on my suse linux, there is no compress and uncompress command. however, a program need these command to be installed properly. my question is how i can install these command and where to find them, thanks!
I have not tried Suse,
but whatever be the flavours I suppose these commands would be present 
Can you please try running a search on the paths where commands would be stored?
that's a pointer
What about (compress, uncompress) equivalent (zip,unzip)commands?
adding gzip and gunzip too
I have gzip and gunzip, but the program use compress and uncompress.
What is the output of the command " find / -name compress " ? (it may take awhile) Also, can you post the output of " uname -a " and " echo $PATH "?
if it is not on the system, then you may need to install a separate package for it. Call the vendor and open a case and get the package from them. i know on really basic custom builds, you miss out on a certain set of commands.
-S