Of course you also have to have a common (NFS) filesystem.
This means, your data have to be in a certain directory, which must be exported on the server and mounted on the remote node under the same node (with rwx permissions)

test:
pwd
export PWD=`cwd`     (if not already set)
ssh nodeXX "cd $PWD;ls"

Then you need passwordless login, and (as you now have done ?) you must make sure that ssh transmits/accepts your current environment.



To run k-point parallel across different nodes, is it enough to simply
have w2k installed on all the nodes along with pw-less ssh? I have
pw-less ssh working among the nodes, but when I try to run another
kpoint on another node, the shell cannot find the executables:

$ x lapw1 -p
starting parallel lapw1 at Wed Oct 16 10:48:53 PDT 2013
->  starting parallel LAPW1 jobs at Wed Oct 16 10:48:53 PDT 2013
running LAPW1 in parallel mode (using .machines)
2 number_of_parallel_jobs
[1] 4653272
[2] 3605022
ksh: lapw1c:  not found.
ksh: fixerror_lapw:  not found.
ksh: /home/oliver/data/wiendir/benchmark/test_case:  not found.
ksh: lapw1c:  not found.
ksh: fixerror_lapw:  not found.
[2]  - Done                 ( ( $remote $machine[$p]  ...
[1]  + Done                 ( ( $remote $machine[$p]  ...
      stblade01(1) 0.000u 0.000s 0.1 0.00%      0+0k 0+0io 0pf+0w
      stblade02(1) 0.000u 0.000s 0 0.00%      0+0k 0+0io 0pf+0w
test_case.scf1_1: A file or directory in the path name does not exist.
    Summary of lapw1para:
    stblade01     k=1     user=0  wallclock=6
    stblade02     k=1     user=0  wallclock=0
0.1u 0.1s 0:02 8% 0+0k 0+0io 0pf+0w

.machines:
1:stblade01
1:stblade02

Sincerely,

Oliver




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                                      P.Blaha
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Peter BLAHA, Inst.f. Materials Chemistry, TU Vienna, A-1060 Vienna
Phone: +43-1-58801-165300             FAX: +43-1-58801-165982
Email: bl...@theochem.tuwien.ac.at WWW: http://info.tuwien.ac.at/theochem/
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