theRootDirectory.md

   /bin       Essential command binaries
   /boot      Static files of the boot loader
   /dev       Device files
   /etc       Host-specific system configuration
   /lib       Essential shared libraries and kernel modules
   /media     Mount point for removeable media
   /mnt       Mount point for mounting a filesystem temporarily
   /opt       Add-on application software packages
   /sbin      Essential system binaries
   /srv       Data for services provided by this system
   /tmp       Temporary files
   /usr       Secondary hierarchy
   /var       Variable data