btrfs-device:tldr:68da9

The command "sudo btrfs device usage ${path-to-btrfs_filesystem}" is used to display the usage statistics of devices within a Btrfs filesystem. Here's a breakdown of its components:

• "sudo": This command is used to execute the subsequent command with administrative (root) privileges. It allows the user to run commands as a superuser or another user.
• "btrfs": It refers to the Btrfs utility, which is a file system created to provide advanced features like snapshots, pooling, and efficient data management on Linux systems.
• "device usage": This parameter instructs the Btrfs utility to display the usage information of individual devices within the specified Btrfs file system.
• "${path-to-btrfs_filesystem}": This placeholder should be replaced with the actual path to the Btrfs file system directory or device. It refers to the path where the Btrfs file system is mounted or the device file associated with the file system.

When the command is executed, it will generate the usage statistics, such as total size, used space, and free space for each individual device within the specified Btrfs file system. These details help users monitor the storage utilization of their Btrfs file systems and devices.