** extracting multiple .tar in a single call **

kaysoh$ for i in *.gz; do tar -xvf $i; done

if you are using .gz file then replace -xvf with -xzvf.

a. macports : http://www.macports.org/install.php

b. XQuartz : http://xquartz.macosforge.org/landing/

c. sudo port install ghostscript

d. sudo port install gv

e. add +/Applications on .bashrc

terminal — settings — keyboard tab

home : \033[1~
end : \033[4~
page-up : \033[5~
page-down : \033[6~