[Fri Oct 10 00:11:01 2008] [warn] pid file /usr/local/apache/logs/httpd.pid overwritten — Unclean shutdown of previous Apache run?
semget: No space left on device

This error occurred because there is no more space left in Semaphore Arrays for Apache.

You can check semaphore arrays on your server using the following command .

# ipcs -s

If you see too many of them, run the script as given below

#for i in `ipcs -s | awk ‘{print $2}’`; do ipcrm -s $i;done

Now restart Apache services

# service httpd startssl

Now Fixed….

With cpanel Linux Dedicated Server we are getting following error

error : [notice] child pid x exit signal File size limit exceeded (25.)

This error occurs due to log file limit exceeded on server. On linux 32 Bit server apache support maximum filesize upto 2GB. If any log file exceeded this limit then you will get above error and apache services het hanged
TO get it resolved you need to log files with following directories
/usr/local/apache/logs and /var/log/

To get it resolved you need to emptied your log files those are above 2GB

How to access Awstats from outside the control panel ?

Accessing Awstats from outside the control panel is easy.

Step 1.

Download awstats from awstats.sourceforge.net

Step 2.

Uncompress awstats-5.6.tgz

Step 3.

Copy the contents of the uncompressed cgi-bin folder from your hard drive to the user cgi-bin directory (this includes awstats.pl, awstats.model.conf, and the lang, lib and plugins sub-directories).

Step 4.

If necessary (should not be needed with most setups), edit the first (top-most) line of awstats.pl file that is

#!/usr/bin/perl

to reflect the path were your Perl interpreter is installed. Default value works for most of Unix OS, but it also might be #!/usr/local/bin/perl

Step 5.

Move AWStats icon sub-directories and its content into a directory readable by your web server, for example /home/users/public_html/icons

Step 6.

Copy awstats.model.conf file into a new file named awstats.myvirtualhostname.conf.

This new file must be stored in /home/user/public_html/cgi-bin.

Step 7.

Edit this new config file with your own setup :

- Change LogFile value with full path of your web server log file (The path is: LogFile=”/usr/local/apache/domlogs/domain.com”).
- Check if LogFormat has the value “1″ (it means “NCSA apache combined/ELF/XLF log format”).
- Change DirIcons parameter to reflect relative path of icon directory. (DirIcons=”/icons”)
- Edit SiteDomain parameter with the main domain name or the intranet web server name used to reach the web site to analyze (Example: www.mydomain.com).

IMPORTANT!
- Change DirData to use the same Statics file than Cpanel Awstats and do not loose any entry.
(DirData=”/home/user/tmp/awstats/”)

Step 8.

Access AwStats by the URL:
www.domain.com/cgi-bin/awstats.pl?config=domain.com

Done!!!

The AwStats will refresh the Statics every 24 Hours.

Is it possible to allow users to update Awstats from the Cpanel?

Yes, Change the parameter “AllowToUpdateStatsFromBrowser” in /usr/local/cpanel/etc/awstats.conf set to 1,

AWStats add a button on report page to “update” statistics from a web browser. This is not a good idea, because Update process can be long so you might experience “time out” browser errors if you don’t launch AWStats enough frequently. Also, it take around 12-24 hours to take into effect.

There is an option in WHM>> Server Configuration >> Tweak Settings>>Stats and Logs to “Allow users to update Awstats from cPanel“.

How to update Awstats and webalizer via shell?

We could update the webalizer using the command /usr/local/cpanel/3rdparty/bin/english/webalizer -N 10 -D /home/username/tmp/webalizer/dns_cache.db -R 250 -p -n domain.com -o /home/username/tmp/webalizer /usr/local/apache/domlogs/domain.com

The Awstats can be updated by using the script /scripts/runweblogs accountname

Is it possible to view webalizer stats without login to cpanel?

Yes. Do the following steps.

cd /home/username/www
ln -s ../tmp/webalizer stats
chown username.username stats
cd ../tmp
chmod 755 ./
chmod 755 ./webalizer
—————-
will allow domain.com/stats/ for viewing stats without logging in to cpanel

Spam emails is nothing but flooding  Internet with many copies of the same email messages or legitimate emails . We can also called it as junk emails . It is very frustrating when we receive spam emails in our inbox. Many spammers use various tricks to send spam emails to unknown email addresses like anybody@domain.com , main@domain.com etc . If you are have a web hosting account with cpanel as your control panel then you can easily avoid spam emails using “Default Address” option.

By default all your unrouted emails are received in your main users inbox.

So you can avoid it by adding the following line in your cpanel >> mail >> default address option

•  :fail: no such address here

You can also avoid spam emails using email filtering.

Cpanel >> Email Filtering  >> add filter

Here you need to use your own filtering techniques like filter spam emails with specific subject, email address, contents, message ID etc.

While choosing web host you need to consider following important factors of web host.

1: Security and reliability:

While hosting your site with any web hosting provider you must be sure that the servers are fully secured and reliable for your applications. That starts from basic website data protection especially hacking attempts are an important watch-point for web developers while selecting an host.

Security in terms of firewall, security patches, tweaking on server configurations to avoid hacking process,denial of service attacks (DDOS) etc.

Hosting provider or ISP is completely responsible for regular upgrades as well as security measures that are taken on a web server and lastly, daily / weekly backups are also part of their hosting packages to recover from any critical issues.

