fsck:tldr:08d2c

The command fsck -fy ${-dev-sdX} is used to run a file system check on a specific disk drive, denoted as /dev/sdX. Here's an explanation of each component:

• fsck: Stands for "file system consistency check." It is a command-line utility used to verify and repair issues with a file system. It is typically used when a file system is suspected to be corrupted or has errors.

• -fy: These are options passed to the fsck command.

  • The -f option stands for "force" and is used to force a file system check even if the system deems it unnecessary.
  • The -y option stands for "yes" and prompts the command to automatically respond "yes" to any prompts for fixing errors.

• ${-dev-sdX}: This is a placeholder that represents the device name of the disk or partition you want to check. The actual device name would replace ${-dev-sdX} in the command. For example, if you want to check /dev/sdb1, the command would be fsck -fy /dev/sdb1. Make sure to specify the correct device name when using this command.

Overall, the command fsck -fy ${-dev-sdX} forcefully performs a file system check on the specified disk drive, automatically fixing any encountered errors without prompting for confirmation.