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

1: Security and realibility:

While hosting your site with any webhosting 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 criticality 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 appkications 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,

ImageMagick is a software used to create, edit, and compose bitmap images. Using ImageMagick we can read, convert and write images in a variety of formats including DPX, EXR, GIF, JPEG, JPEG-2000, PDF, PhotoCD, PNG, Postscript, SVG, and TIFF. ImageMagick is used to translate, flip, mirror, rotate, scale, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves.

ImageMagick is typically utilized from the command line or you can use the features from programs written in your favorite programming language. Choose from these interfaces: G2F (Ada), MagickCore (C), MagickWand (C)

How to install ImageMagick On Linux Server

wget ftp://ftp.imagemagick.org/pub/ImageMagick/ImageMagick.tar.gz

tar -zxvf ImageMagick*.tar.gz
cd ImageMagick*

./configure

make

make install

You can verify the installation with command :

which convert

Regards,

Tuks