Linux directory help?

i am a noob to linux (installed yesterday) i am wondering what a directory is and how to change to a different one in the terminal because i im trying to install flash for linux and i need to open a file that is in the desktop so how would i do this?Linux directory help?
You use the cd command mostly like you would under Windows:

examples:

$%26gt; cd /tmp

$%26gt; cd /usr/bin



Note that under Linux the directories are separated by a forward slash (/), not a backwards slash (\) as with Windows.Linux directory help?
A directory is the same as a folder. To change to another directory in the terminal type ';cd (directory address here). cd stands for Change Directory.

A directory address should look like this : /home/bob/Desktop