I need informations about file system
I need some textbooks (or something like that) about File Systems Technology, about Compressing File Techs, to solve some problems in my mind now :
1> what is a file ? (It's constructures) And What ways process in a file ?
2> How can i put a password into a file that just open for me only when i type an exactly password ?
3> How a rescue program do when it rescues informations that have just deleted ? How can i make a program like that?
4> About the Compressing File Techs, How can i make a compressed file with *exe tail ?
Please give me the some docs like that , or give me a link to exactly websites have them, for me to get them by myself.