hadi motamedi wrote: >> > Thank you for your reply. But I got its *.tar.gz package and tried > from it. Do you mean '#yum install octave' is all sufficient to > install it? Please confirm. Have you tried it? octave 3.0.x is supported by CentOS 5.x and installed from yum. You should always first try yum, then see if there is some rpm in third party repositories, and only if you do not find any compile it your self. Problem with compiling it your self is that you might not be able to resolve all dependencies. It looks like you will need ~10 additional packages, which yum will solve automatically. Ljubomir