The LDAP Directory Structure Like X.500, LDAP directory entries are arranged in a tree structure. Under the root, there are branches that represent countries, organizations, organizational units, and people. In complicated LDAP deployments, in which you have to exchange information with the LDAP databases of other companies, you may want to get a formal organization […]

1. Introduction PPPoE stands for Point to Point Protocol over Ethernet. It is an OSI Layer Two protocol which uses the PPP (Point to Point) protocol to connect a client system to a server system in a one to one network link. All traffic for a PPPoE connected client must go thru the PPPoE server […]

Each distribution has some specific tools to build a custom kernel from the sources. This article is about compiling a kernel on CentOS systems. It describes how to build a custom kernel using the latest unmodified kernel sources from www.kernel.org (vanilla kernel) so that you are independent from the kernels supplied by your distribution. It […]

ntop is a network traffic tools that shows network usage in a real time. One of the good things about this tool is that you can use a web browser to manage and navigate through ntop traffic information to better understand network status. Also Ntop monitors and reports hosts traffic and supports these protocols: TCP/UDP/ICMP […]

A common task for System Administrators is to monitor and care for a server. That’s fairly easy to do at a moment’s notice, but how to keep a record of this information over time?  One way to monitor your server is to use the Sysstat package. Sysstat is actually a collection of utilities designed to […]