December 2005 - WLUG - wlug.mailman3.com

FC2 and FC3 to FC4 ... ?

by Theo Van Dinter

Hey folks, I have an FC2 and FC3 machine which I want to get upgraded to FC4. In the past, I used to spend an hour or two doing this type of thing manually which was a pain but generally got the job done ... This time around I was thinking of either using yum or burning some CDs and doing the upgrade method (which the Fedora guys recommended to me). Anyone have suggestions about what method works best? Any gotchas I should worry about, etc? Thanks in advance! :) -- Randomly Generated Tagline: "If you lend someone $20, and never see that person again, it was probably worth it." - Zen Musings

Dec. 29, 2005

Re: [Wlug] Busybox / mips / embedded Linux question

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > > I've been scouring the net and cannot find an answer. I must be doing > something wrong, but I know not what. Does anybody have any helpful hints? Other notes: With respect to file descriptors, I noticed on my x86_64 system that /dev/fd is a symlink to /proc/self/fd, but not so on the MIPS box. I added that link to no avail. It seemed relevant, but perhaps not. /proc is enabled on the MIPS box. I also checked via ulimit to insure that I wasn't somehow limited in the number of open file descriptors. No problems there as far as I can tell. I think that's it for now. 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 iD8DBQFDtGfoHl0iXDssISsRAlMbAJ4odnJkq+6nmuUmwqnobUFHCeKnCQCfW0lo Ih8arrn+mj7WxdbUpmCHmqo= =R4qz -----END PGP SIGNATURE-----

Dec. 29, 2005

Busybox / mips / embedded Linux question

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 HI gang, I am playing with a single board computer (SBC) in an attempt to make a diskless, fanless, silent firewall. Specifically, its the RouterBoard 532 (http://www.routerboard.com) The processor is MIPS based (4Kc). I've been using the buildroot software (nice!) which made creating the cross compiler enviroment considerably easier than my previous (failed) attempts at doing this by hand. My cross compiler environment is now working quite nicely. I have created an environment where I have loaded software onto a compact flash card and booted Linux 2.4.30 on this box. I have logged in and gotten the box talking on the net. All 3 ethernet ports function, as well as ssh and dhcp. Sweet! My next step is to take the SuSE firewall scripts (they are GPL) and run them on this box. However, I'm hitting a wall that I don't think I should be hitting. Within busybox, command substitution and pipes don't work on this MIPS box (but they do work on my x86_64). command substitution example: echo `cat /etc/hostname` pipes: ls -l | grep foo With neither of these working, real scripts don't work too well. :-( I've traced the source code (gotta love free software!) and the code fails whenever it calls the function dup2(). I'm not sure why dup2() fails, but it does, returning EBADF (bad file descriptor). I tried installing bash and noticed exactly the same thing. dup2() seems to be implemented as a system call into the kernel, but that's where I get lost. I've been scouring the net and cannot find an answer. I must be doing something wrong, but I know not what. Does anybody have any helpful hints? 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 iD8DBQFDtGZXHl0iXDssISsRAjuLAKCFg/zGddsXpVH8rIe/m4n2I/OSTACaAoQf BDkJ30y7RJ634XazzPgGAWY= =w+LK -----END PGP SIGNATURE-----

Dec. 29, 2005

Re: [Wlug] Re: Wlug Digest, Vol 26, Issue 19

by Chuck Anderson

On Thu, Dec 29, 2005 at 12:54:29PM -0500, Carlton C. Stedman II wrote: > The situation you describe about the removable drives mounting in /media > suggests it is using udev, hal, d-bus and ivman. Your home system should FC3 and FC4 come preconfigured to use udev, hal, d-bus, and gnome-volume-manager. ivman doesn't ship with FC. When hal notices a new block device (via the kernel hotplug mechanism), it should call /etc/hal/device.d/50-fstab-sync.hal which is a symlink to /usr/sbin/fstab-sync. This is what creates the mount points in /media and adds/removes entries from /etc/fstab. Entries that have been added by fstab-sync are marked with "managed" in the options field. Then gnome-volume-manager mounts the device if the option "Mount removable drives when hot-plugged" is set. Since I've never needed to change the defaults here, I'm not sure how to fix the specific problem Bill is having. I would assume that removing all traces of manual configuration in /etc/fstab etc. should cause the default behavior to be restored.

