SysAdmin Series – What is proc-buddyinfo?

Published on : May 4, 2019 by

SysAdmin Series – What is proc-buddyinfo?

Primary memory or Linux is not considered as a single block by Linux Kernel. Instead it is fragmented or may be a better word here would be divided or differentiated into different zones inside nodes. Zones can vary depending on the architecture. We will be considering only 64 bit for learning purposes. Nodes are how […]

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cPanel: Find Duplicate Domains in Servers

Published on : April 24, 2019 by

cPanel: Find Duplicate Domains in Servers

One of our client needed to enable DNS cluster for his web servers. Before enabling cluster we have to make sure there are no duplicate accounts in the server. In many cases, accounts were migrated across the servers and the previous ones were not deleted. So, when enabling the cluster, the DNS of the first […]

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How to take RDS Snapshots using Lambda?

Published on : April 22, 2019 by

How to take RDS Snapshots using Lambda?

Amazon Relational Database Service (Amazon RDS) is a web service that makes it easier to set up, operate, and scale a relational database in the cloud. It provides cost-efficient, resizable capacity and can manage common database administration tasks. If your site/application stores its sensitive data in the database, you will definitely want to back up […]

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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

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

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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