mkfs.ext4:tldr:d9e14

The command you provided is used to create a new ext4 filesystem on a partition with a specific label.

• sudo is a command used to run another command with administrative privileges (root access). It is often required for system-related operations.
• mkfs.ext4 is the command used to create a new ext4 filesystem.
• -L ${volume_label} is an option used to specify the label for the filesystem. ${volume_label} is a placeholder for the actual label you want to assign. You can replace it with the desired label for your filesystem.
• ${-dev-sdb1} is the path to the partition where you want to create the ext4 filesystem. The ${-dev-sdb1} is a placeholder as well, and it should be replaced with the actual device path of the partition. In this case, /dev/sdb1 is the device path for the partition.