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update README
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Btrfs is a great filesystem, but its userland tools are not very user-frienfly yet.
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As a long-time user, I've developed `btrfs-list` as a wrapper to make sense out of the `btrfs subvolume list` command.
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As a long-time user, I've developed `btrfs-list` as a wrapper to make sense out of the `btrfs sub list` and `btrfs qgroup show` commands.
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You need `btrfs-list` if either:
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- You'd like to have a nice overview of your subvolumes/snapshots
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![btrfs_list](https://user-images.githubusercontent.com/218502/53362048-965b5d80-3939-11e9-8e2f-8f92c7db79e4.PNG)
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Prerequisites:
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- `btrfs-progs` v3.10 at least (Jan 2013)
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- The _quota_ feature enabled on your Btrfs filesystems (optional, to get space usage per subvolume and snapshot)
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- `btrfs-progs` v3.18 at least (Dec 2014)
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- The _quota_ feature enabled on your Btrfs filesystems (optional, to get space usage for subvolumes and snapshots)
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@ -176,7 +176,7 @@ my ($version) = $cmd->{'stdout'}->[0] =~ /v([0-9.]+)/;
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if (version->declare($version)->numify lt version->declare("3.18")->numify)
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{
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print STDERR "WARNING: you're using an old version of btrfs-progs, v$version, we need at least version 3.18 (December 2014).\n";
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print STDERR "WARNING: you're using an old version of btrfs-progs, v$version, we need at least version 3.18 (Dec 2014).\n";
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exit 1;
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}
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