How do I check samba's version in RedHat 9?
 

?????????

as root:
smbd -V

Strange doesn't work...............

Do you know how I can open samba in terminal?

open a terminal
su -l
cd /usr/sbin
./smbd -V

if it don't work, make sure you have samba installed.
try
rpm -qa |grep samba
and watch out for samba-X.Y.Z (X.Y.Z is a addition number(mostly version number))
other way to locate where your smbd is (in case you have samba installed(proved above)):
rpm -q --fileprovide samba-X.Y.Z |less |grep smbd