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Linux systems administrator Blogs


What is Linux Server Auditing, and how to do it

According to surveys, 68% of the internet runs on Linux. So, if you have a website, chances are that it runs on a Linux server.

From big cloud providers to small VPS hosters, everyone sells Linux servers by default.

The trouble is, a lot of website owners are not familiar with Linux as they use Windows or iOS in their laptop.

This unfamiliarity leads to a poorly maintained server that becomes vulnerable to malware, hackers and resource bottlenecks. (more…)

Server Maintenance Plan – Your key to a fast, secure server

Owning a server is much like owning a car.

You don’t have to be an automobile engineer to ride around in a car. It’ll take you places. You just need to fill in gas, check air pressure, and occasionally get it serviced.

In the same way, you don’t have to be a server expert to own (or rent) one and run your business apps in it.

But many server owners forget to get it routinely serviced. They pay their bills and assume all will be well.

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Top 6 best practices in Plesk server management

Top 6 best practices in Plesk server management

Plesk is one of the commonly used control panels in web hosting servers. Bobcares engineers help web hosts provide a smooth hosting experience to their customers with our efficient Plesk server management services.

Anything from an undetected hardware error to a DOS attack can impact server uptime. So regular maintenance and monitoring of servers is vital to prevent a downtime that adversely affects the customer businesses hosted in them. (more…)

E-commerce server optimization – How a Magento e-commerce website was optimized for less than 2 seconds load time

E-commerce server optimization – How a Magento e-commerce website was optimized for less than 2 seconds load time

In our previous post we covered how our Linux Systems Administrators shed 5 seconds off in website load time for a Magento e-commerce website. Here we’ll continue the discussion on how server side optimization further reduced it to a 2 second loading website.

After website optimization, we were at a 4 seconds average load time. A server performance audit showed that most of its major optimization was done right, but was not maintained properly.

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High performance e-commerce website – How a Magento e-commerce website was optimized for less than 2 seconds load time

High performance e-commerce website – How a Magento e-commerce website was optimized for less than 2 seconds load time

The call came through our emergency support channel. A Magento e-commerce website was seeing an increase in bounce rates (87%) and a dip in conversion rates. Analytics tools correlated the increased bounce rates with high page load times.

A preliminary analysis showed that the website loaded at an average of 9 seconds, with a maximum of 12 seconds in some cases. This was true user experience killer. Studies show that 51% of online shoppers cite site slowness as the top reason for site abandonment, and sites that loaded within 2 seconds decreased the bounce rates to less than 50%.

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Burning in your new server : How server hardware load testing helps us improve data center infrastructure reliability

Burning in your new server : How server hardware load testing helps us improve data center infrastructure reliability

The data was conclusive. The servers orion-47, orion-50 and orion-52 needed RAM upgrades. In the past one month their RAM usage has mostly been above 85% and was showing an increasing trend. Swap usage has grown by more than 20% and it was resulting in higher I/O wait and thereby a slight tendency for high load.

These servers were part of a load balancing cluster that served a SaaS application in a data center managed by our Dedicated Linux Systems Administrators. The occasion was our weekly review of alert trends, and corrective actions needed to prevent a performance degradation. Regular analysis of alert trends allow us to predict future resource bottle necks, and prevent service deterioration.

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Safe data recovery : Dos and Dont’s of rebuilding RAID arrays in data centers after a hard disk drive failure

Safe data recovery : Dos and Dont’s of rebuilding RAID arrays in data centers after a hard disk drive failure

It is unwelcome, it is tedious, but it is inevitable.

Every service provider dreads a hard disk crash, and the downtime it can lead to, but it is one eventuality that will happen sooner or later.

Today was one such day. A high priority alert notified our Dedicated Linux Server Administrators about a degraded RAID array in a data center we managed. Hard disk crashes are a P0 (highest priority) alert in our infrastructure management procedures, and initiates an emergency response.

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Reliable, scalable DNS – How DNS clustering and Centralized name servers resulted in fast, scalable and fault tolerant DNS service

The mood was upbeat. It was our weekly business review with a web host we support. Server improvements had resulted in zero service downtimes, and zero customer complaints on service reliability. It was time to figure out how to improve the infrastructure even further, and for that, we looked at the support requests.

Support requests give a gold mine of information on how customers are perceiving the service. Happy customers do not open trouble tickets. So, all support requests are a potential pointer to a system or process improvement. So, we started by looking at the top reasons for support tickets.

Bind Central DNS
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