btrfs-balance:tldr:9b5aa

This command is used to balance a Btrfs filesystem using the 'btrfs balance' utility with superuser (sudo) privileges.

Here's a breakdown of the command:

• "sudo": It stands for "superuser do" and is used to execute a command with administrative/root privileges. This is required in order to perform certain operations that require elevated permissions.

• "btrfs": It is the command-line utility for managing Btrfs file systems in Linux. Btrfs is a file system designed to offer advanced features like snapshots, checksums, and efficient disk space utilization.

• "balance": It is a subcommand of the btrfs utility that helps balance the data and metadata across the data devices in a Btrfs file system. The balance operation redistributes the data across all devices to ensure optimal performance and disk space usage.

• "${select}": This variable should be replaced with the specific option to specify the balance criteria or filters, such as 'metadata' to balance only metadata or 'data+metadata' to balance both data and metadata.

• "${path-to-btrfs_filesystem}": This variable should be replaced with the path to the Btrfs file system you want to balance. It specifies the location of the block device or mount point of the file system.

By running this command with appropriate values for the variables, you can balance the specified Btrfs file system using the 'btrfs balance' utility.