- WLUG - wlug.mailman3.com

VPN

by Aramico

Dear Friends, Can you all please suggest me kind of VPN application based on Linux (especially RedHat 7.3 compatibility) ? Thanks, Aramico

June 15, 2005

Need Homes: 2U+,custom cases/psupp/fans

by Doug Mildram

Yet another Westboro,MA giveaway: (Anyone teaching EE or Hobbies909?) Free and basically new: empty/nonstandard cases w/powersupp+fans. A dead project has left homeless ~15 cases, 19" wide, 24" deep, (19" wide == standard 18.5" distance between frontpanel mounting holes) 4.5" high == including .5" high rubber feet. (2U == 3.5", these are taller), semi-empty inside (a 13"x14"x3.5" area inside plus a 6"x8"x3.5" along psupply) 19" rackmountable , BUT, ***** NOT ***** set up for PC-based motherboard: does NOT include disk/floppy/usb brackets or any of THAT pc-ready stuff. http://webpages.charter.net/mquinty/case_top.JPG Each case has a 400W standard 12v/5v power supply, and (4) 3.5" fans already mounted (side exhaust) inside; a removable suitcase-strap-panel on the front as shown; (see picture case_front.JPG URL below..but it hides the switches below) also on front panel: 1 power switch; 2 LEDs, "Fan Fail" and "Power". http://webpages.charter.net/mquinty/case_front.JPG Even MORE Gory detail: Each case has a custom (now useless) NONstandard screw-post arrangement which you'd need to re-do (re-drill new holes as needed, may need shorter posts). So it's good if you have something REALLY CUSTOM you want mounted+powered. If you ask for just the power supplies, you're missing my mantra: these babies (CASES) need an inventive home or homes. -- doug mildram

June 14, 2005

Reminder: WLUG Meeting, Wed June 15, 7:00 PM

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 HI everybody, This is a reminder about the WLUG meeting to be held on Wednesday, June 15, 2005 at 7:00 PM in the Access Grid room on the WPI Campus in Worcester, MA USA. This meeting is open to anyone who is interested in Linux. Tim Keller will be our guest speaker, and he'll be talking about Logical Volume Management (LVM). More details can be found on the WLUG home page. I will have two books for the no cost raffle: Succeeding with Open Source by Bernard Golden Published by Addison-Wesley 2005 PHP5 Power Programming by Gutmans, Bakken, and Rethans Published by Prentice Hall 2005 The raffle winner is requested to write a review of the book and to post it somewhere on the Internet, and to copy the publisher. We had discussed the possibility of a summer barbecue in lieu of the July meeting. I think someone said we could have the party at their place, but I can't remember who said that. If this person was serious, please contact me via email and we can work out the particulars. It'll be a nice way to celebrate WLUG's 8th anniversary (we started July 1997)! After the meeting, we'll go out for pizza/soda at the Tech Pizza restaurant on Highland Street. Its a small place, but the 8-10 of us that go seem to be having a good time, and we've never had to wait for a table. :-) It may be hot in there this time of year...we'll have to scope it out. See you on Wednesday! Andy - -- Andy Stewart, Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCrj4THl0iXDssISsRAhttAJsG8rEhMLYrtzolhdFWpnwTBYFWFQCgh/xB RA6vaXZaqh7HUbT8Et7x1zM= =he7f -----END PGP SIGNATURE-----

