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Hey, everyone.

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Welcome back to this video.

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So the next directory that we are going to see is slash Etsy.

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Now, this is a very, very important directory for any Linux operating system.

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Why?

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Because this contains configuration files which are required by the system to run.

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Now, this directory contains the configuration files which can generally be edited by hand in any text

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editor of your choice that can be either vim or nano.

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One thing that you should note over here that the ADC directory contains system wide configuration files

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that are required by the system, and users can also modify and edit those specific configuration files

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according to their needs.

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So each configuration file is located in each user's home directory as well.

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Or in case you install any programs into this computer, the configuration files lies into those directories.

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For example, if you install Apache to web server, the configuration file will lie into slash etsi

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slash apache two slash apache conf.

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So I hope you guys understood why ETSI is used.

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So let's jump on to the practical time and let's see this in action.

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I'm onto my terminal and let me just navigate quickly to the ADC directory and you can see I am into

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the directory which is ADC with the help of the command that is PWT.

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Let me just hit list and you can see all the system level commands are over here.

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For instance, you can see pass WD or maybe you can see user add command as well.

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Here you can see VSA, FTP conf, which is the configuration file for FTP service that is been running

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into this computer.

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Let me also show you MTP icon, which is the network time protocol configuration file which has been

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installed into this computer.

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Similarly, you can find sudo as file user add, etc..

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So I hope you guys understood the system level commands that you run into your computer.

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The configuration file lies into the ADC directory, hence it is considered to be very important.

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And one note that you should not edit or delete any system level configuration files over here so that

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you do not mess up anything into the system.

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So I hope you guys understood.

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Thank you.