External File System Tools (Demo)
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Video Transcription
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>> Hello cybrarians and welcome back to
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the Linux+ course here in Cybrary.
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I'm your instructor Rob Gills.
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In 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 XFS 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 xfx_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 the EXT tuned to FS.
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The 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 E2FSCK,
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which we would see on an EXT file system.
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We can use the xfs_admin command
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to change the label on a file system.
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With that, let's go ahead
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and check 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 command xfs_info
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[NOISE] on dev/sdc1.
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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 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 umount command.
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Remember, umount not
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unmount and we're going to umount, mount XFS.
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Now that file system has been
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unmounted and we can run a repair on
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it with xfs_repair [NOISE] on dev/sdc1.
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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 sort of a demo of how
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you would run xfs_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 to add a file system label.
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In order to relabel our XFS permission,
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we'd have to unmount it.
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We've already done so here.
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What we can do is run XFS admin, 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 is the label we're going to give
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it and we're going to label
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dev/sdc1 to indicate that that is an XFS file system.
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Now that label has been
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created and we can remount the file system
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as dev/sdc1 [NOISE] is mounted to mount XFS.
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We can see the label using
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the Beale KID command just as we did with the EXT.
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In fact we can see our EXT forward label is still here.
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But now we also have an XFS label applied
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to dev/sdc1 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 through the file system,
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the device that it's on, the partition
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that it's on in order to
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set up a persistent mount in SCFS tab.
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I'd still caution you on directly use
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a UUID if you're going to add it into SCFS 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
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are xfs_info, xfs_repair and xfs_admin.
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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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