Resource Management : Tcp Dump

Analyzing network details is very important for a system admin. As a application server admin there are cases where I need to analyze the network details in order find the reasons for the slow performance. Tcp Dump in Linux machines is a very use full network packet analyzer. It comes in many flavors of Linux systems. The tcpdump command should be issued as a root user or we need to make sure to have sufficient privilileges...

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Wire Shark : Packet Capturing Tool

Wire-shark is a network analysis tool which captures network packets in real time. They are captured in human readable format. The tool is formally called as Ethereal. Wire-shark includes filters, color indicators and many other features that lets admin to dig into the network traffic and see what’s going on This article is a brief...

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Vi and CTRL + S

As a System administrator I use Putty almost every day. There are cases where I try to save the file opened in a vi editor using CTRL+S and I do this when I open the file in Putty. When I press the CTRL+S , putty seems to be hang without accepting any of the key board commands. I have to kill the Putty and start it again. So what exactly happens here is when we press CTRL + S , it actually does a XOFF which means terminal will...

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JON CLI Basics

JON ( JBoss Operations Network) is a very use full tool in monitoring , managing redhat Products. It can be use full in monitoring various resources like operating system metrics, JBboss , tomcat and also apache web servers. Many details regarding the under lying components can be obtained using the JON console. JON can be exposed using its remote api provided. Clients can be coded to access the jon using the api. These...

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