June 14, 2005

Re: [Wlug] HOWTO debug hard lockups

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 John Stoffel wrote: > > Andy> So far, so good, but I only installed 2.6.11.11: > Andy> 7:49pm up 2 days 20:40, 7 users, load average: 2.04, 2.08, 2.08 > > Andy> Linux amdtux 2.6.11.11 #1 SMP Tue Jun 7 21:12:53 EDT 2005 x86_64 x86_64 > Andy> x86_64 GNU/Linux > > I assume you did a 'make oldconfig' to keep your settings a close as > possible to the previous kernel? I'm wondering if there's some sort > of difference in settings that might have made a difference here. Well, what I actually did is this: booted previous kernel (2.6.8.something_from_suse) cd /usr/src/linux-2.6.11.11 zcat /proc/config.gz > .config make xconfig (make no changes, save it back out) make ....... > > In any case, good luck, and great to hear it's working well for you. Thanks - I'm keeping my fingers crossed! > > My old dual cpu PIII Xeon 550mhz is still chugging along well, but I'm > starting to think I want a silent NFS/mysql/daemon server with a bunch > of disk and a tape drive to sit off in a quiet corner somewhere to do > backups, serve files, etc. And be stable and quiet. Then my main box > could become a more general play system again. My dual PIII 450MHz system is now a MythTV backend, and it seems quite happy in that role. :-) Later, Andy - -- Andy Stewart, Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCq6mgHl0iXDssISsRAu6TAJ9EsNQVMwogKOSmUB1weKE2XU83pgCfZGSI 9n5fJ5mD4VwfZD2LxGcLg1E= =6fO7 -----END PGP SIGNATURE-----

June 12, 2005

Re: [Wlug] HOWTO debug hard lockups

by John Stoffel

Andy> So far, so good, but I only installed 2.6.11.11: Andy> 7:49pm up 2 days 20:40, 7 users, load average: 2.04, 2.08, 2.08 Andy> Linux amdtux 2.6.11.11 #1 SMP Tue Jun 7 21:12:53 EDT 2005 x86_64 x86_64 Andy> x86_64 GNU/Linux I assume you did a 'make oldconfig' to keep your settings a close as possible to the previous kernel? I'm wondering if there's some sort of difference in settings that might have made a difference here. In any case, good luck, and great to hear it's working well for you. My old dual cpu PIII Xeon 550mhz is still chugging along well, but I'm starting to think I want a silent NFS/mysql/daemon server with a bunch of disk and a tape drive to sit off in a quiet corner somewhere to do backups, serve files, etc. And be stable and quiet. Then my main box could become a more general play system again. John

June 12, 2005

Re: [Wlug] HOWTO debug hard lockups

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 So far, so good, but I only installed 2.6.11.11: 7:49pm up 2 days 20:40, 7 users, load average: 2.04, 2.08, 2.08 Linux amdtux 2.6.11.11 #1 SMP Tue Jun 7 21:12:53 EDT 2005 x86_64 x86_64 x86_64 GNU/Linux - -- Andy Stewart, Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCqiduHl0iXDssISsRApBGAJ4w8HXNq60qb/6BMON3uz4aoywjRwCdHWrC xVYbnucZfFPBUFt3MWZhXNc= =z/Mt -----END PGP SIGNATURE-----

