- WLUG - wlug.mailman3.com

Re: [Wlug] Re: Success, almost, with GNOME

by Jared Greenwald

Though normally I'm a supporter of Gentoo, it can be a little complex to install and keep up to date... You might want to check out edubuntu. (http://www.edubuntu.org/) Its actually specifically designed as a Linux distro for use with kids. -Jared On 12/15/05, Ken Jones <kjones(a)ziplink.net> wrote: > Thanks everyone. I am a KDE fan also. I went to GNOME as an > experiment. I have a memory leak problem with CORE 3 such that every > week or so I need to reboot. (soxview shows SWAP free space slowly > getting smaller and smaller) It turned out that this behavior is > independent of windows manager. > > A question. Whom do I contact at Red Hat to propose that they help the > Fitchburg Public School District migrate to LINUX server based "best > office practices"? > > Ken Jones > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

Dec. 15, 2005

Re: Success, almost, with GNOME

by Ken Jones

Thanks everyone. I am a KDE fan also. I went to GNOME as an experiment. I have a memory leak problem with CORE 3 such that every week or so I need to reboot. (soxview shows SWAP free space slowly getting smaller and smaller) It turned out that this behavior is independent of windows manager. A question. Whom do I contact at Red Hat to propose that they help the Fitchburg Public School District migrate to LINUX server based "best office practices"? Ken Jones

Dec. 15, 2005

RE: [Wlug] Success, almost, with GNOME

by Gary Hanley

On Thu, 15 Dec 2005, Keller, Tim wrote: > Personally, I've moved away from gnome and I've been using xfce and I've > never been happier. I've just finished moving off of Gnome too. I didn't look into xfce but I'm happier with KDE than I was with Gnome. -- Gary

Dec. 15, 2005

RE: [Wlug] Success, almost, with GNOME

by Keller, Tim

Personally, I've moved away from gnome and I've been using xfce and I've never been happier. Tim. -----Original Message----- From: wlug-bounces(a)mail.wlug.org [mailto:wlug-bounces@mail.wlug.org] On Behalf Of Jared Greenwald Sent: Thursday, December 15, 2005 10:54 AM To: Worcester Linux Users Group Subject: Re: [Wlug] Success, almost, with GNOME On 12/15/05, Jeff Moyer <jmoyer(a)redhat.com> wrote: > ==> Regarding Re: [Wlug] Success, almost, with GNOME; Jared Greenwald <greenwaldjared(a)gmail.com> adds: > > greenwaldjared> What about .gnome or .gnome2 directories? There's always > greenwaldjared> restarting the X server with Ctrl+Alt+Backspace (that's > greenwaldjared> backspace, not delete). > > greenwaldjared> Not to start a flame war, but my personal recommendation > greenwaldjared> would be to switch to KDE, but I'm rather biased. KDE 3.5 > greenwaldjared> is really good. :) > > You're not alone in that recommendation. ;) > > http://lists.osdl.org/pipermail/desktop_architects/2005-December/000390. html I saw that the other day, but didn't want to drop the obvious "endorsed by..." tag line... :) _______________________________________________ Wlug mailing list Wlug(a)mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

Dec. 15, 2005

Re: [Wlug] Success, almost, with GNOME

by Jared Greenwald

On 12/15/05, Jeff Moyer <jmoyer(a)redhat.com> wrote: > ==> Regarding Re: [Wlug] Success, almost, with GNOME; Jared Greenwald <greenwaldjared(a)gmail.com> adds: > > greenwaldjared> What about .gnome or .gnome2 directories? There's always > greenwaldjared> restarting the X server with Ctrl+Alt+Backspace (that's > greenwaldjared> backspace, not delete). > > greenwaldjared> Not to start a flame war, but my personal recommendation > greenwaldjared> would be to switch to KDE, but I'm rather biased. KDE 3.5 > greenwaldjared> is really good. :) > > You're not alone in that recommendation. ;) > > http://lists.osdl.org/pipermail/desktop_architects/2005-December/000390.html I saw that the other day, but didn't want to drop the obvious "endorsed by..." tag line... :)

