17 Jan

Category: centos

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CentOS: “Conflicts with file from package python-crypto-2.0.1-22.el6.x86_64”

Oliver Krautscheid - Oct 19, 2015

This is another CentOS report to help fellow CentOS users. Here's a workaround for the error "Conflicts with file from package". (more…)

CentOS, Webmaster Tutorials
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How To Install Epel Repo on CentOS 6 or 7

Oliver Krautscheid - Jul 18, 2015

CentOS is one of the most reliable server operating systems. However, even CentOS does not include all RPM's required to run and administrate…

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Dev: How To Install CentOS, Nginx, MySQL, PHP On VirtualBox From Official RPM

Oliver Krautscheid - Jul 18, 2015

In this guide, I want to take a closer look at VirtualBox and how you can quickly set up a CentOS box with…

CentOS, Webmaster Tutorials
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DU: How To Validate Linux Server Backups Using Directory Size

Oliver Krautscheid - Jul 18, 2015

Rsync is a pretty reliable tool to sync files from your server to a remote server, but how would you validate that all…

CentOS, Webmaster Tutorials
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How To Install XDebug On CentOS 6.X / WHM Server, Configure PHPStorm And Forward Firewall Ports

Oliver Krautscheid - Jun 04, 2015

If you want to debug PHP sites, you need to install a great deal of programs and you need a decent IDE. In…

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Fix – Warning: RPMDB altered outside of yum.

Oliver Krautscheid - Jan 06, 2015

One message I encountered the other day when I was installing some RPM's was "Warning: RPMDB altered outside of yum.". Here's what it…

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Virtualbox: Adding internet access to your Linux machines

Oliver Krautscheid - Jan 05, 2015

Virtualbox sometimes can be a little annoying to configure, for example you need to discard saved states before enabling a NAT adapter and…

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4 Ways To Fix PYCURL ERROR 22 – “The requested URL returned error: 404 Not Found”

Oliver Krautscheid - Oct 17, 2014

The other day I wrote an article on how to fix PYCURL error 7 , but there's another more annoying error Pycurl error…

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Fix “bc command not found” on Linux/CentOS for floating point arithmetic

Oliver Krautscheid - Oct 17, 2014

The other day I wanted to perform some calculations via bash, but ended up getting an error "invalid arithmetic operator". Here's what you…

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Fix “Cannot find config.m4” / And json_pp: command not found

Oliver Krautscheid - Oct 17, 2014

For some reason PECL wouldn't install a Perl package today and I ended up getting the error Cannot find config.m4 (more…)

CentOS, Webmaster Tutorials
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How to fix pycurl error 7: Yum couldn’t connect to host

Oliver Krautscheid - Oct 11, 2014

Yum and Apt are great, but not flawless. I frequently encounter hiccups like "couldn't connect to host". Let's troubleshoot this issue (more…)

CentOS, Webmaster Tutorials
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Killing A Process On CentOS, Ubuntu And Other Linux Distributions

Oliver Krautscheid - Sep 30, 2014

As a webmaster administrating a server you may often run into errors with file and process locks - in that case it is…

CentOS, Webmaster Tutorials
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How To Import Huge MySQL Files Via Shell or PHPMyAdmin

Oliver Krautscheid - Sep 23, 2014

SQL Files can quickly become really large, sometimes up to a GB and more depending on your site. Knowing how to quickly import…

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How To Change The Hostname in CentOS 6 and 7

Oliver Krautscheid - Sep 02, 2014

CentOS7 is finally here! In this guide, I will take a quick look at how you can change the hostname in CentOS (more…)

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CentOS: See progress of copy with this tiny server utility

Oliver Krautscheid - Jul 23, 2014

Server utilities are a great way to make your life as a webmaster easier. Have you ever wanted to see the progress of…

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3 Methods To Check What CentOS Version You Are Running (5, 6 or 7)

Oliver Krautscheid - Jul 23, 2014

CentOS is the default server operating system on most Linux servers these days, but many servers still run CentOS 5, which Method 1:…

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CentOS 7: Determine if you are using 64 or 32 bit Server version

Oliver Krautscheid - Jul 21, 2014

If you are a running a server it is often important to know what version you are using, 32-bit or 64-bit. Here are…

CentOS, Webmaster Tutorials
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How To Losslessly Compress And Convert JPGs to Progressive JPGs Using JPEGtran

Oliver Krautscheid - Feb 11, 2014

Most of what we download on the web are images. In fact most websites these days rarely serve a lot of CSS or…

CentOS, Webmaster Tutorials
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How To Disable SELinux On CentOS 6.x (Possible NSA Backdoor?)

Oliver Krautscheid - Jan 07, 2014

Many no longer trust SELinux (an open-source contribution by the NSA) and rightfully want to disable it. Here's how you can quickly disable…

CentOS, Webmaster Tutorials
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Failover: Restart Or Shutdown Apache If Server Load Is Higher Than 10 (Plus APC Troubleshooting)

Oliver Krautscheid - Dec 14, 2013

I'm currently looking into possible failover strategies. Of course, you should always try to make sure you scan your error_log files for possible…