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Read Only FS on USB stick
by Andrew Greig 13 May '14

13 May '14

Hi All, I recently copied some files onto a USB stick, but now, I cannot delete them from the stick as the fs is readonly. I have tried to chmod, but no luck. I have tried to chmod as roo, still no good. Then I remembered that the fstab sometimes mounts removable devices readonly, but the only drives referenced in fstab are the swap, / and /home partitions. Where would I be able to change the permissions for this drive, please? OpenSuse 13.1 Andrew Greig

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screen resolution mismatch
by James Harper 13 May '14

13 May '14

I'm just setting up a new PC and the native resolution for the display is 1440x900. All the logfiles say the selected resolution is 1440x900, the screen configuration under gnome says 1440x900, but the display itself complains because the resolution is set to 1600x900, and there is about half an inch to the right that is off the screen. Any ideas? I guess I'll tinker with timings unless there is another easy fix... Thanks James _____________________________________ James Harper - Systems Technician Bendigo IT Bendigo: (03) 4433 9200 Melbourne: (03) 9098 0000 Email: James.Harper(a)bendigoit.com.au This email is intended only for the use of the addressee. You must not edit this email or any attachments without my express consent. Maxsum Solutions is not liable for any failed, corrupted or incomplete transmission of this email or any attachments or for any viruses contained in them. By opening any attachments, you accept full responsibility for the consequences. If you are not the intended recipient, any dissemination, reliance upon or copying of this email or any attachments is strictly prohibited, and you must immediately erase them permanently from your system, notify Maxsum Solutions and destroy any hard copies.

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Automatic Storage Configuration Documentation
by Huw Davies 13 May '14

13 May '14

Hi, I’m in the process of building a number of somewhat more complex Linux (Centos) SAN based environments. I need to document the storage layout (from the physical disk layout right through to the filesystems in their various volume groups) and hoped someone had a pointer to a tool that could produce nice, preferably HTML, documentation automatically. I have in the passed used a tool on AIX that did almost what I needed but adopting it for Centos would be very challenging (especially as it was written in Perl and I’m more of a Python guy). Huw Davies | e-mail: Huw.Davies(a)kerberos.davies.net.au Melbourne | "If soccer was meant to be played in the Australia | air, the sky would be painted green"

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Cross Compile Module for armv7
by Robert Brown 11 May '14

11 May '14

Hi A variation on a previous query: Can anyone make sense - or better still a process - out of this thread: http://www.cubieforums.com/index.php?topic=2427.0 My responses are authored CarryOnRewardless. The DVB-Realtek-RTL2832U-2.2.2-10tuner-mod_kernel-3.0.0-master folder contains source files for a module I need rtl2832.ko and some other related ones. I need to compile it for a 3.4 kernel on a sun4i armv7 platform so I get the kernel source from github sunxi. But running make ARCH=arm -C /home/user/linux-sunxi/ M=$PWD from folder /home/user/DVB-Realtek-RTL2832U-2.2.2-10tuner-mod_kernel-3.0.0-master gives errors suggesting it could find no Makefile in the linux-sunxi folder but it is clearly present. make: Entering directory `/home/user/linux-sunxi' scripts/Makefile.build:44: /home/user/DVB-Realtek-RTL2832U-2.2.2-10tuner-mod_kernel-3.0.0-master/Makefile: No such file or directory make[1]: *** No rule to make target `/home/user/DVB-Realtek-RTL2832U-2.2.2-10tuner-mod_kernel-3.0.0-master/Makefile'. Stop. make: *** [_module_/home/user/DVB-Realtek-RTL2832U-2.2.2-10tuner-mod_kernel-3.0.0-master] Error 2 make: Leaving directory `/home/user/linux-sunxi' I am obviously doing something fundamentally wrong but I cannot see it atm. Any ideas?

