e2fsck:tldr:9c0cb

This command is used to check the file system integrity of a specified partition on a Linux system.

Here's a breakdown of the command:

• sudo: It is a command that gives the user executing it administrative privileges. It is often required to run certain commands as a superuser.
• e2fsck: It stands for "ext2/ext3/ext4 file system check." It is a program used to check the integrity of a file system and repair any errors found.
• -c: This option tells e2fsck to perform a bad block scan during the file system check. It will scan the partition for any bad sectors on the disk.
• ${-dev-sdXN}: This is a placeholder indicating a specific partition on the disk. You should replace ${-dev-sdXN} with the actual device file corresponding to the partition you want to check. For example, it could be /dev/sdb1, where /dev/sdb represents the disk and 1 represents the partition number.

So, by running sudo e2fsck -c ${-dev-sdXN}, you are running e2fsck with the -c option on the specified partition to check for file system errors and bad blocks on the disk.