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Re: [Wlug] Filesystem usage

by Jared Greenwald

This is my highly-custom Gentoo Laptop. laptop-wifi / # du --max-depth=1 -h 7.3M ./bin 260K ./dev 32M ./etc 50M ./lib 0 ./mnt 277M ./opt 15M ./tmp 0 ./sys 3.7G ./var 7.8G ./usr 14M ./boot 3.4G ./home 899M ./proc 9.5M ./sbin 19M ./root 0 ./media 0 ./.reiserfs_priv 20K ./laptop 17G . I'm sure I could trim this down as I have 1.7G in /var/tmp/portage (the place the portage actually builds packages from source) and 2.5G in /usr/portage/distfiles (the place where portage stores the source kits) - both of which are not essential after the package is built and installed. On 6/13/06, Mike Perry <mwp(a)sdf.lonestar.org> wrote: > Hi there, > I am curious on some statistics and I was wondering you could help me > out. I'm wondering what the output of the following command is on your > system: > > root@chao:/tmp# cd / > root@chao:/# du --max-depth=1 -h > 4.2M ./bin > 253K ./dev > 36M ./etc > 336M ./lib > 0 ./mnt > 436M ./opt > 0 ./srv > 18K ./tmp > 0 ./sys > 743M ./var > 3.8G ./usr > 38M ./boot > 22G ./home > 900M ./proc > 9.0M ./sbin > 4.5M ./root > 0 ./media > 0 ./initrd > 28G . > > > The system I ran on above is an ubuntu desktop machine that hasn't been > rebuild in over a year closer to a year and half. > > For comparison a relatively stock ubuntu machine I have looks like: > > 4.4M ./bin > 103K ./dev > 12M ./etc > 167M ./lib > 0 ./mnt > 0 ./opt > 8.0K ./tmp > 0 ./sys > 209M ./var > 1.6G ./usr > 19M ./boot > 2.3M ./home > 513M ./proc > 9.9M ./sbin > 260K ./root > 0 ./media > 0 ./backup > 0 ./initrd > 2G . > > > Thanks, > Mike > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

June 14, 2006

Filesystem usage

by Mike Perry

Hi there, I am curious on some statistics and I was wondering you could help me out. I'm wondering what the output of the following command is on your system: root@chao:/tmp# cd / root@chao:/# du --max-depth=1 -h 4.2M ./bin 253K ./dev 36M ./etc 336M ./lib 0 ./mnt 436M ./opt 0 ./srv 18K ./tmp 0 ./sys 743M ./var 3.8G ./usr 38M ./boot 22G ./home 900M ./proc 9.0M ./sbin 4.5M ./root 0 ./media 0 ./initrd 28G . The system I ran on above is an ubuntu desktop machine that hasn't been rebuild in over a year closer to a year and half. For comparison a relatively stock ubuntu machine I have looks like: 4.4M ./bin 103K ./dev 12M ./etc 167M ./lib 0 ./mnt 0 ./opt 8.0K ./tmp 0 ./sys 209M ./var 1.6G ./usr 19M ./boot 2.3M ./home 513M ./proc 9.9M ./sbin 260K ./root 0 ./media 0 ./backup 0 ./initrd 2G . Thanks, Mike

June 14, 2006

Anyone actually using SPF and SRS in a Sendmail production env?

by Dwight A. Ernest

Is anyone here actually using SPF and SRS in a Sendmail production environment? If so, I'd love to ask a few questions about resources, performance, and real-world experience. Thanks.

June 10, 2006

Re: [Wlug] SoC's with USB host

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Mike Leo wrote: > http://www.linuxdevices.com/news/NS3880195342.html > > This is what you should have used for your router Andy! You're right - that's pretty cool! Its tempting to buy it just for yucks (but one would have to buy the boards also so the connectors will line up). Thanks for the pointer! 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 iD8DBQFEihUsHl0iXDssISsRArc7AJ4+vcr4+GXk3a9FIP5R12aygLkQ3wCcCbfZ cYmfbGWqIEL7e4q6U3+dJOI= =C9n4 -----END PGP SIGNATURE-----

