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A comment on Btrfs has been deprecated in RHEL. Parent comment
btrfs subvolume snapshot /source/drive/folder/ /source/drive/folder/.snapshots/snapshot-`date +"%Y-%m-%d-at-%I-%M%P"`
this will create a snapshot with date and time attached to the snapshot name
you can more info here
https://btrfs.wiki.kernel.org/index.php/SysadminGuide#Managi...
make sure to remember to delete old snapshots, otherwise you'll run out of disk space and not know where it went
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btrfs subvolume snapshot /source/drive/folder/ /source/drive/folder/.snapshots/snapshot-`date +"%Y-%m-%d-at-%I-%M%P"`
this will create a snapshot with date and time attached to the snapshot name
you can more info here
https://btrfs.wiki.kernel.org/index.php/SysadminGuide#Managi...
make sure to remember to delete old snapshots, otherwise you'll run out of disk space and not know where it went