Home » Linux / Unix

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.

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 get your Raid type and Model. Linux Command to find out Raid Controller Type and Model lshw and lspci are…

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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. When you are running out of space on your server many system services will start failing. On this post we…

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How to Create a Custom SSH login welcome message

When you login to your Linux servers often you will see an SSH login welcome message. This messages are friendly reminders of system stats, software versions, or just a warning for external cracking intrusions. Today we will help you to create a custom SSH login welcome message for your Linux box. Create a custom SSH login welcome message Creating a…

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How to run Rsync process in background

Question: how can I run rsync process in background? Answer: rsync can be run in background by using the nohup command in front of it, and & at the end. Let’s explore how to run this command as background process in Linux. Why would I need to run rsync process in Background ? Well, I’m pretty sure that…

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Linux: Find out who is logged in to the server

Is it possible to find out who is logged in to the server from command line? Yes, it is possible using a few Linux commands. Let’s explore how to detect user names logged into the Linux server. 3 Commands to Find out who is logged in to the server w command w command prints useful information about how…

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How to: Free Disk Space Reducing Reserved Blocks

Lot of system administrators and devops use large drives to host or backup data. However, what they don’t know is that they are losing a few % of disk space on each drive. Today we will explore a tutorial to free disk space by reducing reserved blocks. This will lead to have more free disk space to be…

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Linux: Find and Kill Zombie Processes

Today we will learn about zombie processes. In particular, we will guide you to find and kill zombie processes on your Linux / Unix operating systems. What is a zombie process? On Linux / Unix  operating systems, a defunc process (aka zombie process) is a system process that has completed its execution, however it still show on the…

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