dumpe2fs:tldr:cb35d

The command dumpe2fs -x ${-dev-sdXN} is used to get detailed information about the ext2, ext3, or ext4 filesystem on a specific block device, which is denoted as /dev/sdXN.

Here's a breakdown of the command and its components:

1. dumpe2fs: This is the main command that allows you to extract information about the ext2, ext3, and ext4 filesystems.
2. -x: This is an option or parameter provided to the dumpe2fs command. It instructs dumpe2fs to output detailed information about the filesystem.
3. ${-dev-sdXN}: This is a placeholder for the specific block device you want to analyze. The format /dev/sdXN is used to represent block devices in Linux, where:
   • sd: Represents a SCSI disk device.
   • X: Represents a lowercase letter (a-z) that identifies a specific disk. For example, sda, sdb, etc.
   • N: Represents a number (1-15) indicating a partition on the disk. For example, sda1, sdb2, etc.

So, you need to replace ${-dev-sdXN} with the appropriate block device you want to analyze. For example, if you want to analyze the first partition of the second SCSI disk, you would replace ${-dev-sdXN} with /dev/sdb1.