The moment you learn a command in Linux on one distribution (version), it means you've learnt that same command for ALL Linux distributions! The commands we're talking about here are the very popular GNU / Linux commands that are common to every distribution, including: Red Hat, Fedora, Ubuntu, Kubuntu, Edubuntu, Slackware, Debian and openSUSE. These are the essential commands required for Linux System Administration, like the cd, ls, cp, rm, pwd and mkdir commands.

3 Reasons for Learning How to Use Linux Commands in Multiple Distributions
It is very important to learn Linux commands in multiple (all if possible) versions because of the following reasons:
  1. Your Company May Change to a Different Linux Distribution
    Even though the basic commands as the ones listed above perform the same function throughout all the different Linux versions, the distributions keep changing constantly and one needs to be acquainted with the other deeper commands. If you work in a company that is currently using just one distribution, the company may change to a different one.
    By learning these commands, you are learning how to use Linux in all distros at once! Except for a very few differences in the way that a very few commands work, the GNU / Linux commands are virtually identical from one distribution to another.
  2. You May Start Working at a Company that is Using Multiple Linux Distributions
    If you change jobs, you may be working at a company that uses multiple Linux versions. For example, a company may use one distribution for one purpose, such as a web server, and use a different one for another purpose, such as a firewall. When you get training that focuses on commands, you learn to work with all Linux distributions, regardless of what the version is being used for.
  3. You Don't Know What Linux Distribution You'll Be Using When You Get Hired After School
    If you are currently getting Linux training at a college, university or technical school, you don't know what version you'll be using when you finish. So why not focus on learning commands and then you will be able to use any distro?

How can you get Linux training to learn commands in multiple distributions?
Easy! Just get some excellent Linux training videos that are presented by an experienced Instructor, and show you how to use commands in several popular distributions. It’s usually rare, but available.

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