Author Archive

Why does “df” show 100% used disk space after deleting files in linux?

Does this sound familiar? Your Linux file system is full, so you delete a large number of big files. However, when you check disk usage with df, the disk still shows up as being completely full. If this has happened to you, you’re not alone. Most systems administrators have experienced this at least once. Understanding

How to disable the php mail() function

Are you frustrated with random PHP scripts being able to send spam from your server? If so you’re not alone. Many website administrators have this problem with PHP scripts on their server, and it can be a time consuming game of whack a mole to deal with it. There are many reasons you’d want to

What is a good ping? Why ping speed matters for websites and gaming

Have you ever had a website load slowly, been in a game that’s lagging, or have a skype call turn robotic? One of the main causes of this is excessive latency. As latency is commonly measured with the “ping” command, this latency is often called your “ping time”. This latency measures the time it takes

What is MRC vs NRC? Understanding pricing for hosting, colocation, and internet service.

You may have seen the terms “NRC” and “MRC” on invoices or contracts for hosting, colocation, and transit services as a customer or hosting provider. What do these acronyms actually mean, though, and how do they compare to one another? You may better control your spending and manage your hosting, colocation, and transit costs by

SNI SSL? Configure Apache SSL virtual hosts with SNI to host multiple SSL certificates on one IP

In a previous article, we explored the question of whether SSL requires a dedicated IP address. We learned that, it is possible to host multiple SSL websites on a single IP address using a technology called Server Name Indication (SNI). With IP addresses becoming more expensive and scarce all the time, and SSL being all-but-mandatory

Is a Dedicated IP for each SSL Certificate still needed?

I get this question a lot: Is a dedicated IP address needed for each SSL-enabled website you host? The answer used to simply be “yes”. Luckily, advancements in web standards now allow you to run multiple SSL websites sharing a single IP address. Today’s article is relevant to anyone who runs or is thinking about

Copy Files and Directories in Linux with SSH using SCP, CP, and Rsync

As a server admin, even simple tasks can benefit from a fresh perspective. To that end, today’s article talks about multiple ways you can copy an entire directory and its files in linux. To do so, we’ll be exploring three commands: cp, scp, and rsync. cp You can copy files and folders within the same

Swap Memory in Linux | What is Swap Space exactly?

Understanding SWAP memory usage in Linux is crucial for optimizing system performance and resource management for our customer’s dedicated servers hosted here at IOFLOOD. To explain what is swap memory in Linux and how to monitor and manage it, today’s article will delve into the concept in detail. TL;DR “Swap memory” in linux is a

Where to buy IP Addresses? A simple question with a more complex answer.

One inquiry I get as a hoster is, “Where can I buy a small block of IP addresses?” The simple answer is, no, you usually cannot buy or sell individual IP addresses like you would a physical product. We’ll explain why this is the case in this blog article and go over some of the alternatives

How to Edit the hosts File in Windows and linux to Load an Example Domain from a Localhost Proxy

Editing /etc/hosts in linux In a previous post, we wrote about configuring putty ssh port forwarding. However, for this to be useful, you do need to edit /etc/hosts (in linux) or the “hosts” file (in windows) to point your target domain to 127.0.0.1. So to help you get that going, this article will show how