why some of my commands not found
i m new to linux. i have downloaded redhat 7.2 from redhat ftp, and installed successfully on my laptop from my cdrom. i read the "getting started" online guide provided by redhat to learn how to use linux redhat, but i when i type commands such as "mkbootdisk" and "shutdown" the shell gives me an error message: command not found. could any one tell me whats wrong? thx.