fsck:tldr:514f8

The command sudo fsck ${-dev-sdXN} is used to run a filesystem consistency check (fsck) on a specified device.

Here is a breakdown of the command:

• sudo: It is a command that allows a user with administrative privileges to run a command as a superuser or another user. It may prompt for the user's password.

• fsck: It stands for filesystem consistency check. This command is used to check and repair inconsistencies in a filesystem.

• ${-dev-sdXN}: This is a placeholder for the actual device name and partition number. In Unix-like systems, a device is typically represented as /dev/sdXN, where X is a lowercase letter signifying the storage device (e.g., a, b, c) and N is a number representing the partition.

To use this command, you need to replace ${-dev-sdXN} with the actual device name and partition number you want to check. For example, if you want to check the first partition (/dev/sda1), the command would become sudo fsck /dev/sda1.