are you?”;

$host = “ssl://mail.example.com”;
$port = “465″;
$username = “smtp_username”;
$password = “smtp_password”;

$headers = array (‘From’ => $from,
‘To’ => $to,
‘Subject’ => $subject);
$smtp = Mail::factory(’smtp’,
array (‘host’ => $host,
‘port’ => $port,
‘auth’ => true,
‘username’ => $username,
‘password’ => $password));

$mail = $smtp->send($to, $headers, $body);

if (PEAR::isError($mail)) {
echo(“<p>” . $mail->getMessage() . “</p>”);
} else {
echo(“<p>Message successfully sent!</p>”);
}
?>

wget http://downloads.sourceforge.net/clamav/clamav-0.95.1.tar.gz

Extract it and move into that directory:

tar -xzf clamav-*
cd clamav*

Compile:

./configure --prefix=/usr
make
make install

Comment out examples in the config files:

replace "Example" "#Example" -- /usr/etc/freshclam.conf
replace "Example" "#Example" -- /usr/etc/clamd.conf

Get the new virus definitions:

freshclam

Then just make sure you have the latest version of the ClamAV scanner if you’re using it (this can be done from the “Manage Plugins” screen in the cPanel section of WHM).

ps -axo “%C %p” |sort -nr |head -5 |while read i p; do echo -n $i; /usr/local/apache/bin/apachectl fullstatus |grep -A 1 $p; done

there is also a python script for that : apache-top.py . you can donwload it from: http://www.fr3nd.net/projects/apache-top/. it’s a nice tool but still need some customization.

• download, compile and install ruby
• download and install RubyGems and some gems like rails and mongrel

/scripts/installruby
At this time it will install the latest 1.8 ruby:
ruby -v
ruby 1.8.6 (2007-03-13 patchlevel 0) [i686-linux]
and the following gems (using rubygems-1.1.1):
gem list
actionmailer (2.1.0)
actionpack (2.1.0)
activerecord (2.1.0)
activeresource (2.1.0)
activesupport (2.1.0)
cgi_multipart_eof_fix (2.5.0)
daemons (1.0.10)
fastthread (1.0.1)
gem_plugin (0.2.3)
mongrel (1.1.5)
rails (2.1.0)
rake (0.8.1)
This should be enough for running ruby scripts, but if you want to use Ruby On Rails from within CPanel then you just have to complete this by running /usr/local/cpanel/bin/ror_setup. If you are interested to deploy RoR environments on CPanel you can do this from inside CPanel. For more information check out the CPanel docs.