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May beginners workshop
by h 11 May '14

11 May '14

I am aspiring to be a Beginners Workshop groupie. Is there a Beginners Workshop this month? I cannot see anything on http://luv.asn.au/event/2014/04/10/month/all/all/1 Although I don't contribute, I do appreciate these, and would like to make sure I can get my fix this month... --

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Nexus tablet choice
by Russell Coker 07 May '14

07 May '14

I'm looking at buying a new tablet. It will mostly be for watching video, Youtube and movies downloaded from the net, but as with most general purpose computers it will get used for lots of other things. The main options I'm considering now are the Google Nexus tablets. The Nexus line seem to have good quality hardware, good specs, and reasonable prices. They also should be easier to root if I want to run Ubuntu or something on them later. For tablets with 16G of RAM the Nexus 7 is $299 and the Nexus 10 is $469. Currently the 32G Nexus 10 is out of stock so I'm mostly comparing the 16G Nexus 7 with the Nexus 10, if I choose the Nexus 7 then I'll think about whether it's worth paying for extra storage (probably will be given that there's no SD card support). Does anyone have any experience with them? What about comparing 10" and 7" tablets generally? Obviously 10" is better for watching movies and a lot better if more than one person is watching. 10" should also be better for blogging. Is the 10" tablet worth the extra $170 and losing the option of more storage (or alternatively waiting for Google to get stock)? https://play.google.com/store/devices/details?id=nexus_7_16gb_2013 https://en.wikipedia.org/wiki/Nexus_7_(2013_version) https://play.google.com/store/devices/details/Nexus_10_16GB?id=nexus_10_16gb https://en.wikipedia.org/wiki/Nexus_10 Above are the Play Store and Wikipedia pages for the tablets in question. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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mailing list servers bouncing email
by Russell Coker 06 May '14

06 May '14

It's a common configuration to have non-member posts to a mailing list be rejected. It seems that most list servers run from /etc/aliases or similar which means that mail has already been accepted by the time the list server sees it. Once mail has been accepted (SMTP code 250) it can be sent on, discarded, or a bounce message can be sent. In the case of spam (which often accounts for most non-member mail to a list) we don't want to generate a bounce message as that hurts innocent third parties. But in the case of members who send mail from their wrong address we want to inform them. Ideally a non-member post to a mailing list would get a SMTP level rejection (SMTP code 55x). When a real person sent the mail they get a bounce message and can re-send if appropriate, if a spam bot sent the mail then it gets discarded. http://postfwd.org/ What's the best way of getting it to work that way? I'm idly considering writing a script to take the list of members from Mailman and automatically generating a Postfwd configuration from it, the above URL describes Postfwd. One benefit of using Postfwd in that manner could be that anyone who subscribes to one list could be allowed to send mail to all lists on the same server, it doesn't have to be that way (Postfwd is configurable and generating more rules isn't difficult) but it seems like a good idea. The Mailman controls seem to only control posting access based on the membership of the list in question. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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Ubuntu Trusty upgrade
by Toby Corkindale 02 May '14

02 May '14

Hi all, Just thought I'd share some good news. Upgrading from Saucy to Trusty on a desktop was quite painless. By far and away the easiest one I've had with Ubuntu -- and I do tend to have a moderately customised system with non-free drivers and a whole lot of extra PPAs added to the apt sources. -Toby -- Turning and turning in the widening gyre The falcon cannot hear the falconer Things fall apart; the center cannot hold Mere anarchy is loosed upon the world

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PGP and IPSec
by Peter Ross 02 May '14

02 May '14

Hi, is there an established way of using PGP to assist an IPSec setup? I only found this here http://tools.ietf.org/html/draft-ietf-ipsec-openpgp-01 But it does not seem to be fleshed out. I could imagine to use PGP to create a single connection which is then used to communicate a shared key which is then used for IPSec setup. I somehow think it should be there but have not seen it. Regards Peter

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Disabling Debian/Ubuntu apt archives
by Toby Corkindale 02 May '14

02 May '14

Hi, Linux distros using the apt package management system tend to cache downloaded packages in /var/cache/apt/archives/ If you have many very similar machines set up, then you'll almost certainly have a HTTP proxy cache setup for them to retrieve packages through, to reduce huge duplication of downloads. This essentially obsoletes the /var/cache/apt/archives, though. And when you're running dozens of virtual machines, it'd be nice to avoid storing all these duplicate files. What's the right way to disable it? I see I can adjust the max size and age via the APT::Archives::Max{Age,Size} parameters, but what about just turning it off altogether? Cheers, Toby

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