cp -r directory_name ~
Where directory_name is the name of the directory you want to copy to your home directory. Note that -r makes the cp command recursive and ~ is an alias for your home directory, thus this command will make a copy of the given directory_name and its contents into your home directory.
Online GL Information
There is useful online information about OpenGL that can be accessed
using the "iiv" command. iiv stands for IRIS InSight Library and
is like the "man" command, as it will provide you with
a list of the online manuals available on the SGI machines in 213.
Specifically, the OpenGL Programming Guide and OpenGL Reference Manual
are available under the section SGI_Developer.