June 10, 2006

Re: [Wlug] SoC's with USB host

by Mike Leo

http://www.linuxdevices.com/news/NS3880195342.html This is what you should have used for your router Andy! --- Jamie Guinan <guinan(a)bluebutton.com> wrote: > > To follow up on discussion about USB capabilities, I took a quick look > at which platforms support USB host (so you can plug webcams, etc. > *into* it), > > $ cd linux-2.6.16 > $ find . | grep ohci > ... > ./drivers/usb/host/ohci-s3c2410.c [ Samsung ARM 920T ] > ./drivers/usb/host/ohci-sa1111.c [ StrongARM(SA1110) companion Chip ] > ./drivers/usb/host/ohci-lh7a404.c [ Sharp ARM920T ] > ./drivers/usb/host/ohci-ppc-soc.c [ Various PowerPC (Freescale) ] > ./drivers/usb/host/ohci-au1xxx.c [ AMD (formerly Alchemy) MIPS Au1000 ] > ./drivers/usb/host/ohci-pxa27x.c [ XScale ARM (successor to SA1110] > ... > > Those modules are thin hardware-specific glue around the main ohci/usb > kernel code. > > I think the gumstix is a pxa25x, and only the 27x supports USB host. > > Development boards for a lot of these are priced rather high for the > typical hobbyist budget, from a few hundred $$ on up, > > http://www.embeddedplanet.com/products/sbc.asp > http://dkc3.digikey.com/PDF/T062/0378.pdf > http://www.hitechglobal.com/boards/ARM920T.htm > > It looks like Gumstix and routerboard are the cheapest available > products in this class. And they're great, but hopefully in the > we'll see more things aimed at hobbyists, with USB host capability. > > -Jamie > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

June 9, 2006

SoC's with USB host

by Jamie Guinan

To follow up on discussion about USB capabilities, I took a quick look at which platforms support USB host (so you can plug webcams, etc. *into* it), $ cd linux-2.6.16 $ find . | grep ohci ... ./drivers/usb/host/ohci-s3c2410.c [ Samsung ARM 920T ] ./drivers/usb/host/ohci-sa1111.c [ StrongARM(SA1110) companion Chip ] ./drivers/usb/host/ohci-lh7a404.c [ Sharp ARM920T ] ./drivers/usb/host/ohci-ppc-soc.c [ Various PowerPC (Freescale) ] ./drivers/usb/host/ohci-au1xxx.c [ AMD (formerly Alchemy) MIPS Au1000 ] ./drivers/usb/host/ohci-pxa27x.c [ XScale ARM (successor to SA1110] ... Those modules are thin hardware-specific glue around the main ohci/usb kernel code. I think the gumstix is a pxa25x, and only the 27x supports USB host. Development boards for a lot of these are priced rather high for the typical hobbyist budget, from a few hundred $$ on up, http://www.embeddedplanet.com/products/sbc.asp http://dkc3.digikey.com/PDF/T062/0378.pdf http://www.hitechglobal.com/boards/ARM920T.htm It looks like Gumstix and routerboard are the cheapest available products in this class. And they're great, but hopefully in the we'll see more things aimed at hobbyists, with USB host capability. -Jamie

June 9, 2006

Re: [Wlug] Problem with usermod

by Adam Keck

Hello Chuck, Another thing you can do is to pass init=/bin/bash to the kernel via grub at boot time. / will be mounted ro; remount it and /tmp rw and then edit /etc/group (vi /etc/group, vigroup (sp?), or use usermod by mounting /usr as well). This is why it is a good idea to use grub passwords on public machines ;-). -Adam On May 10, 2006, at 10:24 AM, Chuck Noyes wrote: > Hi All, > > I'm running ubuntu (brezzy), and I just shot myself in the foot.... > > I went to add my username to a new group, but forgot to include the > other groups that I belong to in the command. The command I used was > 'sudo usermod -G <new-group> <my-username>'. Now I only belong to > <new-group>. That removed my username from the other groups I belonged > to, including the admin group. > > Is there a way undo what I did? I do have a copy of /etc/group before > the change. > > Thanks, > -Chuck > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug

