Hi,
Great to see a new person joining the unix club.
On the web there are several docs to learn unix. Just try to search for them.
But, as your questions should be answered :
Where Windows has a C, D drive Unix has Filesystems.
You can see them using "df -kl" (on Solaris). The difference is that a Drive (Filesystem called under Unix) can be in the path of an excisting Filesystem. So can /var be a Filesystem containing many directories and files plus the directorie adm, which is a Filesystem on itselfes again
Unix uses variables just like Windows. Type "set" from the command prompt and from a cmd-box under Windows. You'll see the ones that are specified.
ksh/sh/csh/bash/tcsh are kind of cmd-boxes, each "Shell" has it's own habbits. So it's not the box itself that has the habbits, but it's the "command line interpetor"
that has it's own habbits. Just perform "ksh" or "csh", etc ones and see what the differences are. Most of all you need to get a bit more expert to know the differences.
root is indeed the same as what we call administrator under Windows.
Absolute path means you do not specify ../to/my/dir but you specify /homedirs/to/my/dir . So, no .. to specify upper-dir than changedir. You always start an absolute path with a "/".
Please read some docs. Cause it's way to much for me to explain it all.
Be aware that the most important command under unix is "man" if you don't know what it does, just type "man man"
Regs David