Dec. 15, 2005

Re: [Wlug] Success, almost, with GNOME

by Jeff Moyer

==> Regarding Re: [Wlug] Success, almost, with GNOME; Jared Greenwald <greenwaldjared(a)gmail.com> adds: greenwaldjared> What about .gnome or .gnome2 directories? There's always greenwaldjared> restarting the X server with Ctrl+Alt+Backspace (that's greenwaldjared> backspace, not delete). greenwaldjared> Not to start a flame war, but my personal recommendation greenwaldjared> would be to switch to KDE, but I'm rather biased. KDE 3.5 greenwaldjared> is really good. :) You're not alone in that recommendation. ;) http://lists.osdl.org/pipermail/desktop_architects/2005-December/000390.html -Jeff

Dec. 15, 2005

Re: [Wlug] Success, almost, with GNOME

by Jeff Moyer

==> Regarding [Wlug] Success, almost, with GNOME; Ken Jones <jonesj(a)ziplink.net> adds: jonesj> Per the suggestion of Chuck Anderson I logged in under a new jonesj> account. GNOME desktop worked just as it should. So I removed all jonesj> of the /home/kjones/.gconf directory and logged in again as myself. jonesj> Still it did not work correctly. In particular the right click on jonesj> empty space did not work. jonesj> I did a "diff -r" on the two (now default versions I suppose) jonesj> .gconf directories. They seemed the same save for unique jonesj> identifiers. Where do I look to find the differences? I think you might want to poke around in the .gnome directory. Try the diff between the new user's .gnome and yours. jonesj> One other question. The Applications launcher on GNOME does not jonesj> contain the LOG OUT feature. I know the command "shutdown", but I jonesj> can not find a command to Log Out. Is there one? What is it? It's under the Desktop launcher on my Fedora system. -Jeff

Dec. 15, 2005

Re: [Wlug] Success, almost, with GNOME

by Jared Greenwald

What about .gnome or .gnome2 directories? There's always restarting the X server with Ctrl+Alt+Backspace (that's backspace, not delete). Not to start a flame war, but my personal recommendation would be to switch to KDE, but I'm rather biased. KDE 3.5 is really good. :) On 12/12/05, Ken Jones <jonesj(a)ziplink.net> wrote: > Per the suggestion of Chuck Anderson I logged in under a new account. > GNOME desktop worked just as it should. So I removed all of the > /home/kjones/.gconf directory and logged in again as myself. > > Still it did not work correctly. In particular the right click on empty > space did not work. > > I did a "diff -r" on the two (now default versions I suppose) .gconf > directories. They seemed the same save for unique identifiers. Where > do I look to find the differences? > > One other question. The Applications launcher on GNOME does not contain > the LOG OUT feature. I know the command "shutdown", but I can not find > a command to Log Out. Is there one? What is it? > > Ken Jones > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

Dec. 15, 2005

Links from tonights meeting

by Frank Sweetser

Some of the links that were mentioned in tonights rambling meeting: isc.sans.org Internet Storm Center. A bunch of internet security professionals publishing a diary about major trends in online security. www.thedailywtf.com The Daily "What The F**k?" A programmer oriented blog of "Curious Perversions in Information Technology". -- Frank Sweetser fs at wpi.edu | For every problem, there is a solution that WPI Network Engineer | is simple, elegant, and wrong. - HL Mencken GPG fingerprint = 6174 1257 129E 0D21 D8D4 E8A3 8E39 29E3 E2E8 8CEC

Dec. 15, 2005

Re: [Wlug] getting that cpu to sleep ...

