"Different Directories of Linux"

/=top most directory
/root=roots home directory
/home=users home directory
/bin=users binary program
/sbin=super users binary program
/var=Log+mail+printer directory
/usr=doc+man+program files
'/tmp=temporary files
/opt=optional files
/etc=Global configuration files
/lib=Shared library files
/boot=kernal+boot loader
/media=foreign file system
/dev=all device file