btrfs-scrub:tldr:3cd67

This command is used to cancel an ongoing Btrfs scrub operation on a specified Btrfs filesystem.

Here is a breakdown of the command:

• sudo: This is used to run the command with superuser privileges. It allows the user executing the command to have administrative rights.
• btrfs scrub cancel: It is the command to cancel an ongoing Btrfs scrub operation.
• ${path-to-btrfs_mount}: This is the placeholder where you need to provide the path to the mounted Btrfs filesystem where the scrub operation is being performed. You need to replace ${path-to-btrfs_mount} with the actual path to your Btrfs mount point.

By running this command, you can stop a Btrfs scrub process that is running on the specified Btrfs filesystem. Scrubbing is a background process in Btrfs that verifies the integrity of data and detects any silent data errors, recovering them if possible. Cancelling the scrub operation may be necessary in certain scenarios, such as if it is taking too long or if you need to perform other tasks on the system.