Dec. 29, 2005

Re: [Wlug] OpenWrt

by Matt Higgins

I run OpenWrt at work and at home, it is a very nice piece of work, never had a lockup. If you have some more dough I recommend net4801 http://www.soekris.com/net4801.htm The one I have is currently running OpenBSD but is of course Linux friendly and you can do a lot more with it. -Matt On 12/23/05, Mike <mwp(a)sdf.lonestar.org> wrote: > At the last meeting we briefly discussed building a Linux Router from a > single board computer. I was poking around the net and found the OpenWrt > project. I'm curious if anyone has any experience with OpenWrt? > > Happy Holidays, > Mike > > OpenWrt: http://wiki.openwrt.org/FrontPage > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

Dec. 29, 2005

Re: Wlug Digest, Vol 26, Issue 19

by Carlton C. Stedman II

The situation you describe about the removable drives mounting in /media suggests it is using udev, hal, d-bus and ivman. Your home system should be using udev, but not sure if it has hal or d-bus; even if, doesn't sound like it has ivman. I'm not so sure about how to do this in FC, I'm a gentoo guy, but you'd need to have all of those installed and set up. This might be of some help: http://gentoo-wiki.com/HOWTO_ivman. You need udev and d-bus for hal, and then just need to start the hal daemon (hald). Then start ivman, and it should autodetect devices plugged in and put them into /media. For example, /media/usbdisk0 would be the first partion of the first usb disk plugged in (I do believe). It'll add new devices to your /etc/fstab. You can, however, have a bit more control over this, setting up a udev rule to make your disk use a specific device file, for example /dev/mydrive and then put a listing in /etc/fstab to mount /dev/mydrive at /media/mydrive. Then, when plugged in, udev will create the /dev/mydrive device file and ivman will detect it's creation and readiness and mount it at /media/mydrive. Spiffy stuff. For more information on writing udev rules: http://gentoo-wiki.com/UDEV_Overview#Writing_custom_udev_rules. Bill Mills-Curran <bill(a)mills-curran.net> wrote... > Subject: [Wlug] usb drive -- hotplug/automount > To: Worcester Linux Users Group <wlug(a)wlug.org> > Message-ID: <20051227205055.GA6082(a)bday.mills.curran> > Content-Type: text/plain; charset=us-ascii > > I have a question about hotplugging & USB and some differences I see > between 2 different FC3 systems (home & work). > > **** Home > > Initially, I configured my drive at home. I did NOT have the menu > item: > > Preferences -> Removable Storage > > set to "Mount removable drives when hot-plugged". Without realizing > that this was an option, I used manual entries in fstab: > > # usb drive > LABEL=usblinux /mnt/usb/linux auto defaults,user 0 0 > /dev/sde2 /mnt/usb/windows auto defaults,user 0 0 > /dev/sde1 /mnt/usb/camera auto defaults,user 0 0 > > This worked well & good. I was happy to be able to mount the > partitions as a user. Note that the linux partition has a label > "usblinux". > > Then, I moved the drive to my work machine. > > **** Work > > I plugged the drive in and was surprised to find that both partitions > automatically mounted in /media: > > /media/usbdisk > /media/usblinux > > I also saw that entries were added to /etc/fstab, reflecting the mount > points and device names. > > I recognized this as better action. > > Returning home... > > **** Home > > Plugging the drive in, I confirmed that nothing was happening in > /media. I found the entry to automount the drive in: > > Preferences -> Removable Storage > > and enabled it. I unplugged and plugged the drive, and it mounted > with this from df: > > Filesystem 1K-blocks Used Available Use% Mounted on > <snip> > /dev/sde1 72801276 1704196 67398920 3% /mnt/usb/camera > /dev/sde2 4176756 96 4176660 1% /mnt/usb/windows > > This is not what I wanted. It used my fstab entries, and it picked > the "camera" entry over the labeled entry. > > OK, so I deleted the fstab entries & tried again. This time nothing > mounted. > > **** What I'd like to happen. > > 1. Mount when plugged in. > > 2. Don't specify the device -- after all, some other (new) usb device > could disturb the device name. > > How do I get there? > > TIA, > Bill > > > ------------------------------ > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > > > End of Wlug Digest, Vol 26, Issue 19 > ************************************ > -- Carlton C. Stedman II, sageman(a)wpi.edu "To iterate is human, to recurse, divine." -- L. Peter Deutch

