Dear All I downloaded the octave-3.4.2 and tried to install it on my centos 5.6 as the following: #./configure But it prompted for lack of a c compiler, so I tried to install gcc first and then re-executed it and it was successful. #make But it prompts as "No targets specified and no makefile found". #make install But it prompts as "No rule to make target 'install'". I had the same steps for installing applications when I was on my centos 5.0 machine. Can you please let me know what is wrong my case? Thank you