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Custom Email Filtering across cPanel Server

Published on : May 18, 2019 by

Custom Email Filtering across cPanel Server

Preface:

Using a custom filter with custom rules to discard emails considered spam across the whole server. HOWTO Exim uses a global file to set filters for all the accounts in a server, but they contain just some default rules. We can add new rules to this file and make filters to work across the server. […]

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How to Keep your Email out of the Spam?

Published on : May 16, 2019 by

How to Keep your Email out of the Spam?

Preface:

No one would be liking their mails being marked by the recipients as spam. Though there are various reasons as of why the mails could be marked as spam, this article contains helpful information to make sure that other servers or network do not mark your email as spam. Use Email Authentication (cPanel >> Email […]

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Applying Kernel Patch Without Rebooting

Published on : May 11, 2019 by

Applying Kernel Patch Without Rebooting

Preface:

As a System Administrator, server uptime has much importance. The servers must be running as long as possible. While keeping this server uptime consistent, a System Administrator should also have to apply the patches and to maintain the reliability. If the patch is done for the kernel there may be a chance to reboot the […]

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Hangwatch – the watcher and the actor, all rolled into one.

Published on : May 7, 2019 by

Hangwatch – the watcher and the actor, all rolled into one.

Preface:

NMI Watchdog is something you would have heard of. NMI or Non Maskable Interrupt, is a type of interrupt which the CPU cores canʼt ignore. Other type of interrupts, can be routed to different CPUs depending on its workload, while a NMI interrupt canʼt be passed on and has to be handled by the CPU […]

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SysAdmin Series – What is proc-buddyinfo?

Published on : May 4, 2019 by

SysAdmin Series – What is proc-buddyinfo?

Preface:

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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