Dec. 29, 2005

usb drive -- hotplug/automount

by Bill Mills-Curran

I have a question about hotplugging & USB and some differences I see between 2 different FC3 systems (home & work). **** Home Initially, I configured my drive at home. I did NOT have the menu item: Preferences -> Removable Storage set to "Mount removable drives when hot-plugged". Without realizing that this was an option, I used manual entries in fstab: # usb drive LABEL=usblinux /mnt/usb/linux auto defaults,user 0 0 /dev/sde2 /mnt/usb/windows auto defaults,user 0 0 /dev/sde1 /mnt/usb/camera auto defaults,user 0 0 This worked well & good. I was happy to be able to mount the partitions as a user. Note that the linux partition has a label "usblinux". Then, I moved the drive to my work machine. **** Work I plugged the drive in and was surprised to find that both partitions automatically mounted in /media: /media/usbdisk /media/usblinux I also saw that entries were added to /etc/fstab, reflecting the mount points and device names. I recognized this as better action. Returning home... **** Home Plugging the drive in, I confirmed that nothing was happening in /media. I found the entry to automount the drive in: Preferences -> Removable Storage and enabled it. I unplugged and plugged the drive, and it mounted with this from df: Filesystem 1K-blocks Used Available Use% Mounted on <snip> /dev/sde1 72801276 1704196 67398920 3% /mnt/usb/camera /dev/sde2 4176756 96 4176660 1% /mnt/usb/windows This is not what I wanted. It used my fstab entries, and it picked the "camera" entry over the labeled entry. OK, so I deleted the fstab entries & tried again. This time nothing mounted. **** What I'd like to happen. 1. Mount when plugged in. 2. Don't specify the device -- after all, some other (new) usb device could disturb the device name. How do I get there? TIA, Bill

Dec. 27, 2005

Exim/MX/Mail forwarding

by Michael Zarozinski

Hi, We have 2 dedicated servers, I'm hoping someone can help save me some time and keep me from messing up the servers! Our 2 servers are: Server "A": 111.111.111.111 Server "B": 222.222.222.222 (not the real IPs obviously!) I've configured Exim to allow us to send email to a domain literal (so mail sent to michaelz(a)[222.222.222.222] works) What we'd like to do is have ALL email sent to server "A" go to server "B"... I know this can be done with MX files, but I'm not sure about setting up "domain zones" or if it's easier to just change some settings in Exim. Thank you! Michael Z

Dec. 27, 2005

Re: [Wlug] OpenWrt

by John Stoffel

Mike> At the last meeting we briefly discussed building a Linux Router Mike> from a single board computer. I was poking around the net and Mike> found the OpenWrt project. I'm curious if anyone has any Mike> experience with OpenWrt? I used to run LEAF/bering from the Linux Router project, but it seemed to die after a while and I didn't care for using an old PC with CDROM/floppy as my firewall anymore. I ended up moving to m0n0wall (http://m0n0.ch) on a WRAP board with three ethernet ports, http://www.pcengines.ch and I've been very happy. Don't bother getting a wireless card, just get a seperate Linksys WRT54G (or something like that) box and hang it off it's own network port. This setup works really nicely, and has really low power/noise, which is what I was after. m0n0wall is based on FreeBSD I admit, but that didn't stop me... :] John

Dec. 27, 2005

Re: [Wlug] USB drive & logical volumes

by Mike Leo

The reason we use logical volumes is to prevent any one volume from filling up / (which can also be accomplished with physical volumes, I know), but also to allow us to simply resize them somewhat on the fly. for instance, if /home becomes full, we can add additionally harddrives (internal or SAN) and resize the /home logical volume with the new space. This can be done without taking /home offline, although i've never done that. So I'm not sure how much of a benefit a logical volume would be on a fixed sized external drive. At least not in the way we use it. --- Bill Mills-Curran <bill(a)mills-curran.net> wrote: > Santa brought me a nice 80 GB "portable" USB drive. > My intended use > is a combination of backup and transporting personal > files to/from > work (I want to remove them from my work hard > drive). Both home and > work systems are FC3, but may be FC4 sometime soon. > > I was ready to partitioning (4 GB fat, remainder > ext3) when I started > reading up on logical volumes. They seem pretty > neat, but I wonder > if they are useful for a portable drive. In > particular, I can see > that some/all of the definitions for the group and > volume are in > /dev/mapper, so I'd have to duplicate some of the > setup on both > machines. > > > Any recommendations or experience? Would I be > better off with > physical partitions for this use? > > TIA, > Bill > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

Dec. 26, 2005