Hi,
Thanks for using 3DNA, and for posting your setup question on the Forum.
From the subject line, I assume you are on Mac OS X (even though the procedure should be the same for Linux). You've run the x3dna_setup script successfully. You did not paste the full output from running the setup script. However, from the two lines of output (setenv), you are most likely using a csh/tcsh shell (even though this is a bit weird since the Mac OS X and Linux operating systems I am aware of normally have bash shell by default).
Could you please conform the followings?
echo $SHELL
Is it csh or tcsh?
ls ~/.tcshrc
Do you have a .tcshrc file instead?
In any event, you are close to get 3DNA up and running. For the current terminal window, you can simply copy and paste the two 'setenv' lines, and then 'find_pair -h' should work.
Please post back how it goes. I am here to getting you through the process.
Xiang-Jun
PS. Presumably, getting 3DNA up and running should be straightforward, with the minimum setting of two environment variables, which itself is automated by the x3dna_setup script. However, I've learned through experimence that for new Linux/Mac OS X users, the command-line setting process could be a hassle. That's one of the reasons I've made DSSR and SNAP completely self-contained to eliminate the setup step.