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HI:<br> I install MPICH2 under my ubuntu OS.And I have three computers.<br><br><br>In computer one (node0), /etc/hosts file is :<br>127.0.0.1 localhost.localdomain localhost<br>::1 wcj localhost6.localdomain6 localhost6<br>127.0.1.1 ubuntu.ubuntu-domain wcj<br><br># The following lines are desirable for IPv6 capable hosts<br>#::1 localhost ip6-localhost ip6-loopback<br>fe00::0 ip6-localnet<br>ff00::0 ip6-mcastprefix<br>ff02::1 ip6-allnodes<br>ff02::2 ip6-allrouters<br>ff02::3 ip6-allhosts<br><br>192.168.1.100 node0 server<br>192.168.1.122 node1 qym<br>192.168.1.115 node2 npp<br><br>and I use mpdcheck to test whether node0 is ok.Output ,after mpdcheck is<br>that :<br>*** the fq hostname seems to be localhost<br><br> **********<br> Your fully qualified a
nd unqualified names do not resolve to<br> the same IP. This likely means that your DNS domain name is not<br> set correctly. This might be fixed by adding a line similar<br> to the following to your /etc/hosts:<br> $ipaddr $fqhn $uqdn<br> **********<br><br><br>In computer two (node1),/etc/hosts file is :<br>#::1 ubuntu localhost6.localdomain6 localhost6<br>127.0.1.1 ubuntu.ubuntu-domain ubuntu<br>127.0.0.1 localhost.localdomain localhost<br> <br># The following lines are desirable for IPv6 capable hosts<br>#::1 localhost ip6-localhost ip6-loopback<br>fe00::0 ip6-localnet<br>ff00::0 ip6-mcastprefix<br>ff02::1 ip6-allnodes<br>ff02::2 ip6-allrouter
s<br>ff02::3 ip6-allhosts<br> <br>192.168.1.100 wcj node0<br>And ,after mpdcheck ,output is :<br>*** first ipaddr for this host (via ubuntu) is: 127.0.1.1<br><br>Computer three (node2) has the same problem as node1.<br><br>Meanwhile ,after mpdboot -n 3 -f mpd.hosts,output is :<br>/mirror/mpich2/bin/mpdboot:56: DeprecationWarning: The popen2 module is<br>deprecated. Use the subprocess module.<br> from popen2 import Popen4, Popen3, popen2<br>/mirror/mpich2/bin/mpdlib.py:15: DeprecationWarning: the md5 module is<br>deprecated; use hashlib instead<br> from md5 import new as md5new<br>mpdboot_wcj (handle_mpd_output 393): failed to handshake with mpd on<br>node2; recvd output={}<br><br> Those are the three problems which I meet,and <br>I don't know how to correct the problems.<br><br>Thank you !<br><br> Changjiang wu<br>2011-8-20<br><br></div>