Some usefull tools found for file system in Linux, Here I will write down some useful usages.
1. dd
2. dumpe2fs (only available for root)
You can get concrete infomation about the filesystem by this command.
dumpe2fs /dev/sda2 | less
dumpe2fs /dev/sda2 | grep -i 'Block size'
3. tune2fs
4. fdisk
