hows resize2fs command works
 

hello
i m doing certification in RHCE. i have learn much more in Linux. now i m going towards LInux hardware programming.
i had solved enough questions about internal working of commands that r used in Linux. bt i m not understand hows resize2fs command actually work.
i kknow this command is used to shrink or extend the partion or file system.but hows that possible.
wat is the internal woring of that command.
plz tell me.

STEVE.

... then you know how the ext2 file system works right? So, what is the difference between two ext2 fs's that are different sizes? Now you know how resize2fs works... also why it has the limitations it does.