How To Remove Old Kernels In CentOS

Ever had the the “no space left” message after trying to install a new kernel ? The thing is that by default the system will keep the old kernels there, so the best option is to set it to delete the old ones automatically. Starting from the beginning: For one self information, check how many … Continue reading →

Fixed Service Proxy

Fixed Service Proxy This service subcommand establishes a service-independent relationship between an apparent IP Address on a public interface, and an actual IP Address on the private side. Any service request from the public area that is addressed to the apparent IP Address is redirected to the actual service provider on the private network. Conversely, … Continue reading →

Port Service Proxy

Port Service Proxy This service subcommand establishes a service-specific relationship between an apparent IP Address/Port Number/Protocol (UDP or TCP) combination on a public interface and an actual IP Address/Port Number combination on a private interface. Any service request from the public area that is addressed to the apparent IP Address/Port Number combination is redirected to … Continue reading →

What’s a proxy server

A server that sits between a client application, such as a Web browser, and a real server. It intercepts all requests to the real server to see if it can fulfill the requests itself. If not, it forwards the request to the real server. Proxy servers have two main purposes: Improve Performance: Proxy servers can dramatically improve performance for groups … Continue reading →

Types of servers

Different servers do different jobs, from serving e-mail and video to protecting internal networks and hosting Web sites. Learn about the many types of servers used today. This list, courtesy of ServerWatch.com, categorizes the many different types of servers used in the marketplace today. Click on the type of server you’d like to know more about, … Continue reading →