XFS Filesystem Tools (Demo)
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Video Transcription
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>> Hello, Siberians and welcome back to
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the Linux plus course here in Siberia.
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I'm your instructor Rob Gills,
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and into today's lesson we're going to be
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discussing XFS File System Tools.
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Upon completion of today's lesson,
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you'll be able to understand
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the XLS file system commands.
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We're going to use the commands xfs_info,
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xfs_repair, and xfs_admin.
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The xfs_info command is what we use to
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display file system metadata for an XFS file system,
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this is going to be common to something we
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would see EXT like tuned to FS.
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They xfs_repair command is used to
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check and repair an XFS file system.
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That's going to be equivalent to ETFSCK,
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which we would see on an EXT file system,
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and we can use the xfs_admin
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commands to change the label on a file system.
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With that, let's go ahead and check
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this out with some demo time.
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[NOISE]
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Here we are back in our CentOS environment.
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The xfs_info command is
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used to display xfs_file system metadata.
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We're going to do this on CentOS because if you recall,
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we still have that xfs partition mounted for Dev SDC1.
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Let's go ahead and run the
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>> command xfs_info on def SDC 1.
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>> Now that we've run that command, we can
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see all of the metadata for this.
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In fact, this looks very similar to what we see when
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we create the file system for the first time,
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because it displays all the same metadata
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about the file system being created.
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That is all you need to know
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>> about the xfs_info command.
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>> Let's move on and check out the next one.
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Our next command is going to be the xfs_repair command.
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In order to do a repair on an XFS file system,
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just like on the EXT file system,
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we need to unmount it first and we do
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an unmount using the u mount command.
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Remember, u mount not unmount,
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and we're going to u mount XFS.
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Now that file system has been
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unmounted and we can run a repair on it
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with XFS underscore repair [NOISE] on dev, SDC 1.
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We can see that that went through pretty quickly.
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Now, keep in mind normally in FSCK or
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an XFS repair will take a little bit longer.
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These are one gig file systems with nothing on them,
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so it's really quick,
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but that's just a demo of how you would run FXS repair.
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Now we can move on and do our next command.
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Our final command here is going to be
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using the xfs_admin command.
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For the purposes of our demo,
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we're going to use xfs_admin
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>> to add a file system label.
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>> In order to relabel or XFS permission,
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we'd have to unmounted.
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We've already done so here.
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What we can do is run xfs_admin,
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and use the capital L option dash capital
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L. We're going to call
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this XFS because we're super creative.
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We're going to call our XFS file system XFS.
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That's the label we're going to give it,
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and we're going to label dev SDC1 to
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indicate that that is an XFS file system.
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Now that label has been created and we
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can mount the file system as
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Dev CC1 is mounted to mount XFS.
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We can see the label using
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the blkid command just as we did with the X key.
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In fact we can see our EXT for label is still here,
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but now we also have an XFS label applied to dev SDC1,
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which is our xfs file system.
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That is all we really need to know about
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using the xfs_admin command.
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But keep in mind here,
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you can use a label or
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a UUID over this path to the file system,
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the device that it's on to the partition that it's on,
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in order to set up a persistent mount in FCFS tab.
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I'd still caution you and direct you to use
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a UUID if you're going to add it into FCFS tab,
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but a label is an option.
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But with that, in this lesson we covered
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common xfs file system commands which are xfs_info,
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xfs_repair, and xfs_admin.
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Thank you so much for being here,
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and I look forward to seeing you in the next lesson.
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