Boot Options
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Video Transcription
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>> Hello, Cybrarians.
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Welcome back to the Linux plus course here at Cybrary.
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I'm your instructor Rob Goelz.
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In today's lesson, we're going
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to be discussing boot options.
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Upon completion in the lesson,
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you will be able to discuss booting from ISOs,
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you're going to understand different options
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for accessing that ISO,
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and also understand how systems can boot from NFS.
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ISO image is an image that holds the contents of a disk.
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Having that data in
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a file format rather than a physical CD
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or DVD is a much more effective method
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of distributing data.
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We may have files that are 9.9 gigs in size,
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good luck trying to fit that on a CD or DVD.
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But in the ISO format,
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we can download that and use
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that to perform operations on our system,
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we can also access the file
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remotely to install an operating system on a computer.
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There are a few methods that we can use to do so.
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Remote access to an ISO can be made via HTTP or FTP.
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Using FTP allows data to be transferred bit by
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bit and you can use the Secure Shell, SFTP,
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to tunnel that across the Secure Shell,
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SSH port 22,
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or you can also use Hypertext Transfer Protocol.
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You can use a web browser and that allows
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connections over port 80 for accessing an ISO.
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Now NFS boot is
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another remote booting method that is
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using network file systems, NFS server.
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A computer will boot with a kernel image,
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or it can get one from a TFTP server
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like we saw with PXE boot,
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and next the system will connect to that NFS server on
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the network and access
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that root file system that it needs to boot up.
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But with that being said in today's lesson,
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we covered booting from an ISO,
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we covered a few different methods that you can
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use for remotely accessing an ISO image,
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and we learned a little bit about NFS server boot.
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Thank you so much for being here and I look
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forward to seeing you in the next lesson.
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