Published on : May 1, 2019 by Vinayan C V
Sometimes, you might have noticed high load on the CPU even though there is no unusual process running. mpstat is a useful command to monitor the CPU, it would tell you the CPU statistics. How the workload is balanced across the processors, whether a process is single threaded or not etc. The first processors will […]
Published on : April 26, 2019 by Aaden Dev
When does DNS use TCP / UDP? This is an age-old interview question. A general answer is DNS uses TCP for Zone transfer and UDP for name queries. But letʼs try to answer why is that? TCP is a connection-oriented protocol whereas UDP is a connection-less protocol. TCP requires the data to be consistent at […]
Published on : April 6, 2019 by Anitta Jose
Pipe is a method for Inter Process Communication (IPC) which send output of one process to another process. As you know, pipes are of two types: Unnamed Pipes Named Pipes Unnamed Pipe An example of unnamed pipe is as follows: $ ls | wc -l Here output of first command is given as an input […]
Published on : April 4, 2019 by Albert Reilly
CONFIGURING WORDPRESS CONTENTS TO LOAD FROM AWS CDN You may have now setup a LAMP server and may have installed WordPress by following the previous parts of the documentation. Now we will configure WordPress contents to load from AWS CDN. The steps involved are. Installing W3 Total Cache Plugin. W3 Total Cache plugin will help […]
Published on : February 12, 2019 by Anitta Jose
UDP is being a connectionless protocol, you can t reliably say that the port is open or not. Below two commands are the only way of checking the same. When you send a packet to the open port, there need not be any acknowledgment saying that the port is open. Theoretically, UDP should give a […]
