Install and configure FTP server in Redhat/Centos Linux?

FTP stands for File Transfer Protocol. It was written by Abhay Bhushan and published in 1971. FTP is supported by all the operating systems and browsers. It is a client-server based protocol. How FTP works Step a: Client connects to server on port 21. Step

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SSH – How to access a remote Linux server

We feel quite handicapped not being able to run commands on our remote Linux server, this is where SSH comes in handy. Applications like the c-panel, give you control but it’s  not quite enough to do custom and ad-hoc tasks. The power of Linux comes when

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Install and Configure Munin monitoring server in Linux

Munin is an excellent system monitoring tool similar to RRD tool which will give you ample information about system performance in multiple fronts like disk, network, process, system and users. These are some of the default properties Munin monitors. How Munin works?

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Tricky question: What protocol (TCP or UDP) DNS server uses when a client queries?

By default DNS server will serve all client queries with UDP protocol on 53 port. One reason for this selection of protocol is to get faster answers from DNS Server to the client. The UDP protocol do not require any handshake like

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Domain Name Server(DNS) Evolution

History of DNS server How DNS server evolved? To understand why we require DNS server we have to go back to initial stages of networking the computers around late 1960’s and early 1970’s where it all started in Universities(especially Barkley University). Initially

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How to stop and remove/uninstall SSH server from Linux

How to uninstall SSH server in Linux Redhat/Ubuntu? Some times you in order to make your system more secure you want to stop unwanted service and remove them permanently so that your machine is not compromised. Such service include SSH, FTP etc

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Up coming posts on DNS(Domain Name System/Server) in Linux

We are very much happy to announce that we started posting on DNS client and Server stuff on our blog for this month(Jan 2011). We already have some minor existing stuff related to DNS and troubleshooting it. Below are quick links to our existing

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How to change Apache port in Linux/Unix

Q. Change the port number of Apache web server in Linux and Unix? When ever a network service is started it starts listening on particular port. For example DNS server listen on 53 UDP and TCP port and Telnet server listen on

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How to install sendmail

This is a small post on how to install sendmail in Linux Sendmail is a mail server package which most popular mail server(but not a secure and easy to configure server). Installing sendmail package. #yum install sendmail #yum install m4 Note:See our

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How to check a service is running or not in Linux?

This is a small "How to" for checking a service is running in the server or not. Some times we need to check the status of a service if it is running or not to cross verify something on server. Suppose you have

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