File Descriptor: Linux file descriptors are non-negative integers that help in identifying an open file within a process while using input/output resources like network sockets or pipes. It can be considered as an index table of open files. A kernel creates an FD whenever it encounters an open call. each […]

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HA-Proxy HAProxy, or High Availability Proxy is used for load balancing. Load-balancer servers are also known as front-end servers. Generally, their purpose is to direct users to available application servers. A load-balancer server may have only the load balancer application (HAProxy) installed or, in rare cases, it may be an […]

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Before writing this, I wondered the same what goes on inside a shell lifecycle. It was explained to me in one of my system administration class but we certainly do not recollect everything in a graduate course. At work, I barely think before randomly typing a command, as to what […]

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The first step of the boot process is the BIOS (Basic Input Output System). 1. BIOS – Basic Input/Output System Performs system integrity checks Initializes hardware, detecting drives, USB, CD-ROMs, network cards, and any other hardware. Searches, loads, and executes the boot loader program. Go step-by-step through each boot device […]

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These terms are used wrongly in so many ways that I sometimes cringe on it. More because I am confused when to relate to what. When you are a beginner you may overlook the difference Load Balancing VS Load Sharing, but you do need to be specific when you are […]

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Many people will ask you in interviews what exactly happens when you type google.com in your browser? And they want you to go in detail as possible. Or simply: How does dns work? 1. You type google.com into the address bar of your browser. 2. Once you type it, the […]

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