dumpe2fs:tldr:1339d

The command "dumpe2fs -b ${-dev-sdXN}" is used to display the block usage information of a specific filesystem partition.

Here is a breakdown of the command:

• "dumpe2fs" is a command-line utility in Linux used to display information about the ext2, ext3, or ext4 filesystems.
• "-b" is an option that specifies to display the block usage information.
• "${-dev-sdXN}" is a placeholder for the actual device and partition you want to analyze. This should be replaced with the appropriate device and partition identifier. For example, if you want to analyze the first partition on a specific disk, it might be "/dev/sda1".

By running this command with the appropriate device and partition identifier, you can get detailed block usage information about the specified filesystem, including the number of used blocks, free blocks, reserved blocks, and more.