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(lively music)

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- [Instructor] Let's look at some solutions

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for those challenges.

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The first one was, do you have an ethernet

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device on your system?

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Well, we can find out about PCI devices with lspci

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and if we want to just answer that question,

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we could say, pipe that into grip ignoring case

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and look for ethernet, in case we had a lot of output.

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All right, looks like we do.

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Next question was how many CPUs?

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Well, lscpu prints a lot of information.

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Right there it says CPUs on the beginning of the line.

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So again, if we wanted minimal amount of output,

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we could do something like

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match CPU in the beginning of the line.

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And we have four.

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And then the last challenge question was,

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how many disks do you have?

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Well, LS block shows all kinds of disk information.

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And the things that are disks are called disks,

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so if we went like LS block grip disk, we could see those.

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And if we wanted to count those,

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we could pipe that in WC -l, then count the lines.

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We've got four disks on this system.