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Author: Mark Cunningham

Mark currently works as an Enterprise System Administrator, whose long-term goal is to actually turn his job into a series of tiny shell scripts. He also enjoys making things outside of cyberspace. You might find him woodworking, machining, or on a photography outing when not working on servers all day.

Reading Time: 4 minutes

Configuring Multi-User FTP with User Isolation

This article is intended to give an overview of a chroot environment and configuring your FTP service for user isolation. This is done with a few lines within the main configuration file of the FTP service.

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The error "too many redirects" means that the website keeps being redirected between different addresses in a way that will never complete. Often this is the result of competing redirects, one trying to force HTTPS (SSL) and another redirecting back to HTTP (non-SSL), or between www and non-www forms of the URL.

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This tutorial is intended to do two things: to expand on the Cron Troubleshooting article; and to give an overview of a simple scripting concept that uses the creation of a file as a flag to signify something is running. This is primarily useful when you need to run something continuously, but not more than one copy at a time. You can create a file as a flag to check if a job is already running, , and in turn, check for that flag before taking further action.

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When connecting to a server, many aspects  can cause your connection to not complete correctly. Here are some aspects to check before jumping to conclusions.

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Cron is a service for Linux servers that automatically executes scheduled commands. A cron job can be a series of shell commands, scripts, or other programs. Cron tasks or jobs can perform a variety of functions and once ran can send out an e-mail message to inform you of its completion or errors. If you receive an error, there are many ways to troubleshoot the cron task.  Use this article for troubleshooting assistance or a tutorial on the basics of cron jobs. If you would like to learn more about creating a cron job check out our Knowledge Base tutorials on the subject.

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What’s The Differences Between IPv4 and IPv6

Posted on by Mark Cunningham | Updated:
Reading Time: 5 minutes

How do IPv4 and IPv6 compare?

Both IPv4 and IPv6 addresses are used to identify a server's location and possibly identify other computers within a network. Assigned IP addresses allow those computers to find and communicate with other computers across a network.

The main difference between the IPv4 and IPv6 addresses is the number of available IP assignments each protocol can allow for or use. IPv4 provides 232, or a combination of 4,294,967,296 IP addresses and IPv6 can have approximately 3.4×1038 addresses which are a little more than 7.9×1028 times as many as IPv4! (that's a lot of math!)

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