[R] installing package

[zmontaze at uottawa.ca]

Dear all,

I have prepared a package to install in R. I followed all steps explained
in  "writing R extensions".  Also I read the section "add-on package" in
"R installation and administration". These documents refer to "R CMD
INSTALL" command but I don't know how to use this command.
My specific question is where should I type this command? In help page, we
have

Use R CMD INSTALL --help for more usage information
when I type this, I have

> R CMD INSTALL --help
Error: unexpected symbol in "R CMD"

Is there something I do wrong?
Thanks in advance
Zahra Mntazeri