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We all have installed a new Centos Server and by default they do not open any port but 22 on Iptables.  To open port 80 in IPtables type

vi /etc/sysconfig/iptables

or

nano /etc/sysconfig/iptables

Then add the following rules

-A RH-Firewall-1-INPUT -m state --state NEW -p tcp --dport 80 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -p tcp --dport 443 -j ACCEPT

After saving that type

service iptables restart

To check and see if the new rules are working

iptables -L

Log in as Root
CMD # yum update
CMD # yum install gcc
CMD # mkdir /packages
CMD # cd /packages
Lets get the Daemontools
CMD # wget http://cr.yp.to/daemontools/daemontools-0.76.tar.gz
CMD # gunzip daemontools-0.76.tar
CMD # tar -xpf daemontools-0.76.tar
CMD # cd admin/daemontools-0.76
CMD # nano cd admin/daemontools-0.76
Add to the end of the gcc line
-include /usr/include/errno.h
CMD # ./package/install
CMD # cd /packages
Lets install ucspi-tcp
CMD # wget http://cr.yp.to/ucspi-tcp/ucspi-tcp-0.88.tar.gz
CMD # gunzip ucspi-tcp-0.88.tar
CMD # tar -xf ucspi-tcp-0.88.tar
CMD # cd ucspi-tcp-0.88
CMD # nano conf-cc
Add to the end of the gcc line
-include /usr/include/errno.h
CMD # make
CMD # make setup check
CMD # cd /packages
The next step is the document publication:
CMD # wget http://cr.yp.to/djbdns/doc.tar.gz
CMD # gunzip < doc.tar.gz | (cd /; tar -xf -)
Use the following script to merge in system docs:
#SCRIPT
#!/bin/sh
for i in packages commands cfunctions fileformats
do
sort -f /dev/null `find /doc/merge -name $i.html` > /doc/$i.new
mv /doc/$i.new /doc/$i.html
done
# END SCRIPT
CMD # chmod +x script.sh
CMD # ./script.sh
CMD # cd /packages
CMD # wget http://cr.yp.to/djbdns/djbdns-1.05.tar.gz
CMD # gunzip djbdns-1.05.tar
CMD # tar -xf djbdns-1.05.tar
CMD # cd djbdns-1.05
CMD # nano conf-cc
Add to the end of the gcc line
-include /usr/include/errno.h
CMD # make
CMD # make setup check
All compiling gets done.
The next step is the dns server configuration.
Lets Configure the DNScache
CMD # useradd -d /var/dnscache -s /bin/false dnscache
CMD # useradd -d /var/dnscache -s /bin/false dnslog
CMD # dnscache-conf dnscache dnslog /var/dnscache/dnscache <listen-IP-Internal>
Example:    dnscache-conf dnscache dnslog /var/dnscache/dnscache 127.0.0.1
CMD # touch /var/dnscache/dnscache/root/ip/<Net-ID>
Example: touch /var/dnscache/dnscache/root/ip/127.0
CMD # ln -sf /var/dnscache/dnscache /service/
Lets Configure the TinyDNS – if you only need it to listen to a Single IP Address
CMD # useradd -d /var/dnscache -s /bin/false tinydns
CMD # useradd -d /var/dnscache -s /bin/false tinylog
CMD # tinydns-conf tinydns tinylog /var/dnscache/tinydns <listen-IP-External>
Now it’s time to add nodes into dns database:
CMD # cd /var/dnscache/tinydns/root
CMD # ./add-ns internal 192.168.20.1
CMD # ./add-ns 20.168.192.in-addr.arpa 192.168.20.1
CMD # ./add-mx internal 192.168.20.2
CMD # ./add-host ns.internal 192.168.20.1
CMD # ./add-host mail.internal 192.168.20.2
CMD # /add-alias unagi.internal 192.168.20.2
CMD # make
CMD # ln -sf /var/dnscache/tinydns /service

Now we have 6 DNS servers with many IP ADDRESS per SERVER!!
You must first complete the Configure TinyDNS above then do the following to Create DNS for other IPs on the Server
CMD # cd /root
Lets Create a Script to Do This
CMD # nano setupdns.sh
SCRIPT #
#!/bin/sh
tinydns-conf tinydns tinylog /var/dnscache/$1 $1
echo “/var/dnscache/tinydns/root” > /var/dnscache/$1/env/ROOT
ln -sf /var/dnscache/$1 /service
# END SCRIPT
CMD # chmod +x setupdns.sh
CMD # bash setupdns.sh <Next IP>
Example: bash setupdns.sh 188.40.16.205
This Creates a TinyDNS instance for that IP Address and uses the data file and data.cab from /var/dnscache/tinydns/root

Suggest Downloading VegaDNS, its a web interface for TinyDNS
Learn More : http://vegadns.sourceforge.net/
Download : http://sourceforge.net/projects/vegadns/files/

This has been the easiest way for me to create thumbnails from flv files with ffmpeg in a php envirnment

$ffmpegpath = "/usr/bin/ffmpeg";

	function make_jpg($input, $output, $fromdurasec="01") {
		global $ffmpegpath;
		if(!file_exists($input)) return false;

		$command = "$ffmpegpath -i $input -an -ss 00:00:
                        $fromdurasec -r 1 -vframes 1 -f mjpeg -y $output";

		@exec( $command, $ret );
		if(!file_exists($output)) return false;
		if(filesize($output)==0) return false;
		return true;
	}

Then use

#extract frame at 00:00:01 as jpeg
make_jpg("/test.flv", "/test.jpg", "01");