How to use Grep

Imagine you have a file. Perhaps it is a log file. It is long, and has much information in it. And buried somewhere in that file, there is one piece of information that you need to find. It would take far too long to read through the huge file. This situation cries out for some faster method of extracting that piece of information.

For this very task, Linux provides us grep.

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Who’s SSHed Into My Server?

So you know how to ssh into your server. We at Liquid Web do too. Sometimes, in the course of supporting you, we need to ssh into the server to figure out what the problem is.

But how do you know if we have shelled into your server? If more than one person is shelled into a server, and all are trying to fix a problem, it is possible that they could step on each others’ toes. It would be grand if the shell provided a simple yet mighty command that displayed all of the users who are shelled in.

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CSF: Config Server Firewall Installation

An alternative firewall to APF is the Config Server Firewall, or CSF.

CSF is generally considered a more advanced firewall as there are more configuration options compared to other firewalls, while still being simple enough to install and configure that even novice administrators can use it. This article will give you a simple overview about how to install and configure CSF and its security plugin LFD (Login Failure Daemon).

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cPanel How To: Change a Domain’s MX Record

This guide will walk you through the process of changing a domain’s Mail Exchange (MX) record(s) to point e-mail at a different server. MX records are a critically important part of a web site’s DNS because they tell the rest of the internet where to send e-mail for a domain.

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Using rsync to Transfer and Synchronize Local and Remote Systems

Rsync is a powerful tool that facilitates the transfer and synchronization of data between both local and remote systems.

File Synchronization 101: The Basics
I. Using rsync to Transfer and Synchronize Local and Remote Systems
II. How to Setup SSH Keys for Use with File Synchronization


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