On Saturday 21 July 2012 11:53:33 Kent A. Reed did opine: > Gene: > > I'm not going to comment your recent emails because 1) I don't want to > take the time to understand the information scattered through them and > 2) the result would be unreadable:-) > > Assuming all hosts have the appropriate packages installed, some > thoughts are: > > 1) maybe this is all working anyhow. Do you understand the autofs "way" > is not actually to mount a remote directory until such time as a user > tries to use it and that remote directories are unmounted after a period > of unuse? Simply ls'ing the mount point isn't sufficient. It would show > nil just as you report. > I am aware of that. Now here it gets odd. I can cd to /net/lathe, or /net/shop (I should change its name to mill, but it was first) and then see the home dir exported. And I haven't changed anything since the last time mc would not do the cd. And just now, mc can cd to /net/shop/home or /net/lathe/home, but is getting no perms errors from any attempt to cd into the home/gene tree. Humm, a what the F moment, it says here that root:root owns /net/lathe/home/gene! But if I ssh -Y into lathe, an ls -l says /home/gene is indeed owned by gene:gene.
Do I have an export rule boogered? > 2) don't go any farther until you can reliably ssh between any two hosts > on your network using their symbolic host names. If there are three > hosts, you have 6 tests (ssh from a to b and c, from b to c and a, and > from c to a). If ssh doesn't succeed, neither will the nfs executables. ssh -Y logins will let me use vim, and I can run linuxcnc over the link, but gedit 'can't open display'. As I'm using the neauvou display driver here, I think that could be related, the last time I was running the nvidia drivers it worked. > > 3) start simple and add complexity. Forget about autofs for a moment. On > each host, you should be able to start an nfs server exporting a single > directory and then mount that directory manually on each client of that > server. It took me just a few minutes to get this far with three new > virtual Ubuntu hosts---one installed from the LinuxCNC LiveCD---running > on my main machine. Again, there would be 6 tests if you want to be > exhaustive about it. By the way, assuming your exports file permits it, > you can mount on a particular host a directory exported by that same > host. This enables doing some elementary tests without running from > console to console. > > 4) now introduce autofs, one host at a time, and test that you can > access directories exported from elsewhere, keeping 1) in mind. I have > other things to do, but I'll try to get to this tonight with my virtual > testbed. > > 5) the /var/log directory is loaded with log files. In addition to > the/var/log/kern.log file already mentioned, you can look at > /var/log/syslog. > > 6) nfs is a heterogeneous constellation of executables and configuration > files which grew like kudzu over the years as different vendors got on > the Sun Microsystems bandwagon. The Linux versions of these came from > various sources as well. Most of the executables allow a debug option > (-d) of some sort, but you have to be creative to figure out how to > invoke it since some of the executables run as daemons. Remember that > any executable intended to be a daemon can be run stand-alone for > testing purposes. > > I do not claim to be an nfs guru. Indeed, I'm not even a big fan of nfs. > Despite its irritations, however, it can serve (pun intended) us well. > I've been gone for a while but I assume NIST still has a patchwork quilt > of hundreds of hosts from many vendors running as clients and servers > across the 600-acre Gaithersburg campus and between Gaithersburg MD and > Boulder Colorado. Some folks ran tightly coupled to it, max'ing their > use of its capabilities to manage every aspect including the boot > process, the hosts and passwd files, yada yada yada; some, like me, used > it only to access shared application programs and their license-key > pools. Of course we had a number of NFS administrators who had to be put > in their place from time to time when they started thinking they talked > directly to God. Chuckle, I've dealt with the type. Peter Principle at work. :) > Just my 2 cents worth. Potentially worth more, thanks Kent. > > Regards, > Kent > > > ------------------------------------------------------------------------ > ------ Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. > Discussions will include endpoint security, mobile security and the > latest in malware threats. > http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! Double! ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
