It should be installed in /usr/bin. To verify if it's installed, run:
To use it, run:
Code:
rdesktop -u user -g 90% xx.xx.xx.xx
where: user is the username of the windows user (usually it's Administrator), -g is the percentage of your screen that you want rdesktop to occupy and xx.xx.xx.xx is the ip address of the windows box you want to connect. For more details read the manpage
Regards