by brad

I looked into rt-linux. It appears that your real time process doesn't actually run as a process but as a kernel module. Unfortunately this would disrupt the flow of my program, but i'll keep this in the back of my head for the next version. Thanks for the suggestion. --Brad On Mon, Dec 12, 2005 at 09:26:51PM -0500, Keith Wright wrote: > > From: brad <maitre(a)ccs.neu.edu> > > > > > The immediate task at hand is that i want to get readings from > > an instrument (a light sensor) at a uniform interval, say every > > 1000 micro seconds. I have been able to achieve this task by > > setting up the loop i described above. However the loop above > > takes 99% of the CPU. I'd like to be able to achieve this > > without pegging the CPU at 99%. Does this make sense? if not i > > can try explaining it again, perhaps with some code. > > > > The kernel i'm running is 2.6.12. (well uname -r reports > > '2.6.12-9-686-smp.' its ubuntu's stock smp kernel.) > > You are doing something that Linux was not designed to do. > But don't despair, you are not the first one. > There is RT-Linux, (Real-Time Linux), which consists of > a real-time scheduler (meaning that it is designed to schedule > tasks with non-negotiable time constraints), which treats the > entire Linux kernel as a background task. > > Assuming your raw processor speed is sufficient (without which > you lose no matter what you do), the RT-Linux scheduler will > run your special task at guaranteed intervals, while any network, > disk I/O, web browsing, etc. that you need to do can use the > Linux system in the cracks between. > > Also the embedded Linux project and uCLinux (microComputer) > Linux might be interesting. Give any of these terms to > Google and get back more than you can read, but here is > a link to get started: > > http://www.linuxdevices.com/articles/AT3694406595.html > > > -- Keith > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

Dec. 14, 2005

Reminder: Meeting Wed 14-dec-05 7:00 PM

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 HI Everybody, Our next meeting is coming up really soon - this Wednesday, Dec 14, at 7:00 PM in the Access Grid room at WPI (lower level of Morgan Hall). I don't have any defined topic for the meeting, so I'm open to any ideas you might have. I have some flyers from Addison-Wesley & Prentice Hall which are for a 40% (yes, forty percent) discount on books purchased online prior to January 10, 2006. They will be available at this meeting. Also, I'll bring the following books for the zero cost raffle: Linux, Debugging and Performance Tuning Author: Steve Best Prentice Hall Apache Derby - Off to the Races Includes Details of IBM Cloudscape Authors: Paul C. Zikopoulos, Dan Scott, George Baklarz IBM Press That's about it - I look forward to seeing you at the meeting! 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 iD8DBQFDnkIzHl0iXDssISsRAiR8AJ9D/L0X/Iak0TLPTt0dnA6Hgg288ACeMYdn zWNMvvBXjO7C9Cq6zSuPNH0= =enyh -----END PGP SIGNATURE-----

Dec. 13, 2005

Re: [Wlug] getting that cpu to sleep ...

by Keith Wright

> From: brad <maitre(a)ccs.neu.edu> > > > The immediate task at hand is that i want to get readings from > an instrument (a light sensor) at a uniform interval, say every > 1000 micro seconds. I have been able to achieve this task by > setting up the loop i described above. However the loop above > takes 99% of the CPU. I'd like to be able to achieve this > without pegging the CPU at 99%. Does this make sense? if not i > can try explaining it again, perhaps with some code. > > The kernel i'm running is 2.6.12. (well uname -r reports > '2.6.12-9-686-smp.' its ubuntu's stock smp kernel.) You are doing something that Linux was not designed to do. But don't despair, you are not the first one. There is RT-Linux, (Real-Time Linux), which consists of a real-time scheduler (meaning that it is designed to schedule tasks with non-negotiable time constraints), which treats the entire Linux kernel as a background task. Assuming your raw processor speed is sufficient (without which you lose no matter what you do), the RT-Linux scheduler will run your special task at guaranteed intervals, while any network, disk I/O, web browsing, etc. that you need to do can use the Linux system in the cracks between. Also the embedded Linux project and uCLinux (microComputer) Linux might be interesting. Give any of these terms to Google and get back more than you can read, but here is a link to get started: http://www.linuxdevices.com/articles/AT3694406595.html -- Keith

Dec. 13, 2005

Re: [Wlug] getting that cpu to sleep ...

