How To Install and Configure Squid as Transparent Proxy Server under Linux and FreeBSD
Squid is a proxy server and web cache daemon. It has a wide variety of uses: caching web, filtering traffic, caching DNS and other computer network lookups for a group of people sharing network resources.
Squid is primarily designed to run on Unix-like systems but it also runs on Windows-based systems. In this tutorial I'll show you how to install and configure squid proxy server to run under Linux and FreeBSD.
A proxy server software is based on the TCP/IP protocol. It monitors a special port such as 3128 or 8080. A computer who runs a proxy server software is called a proxy server. If other computer want to connect to Internet through the proxy server, it should know the proxy server's IP address and proxy port.
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How To Install and Integrate eAccelerator into PHP5
eAccelerator is an open source PHP accelerator, optimizer, and dynamic content cache which provides a bytecode cache. eAccelerator increases the performance of PHP scripts by caching them in their compiled state, so that the overhead of compiling is almost completely eliminated. It also optimizes scripts to speed up their execution. eAccelerator typically reduces server load and increases the speed of your PHP code by 1-10 times.
1. Install prerequisites
There is no eAccelerator package in the official repositories, therefore we must compile and install it from the sources. Before we can do this, we need to install some prerequisites.
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How To Update all CentOS/RHEL servers remotely using a shell script
#!/bin/bash
#
# A simply shell script to update remote CentOS/RHEL servers
# You must have ssh public and private key installed. This will save a lot of time if you
# have many servers.
#
# by Adi https://blog.up-link.ro
# May 2010
# an array to store ssh commands for each server
hosts=(
"ssh root@192.168.1.1 yum update -y"
"ssh root@192.168.2.1 -p 2222 yum update -y"
"ssh adi@192.168.3.1 -t sudo '/usr/bin/yum update -y'"
)
# read the array and launch the ssh command
for sshcmd in "${hosts[@]}";do $sshcmd;done
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How To Update CentOS Linux 5.4 to CentOS 5.5
CentOS ( Community ENTerprise Operating System ) is a community-supported, mainly free software operating system based on Red Hat Enterprise Linux. It exists to provide a free enterprise class computing platform and strives to maintain 100% binary compatibility with its upstream distribution.
CentOS 5.5 has been released and available via mirrors for immediate update. For more information about this release you can read the release note.
If you have CentOS 5.4 already installed, before to do anything first back up anything you care about.
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How To Install Lighttpd with PHP5 and MySQL support on CentOS 5
Lighttpd is an open-source web server optimized for speed-critical environments. It's standards-compliant, secure and flexible. In this tutorial I'll show you how to install Lighttpd on a CentOS 5.4 server with PHP5 support (through FastCGI) and MySQL support.
1. Installing MySQL 5 Server
To install MySQL run this command from the shell:
# yum install mysql mysql-server
Enable MySQL server on boot and start MySQL server:
# chkconfig --levels 235 mysqld on
# service mysqld start
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How To monitor Apache traffic in real-time with apachetop
Apachetop is a very useful program that displays the stats for Apache in real time. Apachetop can show you how many requests per second are coming in, what files have been accessed and how many times. It can also show you who is hitting the sites and where they are coming from.
1. Installing apachetop
To install apachetop in CentOS, Fedora:
# yum install apachetop
Make sure you have DAG repository enabled.
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Installing PowerDNS with MySQL backend and PowerAdmin On CentOS
PowerDNS is a MySQL-based DNS server, written in C++ and licensed under the GPL. PowerDNS can be managed through a web interface (PowerAdmin). This guide shows how to install it on CentOS 5.
1. Installing MySQL
# yum -y install mysql mysql-server
2. Enable MySQL on boot and start MySQL server
# chkconfig --levels 235 mysqld on
# service mysqld start
Make sure the MySQL server is running:
# netstat -tap | grep mysql
tcp 0 0 *:mysql *:* LISTEN 28179/mysqld
3. Set password for user root
# mysqladmin -u root password your_password
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