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Liquid Web Knowledge Base

Knowledge Base


Administering LiteSpeed Web Server in cPanel
Filed under: Technical Support

If you are used to administering Apache on a cPanel server, administering the faster Litespeed webserver is not that much different. Litespeed transparently takes over for Apache; any configuration changes that you would normally make in an Apache configuration file or .htaccess files is still made in those files. In fact, once Litespeed is installed you can administer your cPanel server like you normally would. The few changes you would want to make to Litespeed directly can be done through your server’s Web Host Manager (WHM).

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Be Nice To Your Server: Setting Process Priorities
Filed under: Technical Support

In a vast majority of cases, Linux does a fantastic job of automatically scheduling processes. The more urgent processes are given a higher priority, and the less urgent processes a lower priority. In rare circumstances, the scheduler might not prioritize processes as you would like. For example, backup processes could be taking up resources that you would rather be used serving web pages. If you would like to regain a bit control over process priorities, the nice and renice commands will give you some.
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How To: Automate Server Scripts With Cron
Filed under: Technical Support

Servers can automatically perform tasks that you would otherwise have to perform yourself, such as running scripts. On Linux servers, the cron utility is the preferred way to automate the running of scripts.
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How To: Watch Server Logs in Real Time
Filed under: Technical Support

Servers do a fantastic job of writing down in log files what is happening right that moment. While going back and reading logs later to determine what happened in the past is helpful, it is also useful to watch logs in real time. Linux provides a command line tool that lets us do just that: tail.
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When Mod Security Attacks
Filed under: Technical Support

One component of Liquid Web’s Server Secure service is an Apache module called Mod Security (often shortened to just “modsec”). Modsec monitors all incoming HTTP requests for malicious behavior, and does not complete requests that meet certain criteria. These criteria are spelled out in what are called “rules” or “rulesets”.

In an ideal world, only malicious requests would be caught in modsec’s trap. Unfortunately, there are some instances where legitimate requests are stopped as well. How do we determine that this is what happening, and what can we do about it?
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New User Tutorial: Overview of the Vim Text Editor
Filed under: Technical Support

Many articles in this knowledge base advise editing configuration files. We usually recommend using your preferred text editor. At Liquid Web, we prefer vim. Vim, or its older sibling vi, are installed by default on nearly every server that we come across. If you do not yet have a preferred text editor, read on to see if vim might work for you.

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How To: Read An Exim Maillog
Filed under: Technical Support

One of the best tools you can use when tracking down e-mail problems is mail logs. On Liquid Web’s cPanel servers, we have turned on all of exim’s logging capabilities. Full logging means that there is a lot going on, and trying to decipher the logs can be cryptic at first. Let’s take a look at how they are composed.
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How To: Upload Files To A Server
Filed under: Technical Support

One of the most common tasks that a website owner will do is upload one or more files to their site. While it is a simple task, there are many ways to go about accomplishing it, each with their own quirks and best practices.

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How To: Give a Linux User Root-level Access Using sudo
Filed under: Technical Support

Linux has a robust permissions system. This is a very good thing, as it enables a clear separation of roles among users, especially between the root user and your average user. Sometimes, though, you might want your average user to have some or all of root’s privileges. In Linux, this is accomplished with sudo.

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How To: Back Up MySQL Databases From The Command Line
Filed under: Technical Support

While automated backups are important, sometimes you just want to take a quick and dirty snapshot before making a change to your data. When changing files in Linux, you can simply cp a file to another name, and cp it back if your change does not work out. With MySQL, it is not quite that simple, but it is by no means difficult.

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