by brad

On Mon, Dec 12, 2005 at 06:17:35PM -0500, Jeff Moyer wrote: > ==> Regarding [Wlug] getting that cpu to sleep ...; brad <maitre(a)ccs.neu.edu> adds: > > maitre> greetings, > > maitre> I have a question for those linux programmers out there. i'm > maitre> writing a program on linux (kubuntu to be specific) that requires > maitre> high-precision timing, somewhere on the order of 100 to 1000 micro > maitre> seconds. I get very good timing out of a loop written such that a > maitre> while() loop checks the system clock after every iteration and > maitre> comparing that to the desired wait time, like so (pseudo_code): > maitre> while(time_passed < wait_time) { time_passed = get_time() } ... > > maitre> The problem with this approach is that the process uses 99% of the > maitre> CPU since it just spins the CPU until enough time has expired. My > > The other problem with this is that you can be scheduled if your timeslice > runs out. > ummm, i didn't think about that one. > maitre> question: is there a way on linux (in C) to have the CPU sleep or > maitre> send it a no-op such that it's not just eating up cycles until time > maitre> expires? I have looked at nanosleep and usleep, however they appear > maitre> to only have precision to 10ms which too latent for my needs. > > As Mike pointed out, in more recent kernels you can tune the value of HZ to > get better granularity from select/poll. > Actually Mike's response reminded me of an article i bumped into about nanosleep on dragonflyBSD http://www.dragonflybsd.org/docs/nanosleep/ > What, precisely, are you trying to do and on what kernel? Perhaps with > more information we could provide better guidance. > The immediate task at hand is that i want to get readings from an instrument (a light sensor) at a uniform interval, say every 1000 micro seconds. I have been able to achieve this task by setting up the loop i described above. However the loop above takes 99% of the CPU. I'd like to be able to achieve this without pegging the CPU at 99%. Does this make sense? if not i can try explaining it again, perhaps with some code. The kernel i'm running is 2.6.12. (well uname -r reports '2.6.12-9-686-smp.' its ubuntu's stock smp kernel.) -brad

Dec. 13, 2005

Re: [Wlug] getting that cpu to sleep ...

by Bradley Noyes

On Mon, Dec 12, 2005 at 06:17:35PM -0500, Jeff Moyer wrote: > ==> Regarding [Wlug] getting that cpu to sleep ...; brad <maitre(a)ccs.neu.edu> adds: > > maitre> greetings, > > maitre> I have a question for those linux programmers out there. i'm > maitre> writing a program on linux (kubuntu to be specific) that requires > maitre> high-precision timing, somewhere on the order of 100 to 1000 micro > maitre> seconds. I get very good timing out of a loop written such that a > maitre> while() loop checks the system clock after every iteration and > maitre> comparing that to the desired wait time, like so (pseudo_code): > maitre> while(time_passed < wait_time) { time_passed = get_time() } ... > > maitre> The problem with this approach is that the process uses 99% of the > maitre> CPU since it just spins the CPU until enough time has expired. My > > The other problem with this is that you can be scheduled if your timeslice > runs out. > umm, i didn't think about that one. > maitre> question: is there a way on linux (in C) to have the CPU sleep or > maitre> send it a no-op such that it's not just eating up cycles until time > maitre> expires? I have looked at nanosleep and usleep, however they appear > maitre> to only have precision to 10ms which too latent for my needs. > > As Mike pointed out, in more recent kernels you can tune the value of HZ to > get better granularity from select/poll. > Actually Mike's response reminded me of an article i bumped into about nanosleep on dragonflyBSD http://www.dragonflybsd.org/docs/nanosleep/ > What, precisely, are you trying to do and on what kernel? Perhaps with > more information we could provide better guidance. > The immediate task at hand is that i want to get readings from an instrument (a light sensor) at a uniform interval, say every 1000 micro seconds. I have been able to achieve this task by setting up the loop i described above. However the loop above takes 99% of the CPU. I'd like to be able to achieve this without pegging the CPU at 99%. Does this make sense? if not i can try explaining it again, perhaps with some code. The kernel i'm running is 2.6.12. (well uname -r reports '2.6.12-9-686-smp.' its ubuntu's stock smp kernel.) -brad

