The Helpdesk For I.T. Administrators
This guide will step you through the process of installing HAProxy on CentOS 6. To install HAProxy on CentOS 6 you first need to set up your installation to use the epel software repository. HAProxy is not available in the default CentOS repositories. (Note: All commands below require root privileges.) rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-7.noarch.rpm You can …
This howto will step you through the process of setting up the required software to be able to check the status of a Compaq or HP Smart Array and the attached physical and logical drives on CentOS 6 or RHEL. The required program to be able to talk to the Smart Array is called ‘hpacucli’, …
The lspci command, which can be found in the pciutils package, is a great tool for finding information on the devices in your PC. the lspci command will allow you to get the model number/chip details for devices such as network interface cards, sound cards, raid cards, etc. To install pciutils on CentOS/RHEL using yum: …
If you are setting up a new virtual server (eg. on Rackspace / any VPS provider), the first thing you will want to do after creating the server, is to check the IP address you are assigned against known blacklists. If you find that your new IP address is on one of these lists, rather …
By default IIS 7 will generate a new session when accessing a site over a secure HTTPS connection. This can cause issues if you are switching between a HTTP and a HTTPS connection when dealing with a site that handles logged in users via sessions. Luckily this is a easy fix. Open up the Internet …
This guide shows you how to restart a specific IIS 7 web site from the command line. This can come in very handy if you need to automate restarting the site. IIS 7 includes a command line management tool called “appcmd.exe” which allows you do do a wide range of tasks, including stopping and starting …
When using Nginx as a reverse proxy you may want to pass through the IP address of the remote user to your backend web server. This must be done using the X-Forwarded-For header. You have a couple of options on how to set this information with Nginx. You can either append the remote hosts IP …
Have you ever replaced a network card on Ubuntu and found that it is now appearing as eth1, instead of eth0? Or simply wanted to swap the numbering of two network interfaces? This guide shows you how to do just that. Ubuntu uses the udev dynamic device management system, and automatically keeps track of what …
For computers to communicate with each other over a network, they need to be able to know how to convert a IP address, into the physical address of the network card (MAC address). If your computer doesn’t have the MAC address for the specific host you are trying to communicate with, your computer will send …
Ensuring you have a secure, and hard to guess MySQL root password is critical on production servers. If you don’t currently have a strong MySQL root password, please update it using the details below. Likewise, if you think someone may know the password, who shouldn’t, change the password immediately. Run the following SQL statement on …