June 10, 2005

RE: [Wlug] HOWTO debug hard lockups

by Keller, Tim

Andy, Your lockup's sound like an SMP issue. I'd try booting a non SMP kernel and then seeing if you can duplicate the lockup... I say this because I was getting practically the same behavior with a duel Xeon machine running FC3. The machine would just up and die in the same way your machine is. Just my $.02. Tim. -----Original Message----- From: wlug-bounces(a)mail.wlug.org [mailto:wlug-bounces@mail.wlug.org] On Behalf Of Andy Stewart Sent: Wednesday, June 08, 2005 7:15 PM To: jmoyer(a)redhat.com; Worcester Linux Users Group Subject: Re: [Wlug] HOWTO debug hard lockups -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jeff Moyer wrote: > ==> Regarding Re: [Wlug] HOWTO debug hard lockups; Andy Stewart <andystewart(a)comcast.net> adds: > > andystewart> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > > andystewart> Jeff Moyer wrote: >>>==> Regarding [Wlug] HOWTO debug hard lockups; Andy Stewart >>><andystewart(a)comcast.net> adds: >>> > andystewart> HI gang, > andystewart> My dual Opteron machine is not happy. I cannot get more than > andystewart> 7 straight days of uptime without getting a hard lock, > andystewart> requiring a reboot. (My definition of hard lock is: machine > andystewart> responds neither to keyboard input, mouse input, nor network > andystewart> pings). > andystewart> I can stimulate hard locks by running OpenOffice 1.1.3 (I had > andystewart> 3 tonight, and 3-4 on a previous occasion while running > andystewart> OpenOffice). It makes no sense to me that an application run > andystewart> as a normal user could lockup a machine. > andystewart> I've tried setting "nmi_watchdog=1" to see if I could get an > andystewart> "oops" when it hard locks - no dice. Do you know any other > andystewart> tricks I could try to see if it is the kernel which is locking > andystewart> up? I'm running SuSE's version of 2.6.8. >>>Did you verify that NMIs are being delivered? After boot, cat >>>/proc/interrupts and make sure the NMI line is non-zero. Also note >>>that, at least with upstream and Red Hat kernels, the nmi_watchdog >>>defaults to 1 for Opterons (i.e. you shouldn't need to manually set it). > > andystewart> HI Jeff, > > andystewart> Well, this is weird, I'm seeing a ZERO count for NMIs, so that > andystewart> makes me think they are NOT being delivered. How would I go > andystewart> about solving *that* little problem? I did a "cat > > Well, you can try booting with nmi_watchdog=2. This will try to use the > local APIC to deliver nmi's, but I haven't actually seen a dual processor > system that required this (all of them I've seen work with nmi_watchdog=1). > It is worth a try, however. With nmi_watchdog=1, I see the following output from "dmesg | grep -i nmi" with the 2.6.11.11 kernel I very recently installed: Bootdata ok (command line is root=/dev/sda3 vga=0x31a selinux=0 console=tty0 resume=/dev/sda2 desktop elevator=as nmi_watchdog=1 splash=verbose) ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1]) ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1]) Kernel command line: root=/dev/sda3 vga=0x31a selinux=0 console=tty0 resume=/dev/sda2 desktop elevator=as nmi_watchdog=1 splash=verbose activating NMI Watchdog ... done. testing NMI watchdog ... CPU#1: NMI appears to be stuck (0)! I'll try nmi_watchdog=2 shortly. Thanks, Andy - -- Andy Stewart, Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCp3v8Hl0iXDssISsRAoDJAJ0TonNTSEAd+4W0GRPwTW/UoGFssACdEEq9 8IgEFJ7VAL/FVeyPXrEapHg= =jcjE -----END PGP SIGNATURE----- _______________________________________________ Wlug mailing list Wlug(a)mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

June 9, 2005

Re: [Wlug] HOWTO debug hard lockups

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jeff Moyer wrote: > ==> Regarding Re: [Wlug] HOWTO debug hard lockups; Andy Stewart <andystewart(a)comcast.net> adds: > > andystewart> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > > andystewart> Jeff Moyer wrote: >>>==> Regarding [Wlug] HOWTO debug hard lockups; Andy Stewart >>><andystewart(a)comcast.net> adds: >>> > andystewart> HI gang, > andystewart> My dual Opteron machine is not happy. I cannot get more than > andystewart> 7 straight days of uptime without getting a hard lock, > andystewart> requiring a reboot. (My definition of hard lock is: machine > andystewart> responds neither to keyboard input, mouse input, nor network > andystewart> pings). > andystewart> I can stimulate hard locks by running OpenOffice 1.1.3 (I had > andystewart> 3 tonight, and 3-4 on a previous occasion while running > andystewart> OpenOffice). It makes no sense to me that an application run > andystewart> as a normal user could lockup a machine. > andystewart> I've tried setting "nmi_watchdog=1" to see if I could get an > andystewart> "oops" when it hard locks - no dice. Do you know any other > andystewart> tricks I could try to see if it is the kernel which is locking > andystewart> up? I'm running SuSE's version of 2.6.8. >>>Did you verify that NMIs are being delivered? After boot, cat >>>/proc/interrupts and make sure the NMI line is non-zero. Also note >>>that, at least with upstream and Red Hat kernels, the nmi_watchdog >>>defaults to 1 for Opterons (i.e. you shouldn't need to manually set it). > > andystewart> HI Jeff, > > andystewart> Well, this is weird, I'm seeing a ZERO count for NMIs, so that > andystewart> makes me think they are NOT being delivered. How would I go > andystewart> about solving *that* little problem? I did a "cat > > Well, you can try booting with nmi_watchdog=2. This will try to use the > local APIC to deliver nmi's, but I haven't actually seen a dual processor > system that required this (all of them I've seen work with nmi_watchdog=1). > It is worth a try, however. With nmi_watchdog=1, I see the following output from "dmesg | grep -i nmi" with the 2.6.11.11 kernel I very recently installed: Bootdata ok (command line is root=/dev/sda3 vga=0x31a selinux=0 console=tty0 resume=/dev/sda2 desktop elevator=as nmi_watchdog=1 splash=verbose) ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1]) ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1]) Kernel command line: root=/dev/sda3 vga=0x31a selinux=0 console=tty0 resume=/dev/sda2 desktop elevator=as nmi_watchdog=1 splash=verbose activating NMI Watchdog ... done. testing NMI watchdog ... CPU#1: NMI appears to be stuck (0)! I'll try nmi_watchdog=2 shortly. Thanks, Andy - -- Andy Stewart, Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCp3v8Hl0iXDssISsRAoDJAJ0TonNTSEAd+4W0GRPwTW/UoGFssACdEEq9 8IgEFJ7VAL/FVeyPXrEapHg= =jcjE -----END PGP SIGNATURE-----