Dec. 13, 2005

Re: [Wlug] getting that cpu to sleep ...

by Jeff Moyer

==> Regarding [Wlug] getting that cpu to sleep ...; brad <maitre(a)ccs.neu.edu> adds: maitre> greetings, maitre> I have a question for those linux programmers out there. i'm maitre> writing a program on linux (kubuntu to be specific) that requires maitre> high-precision timing, somewhere on the order of 100 to 1000 micro maitre> seconds. I get very good timing out of a loop written such that a maitre> while() loop checks the system clock after every iteration and maitre> comparing that to the desired wait time, like so (pseudo_code): maitre> while(time_passed < wait_time) { time_passed = get_time() } ... maitre> The problem with this approach is that the process uses 99% of the maitre> CPU since it just spins the CPU until enough time has expired. My The other problem with this is that you can be scheduled if your timeslice runs out. maitre> question: is there a way on linux (in C) to have the CPU sleep or maitre> send it a no-op such that it's not just eating up cycles until time maitre> expires? I have looked at nanosleep and usleep, however they appear maitre> to only have precision to 10ms which too latent for my needs. As Mike pointed out, in more recent kernels you can tune the value of HZ to get better granularity from select/poll. What, precisely, are you trying to do and on what kernel? Perhaps with more information we could provide better guidance. -Jeff

Dec. 12, 2005

Re: [Wlug] getting that cpu to sleep ...

by Mike Frysinger

On Mon, Dec 12, 2005 at 05:48:24PM -0500, brad wrote: > My question: is here a way on linux (in C) to have the CPU sleep or > send it a no-op such that it's not just eating up cycles until time > expires? I have looked at nanosleep and usleep, however they appear > to only have precision to 10ms which too latent for my needs. you cant unless you tweak the kernel HZ settings read this page: http://kerneltrap.org/node/464 -mike

Dec. 12, 2005

getting that cpu to sleep ...

by brad

greetings, I have a question for those linux programmers out there. i'm writing a program on linux (kubuntu to be specific) that requires high-precision timing, somewhere on the order of 100 to 1000 micro seconds. I get very good timing out of a loop written such that a while() loop checks the system clock after every iteration and comparing that to the desired wait time, like so (pseudo_code): while(time_passed < wait_time) { time_passed = get_time() } ... The problem with this approach is that the process uses 99% of the CPU since it just spins the CPU until enough time has expired. My question: is there a way on linux (in C) to have the CPU sleep or send it a no-op such that it's not just eating up cycles until time expires? I have looked at nanosleep and usleep, however they appear to only have precision to 10ms which too latent for my needs. Thanks, --Brad

Dec. 12, 2005

Success, almost, with GNOME

by Ken Jones

Per the suggestion of Chuck Anderson I logged in under a new account. GNOME desktop worked just as it should. So I removed all of the /home/kjones/.gconf directory and logged in again as myself. Still it did not work correctly. In particular the right click on empty space did not work. I did a "diff -r" on the two (now default versions I suppose) .gconf directories. They seemed the same save for unique identifiers. Where do I look to find the differences? One other question. The Applications launcher on GNOME does not contain the LOG OUT feature. I know the command "shutdown", but I can not find a command to Log Out. Is there one? What is it? Ken Jones

Dec. 12, 2005

Re: [Wlug] Problem with gnome, Fedora core 3

by Chuck Anderson

On Sat, Dec 10, 2005 at 03:58:05PM -0500, Ken Jones wrote: > Any ideas what controls this behavior and ow I can fix it? On a > different machine I have a Core4 system running GNOME perfectly. Try creating a new account and logging in to that one to see if the problem exists there. If not, then it is definately something in your user account, such as your gconf settings.

