3) But after you said that edit the PATH , I did this. "export PATH=/opt/epics/base/bin/linux-x86_64"
And camonitor does not work in other terminal. If I edit it again on the current terminal, it works fine.
But under that terminal , when I try to do 4th step, which is runnig the Octave, there is an error that's saying it's a different path with Octave.