June 8, 2005

Re: [Wlug] HOWTO debug hard lockups

by Michael Long

Andy Stewart wrote: >-----BEGIN PGP SIGNED MESSAGE----- >Hash: SHA1 > >John Stoffel wrote: > > >>Andy, >> >>The best thing to do here is to run a serial console to another one of >>your systems and use THAT to try and catch the issue. You can then do >>a SysRq from the remote serial console and/or catch any error >>messages. >> >>Also, are there any messages in dmesg or /var/log/messages? How does >>the bootup look? Any warnings? Also, please try 2.6.12-rc6 and see >>if the problem repeats. >> >>John >> >> > >HI John, > >I'm going to give the serial console a try - I may have a cable lying >around. > >I upgraded to the 2.6.11.11 kernel which did have several fixes for K8. > We'll see how that goes. > >Thanks for the ideas! > >Andy > >- -- >Andy Stewart, Founder >Worcester Linux Users' Group >Worcester, MA, USA >http://www.wlug.org > >-----BEGIN PGP SIGNATURE----- >Version: GnuPG v1.2.5 (GNU/Linux) >Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org > >iD8DBQFCp2yhHl0iXDssISsRAqxcAJwLntOh9GpNmefW/+JdwbAUMRJKBACfbV1P >s2eqMUnY6rjZaIfI6MzZLqQ= >=aLfl >-----END PGP SIGNATURE----- >_______________________________________________ >Wlug mailing list >Wlug(a)mail.wlug.org >http://mail.wlug.org/mailman/listinfo/wlug > > Andy, If that doesn't help try using the system without the kvm and see if you get the same behavior. I have seen odd things in the past when using a faulty kvm switch. Mike

June 8, 2005

Re: [Wlug] HOWTO debug hard lockups

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 John Stoffel wrote: > Andy, > > The best thing to do here is to run a serial console to another one of > your systems and use THAT to try and catch the issue. You can then do > a SysRq from the remote serial console and/or catch any error > messages. > > Also, are there any messages in dmesg or /var/log/messages? How does > the bootup look? Any warnings? Also, please try 2.6.12-rc6 and see > if the problem repeats. > > John HI John, I'm going to give the serial console a try - I may have a cable lying around. I upgraded to the 2.6.11.11 kernel which did have several fixes for K8. We'll see how that goes. Thanks for the ideas! Andy - -- Andy Stewart, Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCp2yhHl0iXDssISsRAqxcAJwLntOh9GpNmefW/+JdwbAUMRJKBACfbV1P s2eqMUnY6rjZaIfI6MzZLqQ= =aLfl -----END PGP SIGNATURE-----

June 8, 2005