Dec. 10, 2005

Problem with gnome, Fedora core 3

by Ken Jones

Gentlemen and ladies, My Fedora Core 3 - which has been yum'd up to date - behaves strangely when using GNOME as the windows manager. The right click on blank desktop space does not work. The right click on a panel to make a new panel does not work. The result is that I can not set up any launching icons on my desktop. There is no unused space on my one (bottom) panel. The panel-disappear icon is missing. Any ideas what controls this behavior and ow I can fix it? On a different machine I have a Core4 system running GNOME perfectly. Ken Jones

Dec. 10, 2005

Wanted: used laptop power supply

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 HI gang, I'm looking for a used (functioning) laptop power supply. I won't be using it for a laptop. Input: 120VAC 60Hz (standard wall socket) Output: anywhere from 12 VDC - 48 VDC at about 2 amps I need about 24 watts, so the current goes up as V goes down 48 VDC @ 0.5 A, 24 VDC @ 1.0 A, 12 VDC @ 2.0 A, etc the barrel connector will look like this neg ---C. ---pos that pic won't look right, but it is neg on outside pos on the inside Please send email if you have one, and we can negotiate a price, trade, or whatever you'd like. Ideally, you could bring it to the upcoming WLUG meeting on Wednesday, Dec 14th. 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 iD8DBQFDmm/vHl0iXDssISsRAkEPAJ9FapCV+aOZmtS1wUT2VJ4/C14fCQCeI//x 9H6CbNJklxMzQbepGvSBpa0= =1Gi+ -----END PGP SIGNATURE-----

Dec. 10, 2005

Re: [Wlug] Grub problems after imaging drive

by Brett Russ

On 12/7/05, Dick Goodman <wlug(a)goodman1.net> wrote: > root (hd0,0) > setup (hd0) > quit > > The messages after setup did not look like error messages. The behavior is I need to see those messages. > How do I resolve this? What additional information do you need? The messages above and the output of the grub "geometry (hd0)" command, assuming everything is on the first HDD in the system. Also let us know the intended mount point for each of those partitions. Andy is correct in that the best way to figure this out is to work with the grub command line and walk through the steps it would take trying to boot your system. And Eric is correct in that the grub config file would also be handy. Since the disks are partitioned the same my guess is that the problem lies in the grub stage image installation. I believe some filesystems can get away without a stage1_5 (ext2 being one example, likely used on your RH box) and since you didn't supply an explicit image device to the setup command it's possible that the install wasn't able to find them on the root (hd0,0) that you specified. > Is there a better way to clone Linux drive -> Linux drive? Yes, boot from a Linux CD (like the knoppix that you mentioned) and `dd if=/dev/<good> of=/dev/<blank>` <good> might be hda for example. Obviously blank needs to be as big or bigger than good or you risk an incomplete copy and therefore chopped filesystems. BR

Dec. 9, 2005

Re: [Wlug] Grub problems after imaging drive

by Eric Martin

dick, can you post you /boot/grub/grub.conf (or /boot/grub/menu.lst). menu.lst is the old way, it's probably a symlink now... On 12/7/05, Andy Stewart <andystewart(a)comcast.net> wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Dick Goodman wrote: > > I recently configured a RedHat 9 system with OpenVPN . The original > > configuration was done on an old junk box. This is a single boot w/grub > > system > > > > As of last week I knew nothing about grub; I now know marginally more. > > > > As it was working successfully, it was decided to build a new box for > it. > > The hard drive was imaged with Ghost Corporate 8.x and restored onto the > > new drive. There are some known issues with 8.x and grub > > > > The grub screen comes up on booting the new box, but when selecting the > > (one) entry for RH9, after a short pause it comes back to the grub > > screen. I read the grub manual, and from the grub screen did c-command, > > then > > > > root (hd0,0) > > setup (hd0) > > quit > > > > The messages after setup did not look like error messages. The behavior > > is the same, although I see a message about stage 1.5 flicker by. > > I figured out how to look at the hard drive with Knoppix 3.8.2 Live CD > > and the partitions and contents look "ok", so it appears to just be a > > boot issue. > > > > How do I resolve this? What additional information do you need? Is there > > a better way to clone Linux drive -> Linux drive? > > > > Dick > > _______________________________________________ > > Wlug mailing list > > Wlug(a)mail.wlug.org > > http://mail.wlug.org/mailman/listinfo/wlug > > > > Here's what I use for boot commands in GRUB on my system. Its SuSE, but > I don't think it should make a difference. > > root (hd0,0)/vmlinuz <boot parameters> > initrd (hd0,0)/initrd > > - From a GRUB command line, make sure (by using the TAB key) that (hd0,0) > is a legitimate partition, and that it can find /vmlinuz (or whatever > kernel image you are using). If you need initrd, you can use the same > trick with the TAB key to get a poor man's directory listing. > > After you enter those lines, or edit the existing lines to make them > look as above, boot it and you should at least get the kernel to start. > You may need to specify "root=/dev/xxx" as one of the boot parameters > on the "root" command. If you get a panic when it tries to mount root, > it is either because you didn't specify "root=/dev/xxx", or because the > code for the root device isn't present in the kernel (for example, a > SCSI driver or a reiserfs module, as appropriate). I hope root isn't > part of LVM...that's a can of worms you should avoid, but I digress. > > I hope this helps, > > 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 > > iD8DBQFDlnkCHl0iXDssISsRAuiaAJ0ZhX3Il4sFM2Yt2cCG1IQBZMy11wCfZIcn > bPoThROtkjrTtXGgaHq2Vms= > =J3lU > -----END PGP SIGNATURE----- > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