2:Customer Service

Customer Service is another important concept hosting business. Various Hosts offer a variety of customer services to attract customers. You need to sure that your service provider has 24X7 support on chats, phone and email. Technical expertise and experience are part of customer service.

3:Server Software

UNIX and Windows NT are the most common server software environments provided by hosting provider. server software can also affect a website with their limitation and restrictions. Your web developer should be aware of applications they will be using and assess which software environment will best suit their needs.

4: Internet Connection used by host:

Internet connection is very important while choosing hosting provider.
There are a bunch of variations T-1, T-3, OC-3 etc. A company that offers a T1 connection to the Internet can only allow 1.544 Mbps , T3 can allow up to 45 Mbps. An OC-256 can allow 13,000 Mbps, having ability to transfer much more information at a higher speed before getting down.

5: Speed:

Server performance and integration with software applications. How fast can they respond to your request ? When we speak of server speed, it clearly means that bandwidth and network connections are an important part. A server that is a host to many sites that are being accessed simultaneously may get bogged down. No matter how fast the connection is this can seriously slow down a viewer’s speed of browse a site. You can easily test the speed at which a server responds by “pinging” a site from your command prompt. Processor speed is also important. video and audio Streaming, forums and message boards, and highly animated applications all require huge amounts of memory and fast access to the main server. Overloaded processors can slow down a site’s transmission .

PHP and Apache are not being able to track which users are sending out mail through the PHP mail function from the nobody user causing leaks in formmail scripts and malicious users to spam from your server without you knowing who or where.

Monitiring exim_mainlog doesn’t exactly help, you see th email going out but you can’t track from which user or script is sending it. This is a quick and dirty way to get around the nobody spam problem on your Linux server

If you check out your PHP.ini file you’ll notice that your mail program is set to: /usr/sbin/sendmail and 99.99% of PHP scripts will just use the built in mail(); function for PHP - so everything will go through /usr/sbin/sendmail
Requirements:

We assume you’re using Apache 1.3x, PHP 4.3x and Exim. This may work on other systems but we’re only tested it on a Cpanel/WHM Red Hat Enterprise system.

Step 1:

Login to your server with root.

Step 2:
Turn off exim before proceeding
service exim stop

Step 3:
Take the Backup of your original /usr/sbin/sendmail file

mv /usr/sbin/sendmail /usr/sbin/sendmail_bak

Step 4:

You need to Create the spam monitoring script for the new sendmail.
pico /usr/sbin/sendmail

Paste in the following:

#!/usr/local/bin/perl

# use strict;
use Env;
my $date = `date`;
chomp $date;
open (INFO, “>>/var/log/spam_log”) || die “Failed to open file ::$!”;
my $uid = $>;
my @info = getpwuid($uid);
if($REMOTE_ADDR) {
print INFO “$date - $REMOTE_ADDR ran $SCRIPT_NAME at $SERVER_NAME n”;
}
else {

print INFO “$date - $PWD - @infon”;

}
my $mailprog = ‘/usr/sbin/sendmail.hidden’;
foreach (@ARGV) {
$arg=”$arg” . ” $_”;
}

open (MAIL,”|$mailprog $arg”) || die “cannot open $mailprog: $!n”;
while (<STDIN> ) {
print MAIL;
}
close (INFO);
close (MAIL);

save and close

Step 5:
Now change the new sendmail permissions
chmod a+x /usr/sbin/sendmail

Step 6:

Create a new log file to keep a history of all mail going out of the server using web scripts
touch /var/log/spam_log

chmod 0777 /var/log/spam_log

Step 7:
Start Exim up again.
/etc/init.d/exim start

Step 8:
You can Monitor your spam_log file for spam, try using any formmail or script that uses a mail function - a message board, a contact script.
tail - f /var/log/spam_log

Reference taken from : webhostgear.com

Hello,

To get the apache version on Linux Server we have to use following command.

# /usr/local/apache/bin/httpd -v

To get the php version on Linux Server we have to use following command.

#php -v

you can get the php modules install on server with command #php -m
To get the mysql version on linux server we have to use following command.

#mysql -v

For installing the SSL certificate you need to have a dedicated IP Address, and make sure that your domain is registred domain name and resolving perfectly

Step 1: You need to generate CSR (certificate signing request ) from your webhost manager. which required following information.

———————————–
- Host to make cert for:
- Country(2 letter Abbreviation):
- State:
- City:
- Company Name:
- Company Division:
- Email:
- Password:
———————————–
Also please create webmaster@yourdomain.com (replace yourdomain.com with the domain that you want the SSL certificate to be setup for) and provide us with its password so we can complete the installation process.

After CSR generation you will get the CSR and RSA key

step 2: With the help of RSA key you need to purchase SSL certificate from any of SSL provider such as COMODO ,instant SSL

step 3: Once you got the SSL cerificate then you need to provide that certificate to hosting provider so the hosting provider will install SSL cerificate from WHM >> SSL/TLS >> Install a SSL Certificate and Setup the Domain option.

To stop other sites directly linking to your images and media files and stealing your bandwidth You need to add following code in your .htaccess file

RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(www.)?domain.com(/)?.*$ [NC]
RewriteRule .*.(gif|jpg|jpeg|bmp|wmv)$ http://www.domain.com/image.jpg [R,NC]

Note: replace your website with domain.com