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How to copy a btrfs subvolume to another volume (partition/disk)?

The btrfs utility has two commands to write and read a subvolume to a general file, which can be a stdout/stdin too. They are ' send ' and ' receive '. Note that ' send ' and ' receive ' are designed for backup purposes. The received subvolume copy will be initially readonly. You have to normalize the copied subvolume with snapshot. Reference command sequence for copying subvolumes: 1. Create a readonly snapshot copy of the subvolume to be copied: btrfs subvolume snapshot /mnt/vol_0/sub /mnt/vol_0/sub.snapshot btrfs subvolume snapshot -r /mnt/vol_0/sub.snapshot /mnt/vol_0/sub.readonly 1. Copy the subvolume to another volume: btrfs subvolume send /mnt/vol_0/sub.readonly | btrfs receive /mnt/vol_1/ 2. Normalize the readonly subvolume copy with snapshot: btrfs subvolume snapshot /mnt/vol_1/sub.readonly /mnt/vol_1/sub 3. (Optional) Now the copied subvolume is available at /mnt/vol
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How to create Windows 10 USB setup disk from ISO using Linux?

The Windows ISO setup image downloaded from Microsoft can actually be directly extracted to a USB stick of FAT32 partition. Almost all PC today can boot this USB drive. But the new Windows 10 setup ISO image contains special a source file named  install.wim , which is larger than 4GB. So you have to split setup sources into two partitions. The first one is UEFI of FAT32 format, the second must be a NTFS partition larger than 6.5GB. That says you have to find a USB drive have at least 7~8GB. To create this Windows 10 setup USB drive, please login your Linux distro. Both Fedora and Ubuntu should work for this article. The creation steps: Open Disks Utility from your Fedora desktop and plug a empty USB drive (ensure at least 8GB). Create a FAT32 partition using the Disks Utility named UEFI of 1GB size. Create a second partition of NTFS format occupies the rest USB drive space, here we say 7GB. Download the Windows 10 ISO image from Microsoft official download page. Mount the Windows 10
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