btrfs-filesystem:tldr:11717

The command "sudo btrfs filesystem sync ${path-to-btrfs_mount}" is used to synchronize the contents of a Btrfs filesystem with the underlying storage device. Here's an explanation of each part:

• "sudo": It is a command used in Unix-like systems to execute a command with administrative or superuser privileges. The "sudo" command here ensures that the subsequent command is executed with root or administrator level permissions.

• "btrfs filesystem sync": This is the actual command being executed. It instructs the Btrfs filesystem to synchronize its data and metadata on the specified filesystem.

• "${path-to-btrfs_mount}": This is a placeholder for the path where the Btrfs filesystem is mounted. You need to replace this placeholder with the actual path, such as "/mnt/btrfs" or "/media/mybtrfs".

When this command is run with the appropriate path, it ensures that any pending changes, such as data modifications or metadata updates, are synchronized and written to the underlying storage device. This can help to guarantee data integrity, especially if there are any pending writes or unflushed data that need to be persisted.