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Best Linux Tutorials

Find the best Unix and Linux Tutorials for both newbies and advanced users. All our Linux tutorials are based on the most stable Linux OS we use: CentOS and RHEL operating systems.

But on some guides, we will also write and post solutions for Ubuntu and Debian systems, that are very well known inside the Linux community.

Grep case sensitive examples and usage

grep is one of the most useful tools to find text characters, words and phrases inside your Linux box.  Today we will show you how the correct usage of grep case sensitive parameter to find the exact information…

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eth0 NIC Link is Down error on Linux

This error has happened to me a few times in the past years. The network suddendly gets frozen and then it cames back after a few seconds, on other times it gets frozen and the only way to…

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Linux Jpeg Image Optimization Command

Days ago we wrote a very useful tutorial on how to optimize / compress PNG files on Linux using the fantastic optipng command. However, lot of users have JPG / JPEG files also, which are widely used for…

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Find RAM size in Linux

When you order a dedicated server or cloud server with your web hosting provider, there is one thing you must check always when you first login into your system: your hardware must be exactly the same as ordered….

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How can I Disable CPU Frecuency Scaling?

As a web performance addict, I’m always looking for ways to improve system performance and speed web applications. And today I will share with you the magic of CPU frecuency scaling, and a practical how to guide to…

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Find out RAID Controller Type and Model on Linux

Sometimes you need to find out RAID controller type and model on Linux servers, and this can become a tricky situation if you don’t know the right commands. On this post we will explore exactly that, how to…

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Bash: No space left on device

If you get this error on your Linux web server: -bash: No space left on device , that means there is no space left on some of your Linux partitions and you need to free up disk space asap….

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