June 4, 2006

Re: [Wlug] dhcpd question

by Eric Martin

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Thanks for the pointers on that, I will incorporate those changes. About that comment, I re-read the config file and I see exactly what you're talking about, I just forgot to delete the comment before I emailed this off originally. Chuck Anderson wrote: > On Sat, Jun 03, 2006 at 07:11:24AM -0400, Eric Martin wrote: >> # Everybody in here will not get an ip whatsoever pool { range >> 10.10.20.20 10.10.20.127; deny known-clients; host slide { >> hardware ethernet 00:c0:9f:15:d7:3f; } } pool { range >> 10.10.20.128 10.10.20.253; deny unknown-clients; host fixed { >> hardware ethernet 00:11:22:33:44:55; # >> fixed-address 10.10.20.25; } } } > > You've made several of the classic mistakes that everyone makes at > first when learning ISC dhcpd (including myself :-) ). > > host {} blocks are always global in scope, regardless of where in > the configuration they are placed. Putting them inside pool {} > blocks just confuses readers into thinking they are locally scoped. > So, in this configuration both hosts "slide" and "fixed" are > considered known-clients, and they will both get dynamic addresses > out of the second pool unless the fixed-address was uncommented for > host "fixed" in which case "deny known-clients" etc. doesn't apply > at all (they only apply to dynamic assignments). > > Another thing: fixed-address assignments must not be inside of pool > ranges. The server will not check for such conflicts of > static/dynamic addressing, so you will get duplicate IP assignments > to more than one client in case fixed-addresses and ranges overlap. > You can exclude the fixed-addresses like this: > > pool { range 10.10.20.20 10.10.20.24; range 10.10.20.26 > 10.10.20.127; [....] } > > Common practice is to not intersperse fixed-addresses throughout > multiple pool ranges, to prevent unwieldy configurations with > multiple range statements per pool. Rather, fixed-addresses are > usually assigned contiguously together outside of a single pool > range. > > Finally, when you say "everybody in here will not get an ip > whatsoever", that is not true. The "deny known-clients" > implicitely does "allow unknown-clients", and vice versa, so > unknown-clients (those without any matching host {} declaration) > will get dynamic addresses out of the first pool. > _______________________________________________ Wlug mailing list > Wlug(a)mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (GNU/Linux) iD8DBQFEgcPUaI8VEtSi4H8RAi7mAKCJ1C8E2FH4zJSItxUaBNukbs0o5ACfQW20 qUoOtQqOyIBa+iy+upTbTkg= =f9/t -----END PGP SIGNATURE-----

June 3, 2006

Re: [Wlug] dhcpd question

by Chuck Anderson

On Sat, Jun 03, 2006 at 07:11:24AM -0400, Eric Martin wrote: > # Everybody in here will not get an ip whatsoever > pool { > range 10.10.20.20 10.10.20.127; > deny known-clients; > host slide { > hardware ethernet 00:c0:9f:15:d7:3f; > } > } > pool { > range 10.10.20.128 10.10.20.253; > deny unknown-clients; > host fixed { > hardware ethernet 00:11:22:33:44:55; > # fixed-address 10.10.20.25; > } > } > } You've made several of the classic mistakes that everyone makes at first when learning ISC dhcpd (including myself :-) ). host {} blocks are always global in scope, regardless of where in the configuration they are placed. Putting them inside pool {} blocks just confuses readers into thinking they are locally scoped. So, in this configuration both hosts "slide" and "fixed" are considered known-clients, and they will both get dynamic addresses out of the second pool unless the fixed-address was uncommented for host "fixed" in which case "deny known-clients" etc. doesn't apply at all (they only apply to dynamic assignments). Another thing: fixed-address assignments must not be inside of pool ranges. The server will not check for such conflicts of static/dynamic addressing, so you will get duplicate IP assignments to more than one client in case fixed-addresses and ranges overlap. You can exclude the fixed-addresses like this: pool { range 10.10.20.20 10.10.20.24; range 10.10.20.26 10.10.20.127; [....] } Common practice is to not intersperse fixed-addresses throughout multiple pool ranges, to prevent unwieldy configurations with multiple range statements per pool. Rather, fixed-addresses are usually assigned contiguously together outside of a single pool range. Finally, when you say "everybody in here will not get an ip whatsoever", that is not true. The "deny known-clients" implicitely does "allow unknown-clients", and vice versa, so unknown-clients (those without any matching host {} declaration) will get dynamic addresses out of the first pool.

June 3, 2006

Re: [Wlug] dhcpd question

by Bill Smith

On Sat, 2006-06-03 at 07:11 -0400, Eric Martin wrote: > Basically what you want is at least two pools. The first pool will do > the most of your address assignments, but if you specify the host, it > will deny it due to the deny known-hosts. The second pool I'm using > for static assignments, but it's crucial to have the deny > unknown-clients or else anybody you deny up top will be able to get an > ip here. > As usual, questions, comments anything else is always welcome. Nice work, Eric. We knew you had it in you, if you stuck with it long enough. ;) Thanks for sharing your solution, too. ....Bill

June 3, 2006