How To Install and Configure Rocket.Chat on CentOS

Rocket.Chat is one of the most feature-rich open-source Slack alternatives, featuring group chat, direct messaging, private rooms, desktop notifications, media embedding, link previews, file uploading, voice/video chat, screensharing, and more. There are native applications for Windows, Mac, and Linux, as well as mobile applications for iOS and Android. Developers can also use hubot to integrate […]
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How to skip updating certain packages by YUM

I’m runing RHEL/CentOS for a group of database servers, and they mainly use MySQL for productive services. Recently I noticed that MySQL’s new feathers and bug fixes that comes from system updates make little sense to our needs, so I’m planing not to apply these changes on our live servers, unless it’s really needed.
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Avoid IP conflicts in Xen DomU

Recently I’m playing with Xen virtualization, and I came across one protential problem. As I need to share my guest machines to clients,  I must give them root privileges… that’s whats VPS-es all about… having root access to OS without having to purchase expensive physical ones.  So having that in mind they are by default […]
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