/ – base level

/ bin :- system binaries

/ boot : – boot loader

/ dev :- listing of devices

/etc :- config files

/home :- User files

/lib :-  system Libraries

/ proce :- virtual files system , current state

/ root :- Root user home folder

/ sbin :- essential system binaries

/ tmp :- tmp storage location

/ var :- variable logs files ,mail,

/media :- removal storage (Usb)

/mnt :- mount folder for temporary file system

/usr :-  firefox, programs , users binaries , often read only.

/usr/lib :- libraries for users

/usr/local :- spacif for system

/usr/local/bin :-  store customize script