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Welcome back to this video.

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So let's quickly see some more.

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Hardware system information, commands that are useful for us.

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All right.

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So let's quickly begin with this command, which is also F.

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Now, when I type this command and hit enter, it is going to list all the open files on my Linux system.

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So when I hit enter, you can see these are all the list of open commands on to my operating system.

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Perfect.

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Now, if I want to specifically see the files which are being opened by a specific user.

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So for that I need to type the command, which is ls0f space hyphen u and specify the user.

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So let's say the user is a root currently and hit enter.

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And you can see these are all the list of files which has been opened by the user route.

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You can specify any user that you want that you are currently logged in.

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All right, so the next command is free.

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Now this command displays the free and the used memory into your computer.

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So let us type free and hit enter.

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And here you can see the memory, which is total.

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Used free shared cash and available.

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Now these numbers may look like something weird.

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So to get the output in human readable format, we are going to type the command free hyphen etch,

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which means the output is going to be shown into the human readable format.

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Now this makes sense and we can see the total memory given to this computer is 2.9 GB, out of which

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701 MB b is used.

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It it it me is three currently.

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All right.

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If you want to see the output in GB, you can just simply type free hyphen g hit enter.

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You can see the output over here, free hyphen M and you can see the output similarly like this.

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All right.

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Now, if you want to see what is the disk usage, you can simply type DU and hit enter and you will

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be able to see the disk usage onto this computer.

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Also, if you want to see the free disk space, this type DF and hit enter and you will be able to see

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the disk space into this computer.

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Now in case you want to see periodic updates of disk or memory, for that, you can simply type the

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command, watch disk, DfE, hyphen, etch in human readable format.

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And here you can see every 2.0 seconds this command will show you the periodic updates of what is the

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disk into this computer.

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You can simply come out of this by pressing control.

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C you can also see the.

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Process usage by typing the command watch top and hit enter.

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All right, let me just cancel this as well.

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I hope you guys understood how you can execute a command and you can also see the periodic updates for

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that command that is happening in real time.

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I hope you guys understood.

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Thank you.