&gt;Is hboot a binary executable or a script? If it's a script, is it<br>&gt;trying to invoke the mkdir command and failing because mkdir(1) does<br>&gt;not exist on the back-end node?<br><br>what I installed is the LAM-MPI (version 7.1.4), donwloaded from its website. The hboot is binary executable. I can make sure that the back-end nodes are installed basic linux commands such as mkdir, rm, etc.<br><br><br>&gt;Does /tmp exist and is it writable? What does running "hboot -d"<br>&gt;manually on the back-end node (interactively or via ssh) result in?<br><br><br>/tmp exists in all the nodes. The outputted information of "hboot -d" directly run in back-end nodes is as follows:<br><br>anching@anqin-desktop:~$ hboot -d<br>hboot: booting...<br>hboot: fork /usr/local/bin/lamd<br>hboot: attempting to execute<br>[1]&nbsp; 19457 lamd -d<br>anching@anqin-desktop:~$ -----------------------------------------------------------------------------<br>The booted program is missing at least
 one of the -H, -P, or -n<br>command line arguments.&nbsp; These arguments are required to tell the<br>booted program how to contact the booting agent.<br><br>Cannot continue.&nbsp; Sorry.<br>-----------------------------------------------------------------------------<br><br>I don't know how to do "running 'hboot -d' manually on the back-end node (interactively or via ssh)". The screen dump of directly running in back-end is mentioned above. And then, I logined the back-end node by ssh,<br><br>1. login back-end node by ssh:<br>$ myssh&nbsp; 192.168.8.55<br>2. After login successfully, run the "hboot -d" in shell,<br>$ hboot -d<br><br>$hboot -d<br>hboot: booting...<br>hboot: fork /usr/local/bin/lamd<br>hboot: attempting to execute<br>[1]&nbsp; 20291 lamd -d<br>anching@anqin-desktop:~$ lamd kernel: problem with bind (/tmp/lam-unknown@anqin-desktop/lam-kernel-socket): Address already in use<br><br><br>&gt;Do you get a lamd running?<br><br>Hmm.. .&nbsp; I don't know. I run the
 mpi environment according to the user.pdf released with lam-7.1.4.tar.gz. Does the lamd have to be run before "lamboot"?<br>All the problems I met are in the first stage when I run the lamboot .<br><br>could anybody give me some advices?<br><br>Thanks in advance,<br>Ann<br><p>&#32;


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