Dec. 8, 2005

Re: [Wlug] ftp in bash script

by John Stoffel

Gregory> I'm writing a bash script to download a logfile from a site, Gregory> archive it, then upload the archive to the site. I want the Gregory> script to stop if the file doesn't download correctly, and I Gregory> think I've accomplished this. (i.e. it works right when I set Gregory> it up to download a non-existent file.) Can't you run a script on the remote site? That would make the problem trivial. Also, you might want to check and see if your site (if you don't have full control) offers the ability to automatically rotate logs for you, which would make things much simpler all around. Gregory> Question: will ftp always return an error if the file is Gregory> downloaded incorrectly or incompletely? Nope, I don't think it will. You might try to use wget instead. Also, I'd try to download the file, then re-download it and see if the files are the same. If not, then you have a problem. It's a question of whether you're willing to lose logging information from your ftpd server. If you can lose some data. then what you're proposing should work. Gregory> This is important, because the last part of the script will Gregory> replace the file on the ftp server with a blank file of the Gregory> same name. I don't want to wipe out the original logfile if I Gregory> don't have it all. It's hard to do this, because in the time between you download the file, it might log a download (such as the FTP getting the log file itself!) and you'll miss details. Again, look for a solution where you can get the remote site to do the log rotation for you, since with the help of the ftp server, you can make sure you get a clean and consistent log file. Gregory> (secondary question: Is there a way to pass the "delete" Gregory> argument without using the interactive shell?) Not sure. You shouldn't have to anyway, just upload a zero length file over the log file and you'r eall set. Gregory> Here's what the first section of the script looks like. Third Gregory> question: If I set this up to run as a cron job, what happens Gregory> to my echo messages? Will they appear in /var/log/messages? You should look into using 'expect' to do all this work for you, it's the tool to use to automate a manual process. John

Dec. 7, 2005

ftp in bash script

by Gregory Avedissian

I'm writing a bash script to download a logfile from a site, archive it, then upload the archive to the site. I want the script to stop if the file doesn't download correctly, and I think I've accomplished this. (i.e. it works right when I set it up to download a non-existent file.) Question: will ftp always return an error if the file is downloaded incorrectly or incompletely? This is important, because the last part of the script will replace the file on the ftp server with a blank file of the same name. I don't want to wipe out the original logfile if I don't have it all. (secondary question: Is there a way to pass the "delete" argument without using the interactive shell?) Here's what the first section of the script looks like. Third question: If I set this up to run as a cron job, what happens to my echo messages? Will they appear in /var/log/messages? #download logfile if ftp ftp://user:password@ftp.site.net/logfile.log; then echo echo "File has been downloaded" echo else echo "Download failed" exit fi Thanks, Greg

Dec. 7, 2005