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Everything about SWAP in Linux – why do we need swapping ?

Tags: LinuxServer Management

Published on : January 14, 2019 by

Everything about SWAP in Linux – why do we need swapping ?

Preface:

Swap space in Linux is used when the amount of physical memory (RAM) is full. If the system needs more memory resources and the RAM is full, inactive pages in memory are moved to the swap space. Swap space is located on hard drives, which have a slower access time than physical memory and is […]

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SysRq – The not so known key

Tags: Server ManagementServersSysRq

Published on : January 7, 2019 by

SysRq – The not so known key

Preface:

Lot of details about SysRq is written in the documentation available at https://www.kernel.org/doc/html/v4.11/admin-guide/sysrq.html . If you are a person who prefers the RTFM mode, please go ahead and read the above URL. What if a linux system seems unresponsive to you? For many years, as with many novices, I used to do a power reset. […]

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SysAdmin Series – Understanding the SAR Output

Tags: SARserverserver monitoring

Published on : January 1, 2019 by

SysAdmin Series – Understanding the SAR Output

Preface:

System Activity Reporter aka SAR is a part of sysstat package. SAR helps you to get and compare the historical data and that too of different metrics. SAR collects the data through two cronjobs that runs every 10 minutes and at 23:53 . SAR takes the statistics of different aspects of the machine at a […]

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How to find DIMM errors and replace the faulty RAM ?

Published on : December 20, 2018 by

How to find DIMM errors and replace the faulty RAM ?

Preface:

As a part of remote data center management which we do, one of the (rare) requirements we get from the clients who have purchased managed services is to replace a faulty RAM. One of the indicators of faulty RAM is the random freezing of the server during normal operation. You may check for the “Machine […]

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Automating AWS Infrastructure and services

Tags: aws

Published on : December 18, 2018 by

Automating AWS Infrastructure and services

Preface:

Infrastructure as a code is not something which I imagined when I started my career back in 2003. IT infrastructure has moved from hardware to software, slowly but surely. Usually, DevOps automation applies to the CI/CD source code pipelines. But infrastructure as a code has unveiled a huge and lots of scope in terms of […]

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