GRUB/ROOT/unmount/eject

[shengchieh]

Root is one file component, i.e., /root.  There are alot of others.  See

File Structures and Types
http://www.debianadmin.com/linux-directo...rview.html (Linux Directory Structure Overview; 3/23/08)
http://en.wikipedia.org/wiki/Comparison_of_file_systems (Comparison of file systems) (Comparison of file systems; current)
http://omnitraining.net/free-articles/19...ermissions (Back to Basics: Unix File Permissions; 2/17/10)
http://www.junauza.com/2009/03/important...-that.html (Important Linux File Directories That Users Should Know About; 3/5/09)
http://www.nixtutor.com/linux/understand...ry-layout/ (Understanding the Linux Directory Layout; 2/5/09)
http://www.ibm.com/developerworks/linux/...index.html (Learn Linux, 101: Find and place system files; 6/9/10)
http://www.ibm.com/developerworks/linux/...index.html (Learn Linux, 101: Maintain the integrity of filesystems; 8/24/10)
http://www.linuxbsdos.com/2011/09/18/gui...-in-linux/ (Guide to disks and disk partitions in Linux; 9/18/11)
http://www.howtogeek.com/117435/htg-expl...explained/ (HTG Explains: The Linux Directory Structure Explained; 6/25/12)
http://www.tecmint.com/linux-directory-s...explained/ (Linux Directory Structure and Important Files Paths Explained; 9/16/13)

Grub is a bootloader.  There are others.  See

BootLoader
http://www.gnu.org/software/grub/ (non-commercial; Grub)

USB flash drive can't be ejected.  You have to physically remove them.  But CD/DVD can be ejected or unmounted.  The difference is the media is out of the computer vs just " out of the system".
It is good practice to unmounted or eject before removing an external device.  I do NOT know how LL works (someone else?) - some distros do it automatically - other distros don't - so I just do it
to avoid any mishap.

Sheng-Chieh