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alternate OS voids warranty
by James Harper 21 Jul '13

21 Jul '13

Not necessarily Linux related, but I just got off the phone with a certain large computer manufacture trying to resolve a failed harddisk on a 3 month old computer, and they claim that installing an alternate OS has voided the warranty. In this case the computer shipped with Win7 and the "alternate OS" was XP, but I find the claim ludicrous as I install Linux on all sorts of PC's and the warranty callcenter has never skipped a beat as long as I can demonstrate the fault in an obvious way. This particular computer is a different brand though... What's my best avenue to force the issue? Or are they within their rights to say that I have voided my warranty? Thanks James

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Statistical spam filters
by Jason White 21 Jul '13

21 Jul '13

This issue arose in conversation recently, thus I thought it worth asking here. Which tools are state of the art these days in statistical spam filtering? (Free/open-source and running on Linux are both assumed.) When I last looked (some years ago), the top options appeared to be, in no particular order: Spamassassin (rules + statistical classifier). It works well for many people; the statistical classifier used to be very memory-intensive and I know people for whom SpamAssassin didn't give accurate results even after training. CRM114: this is what I am currently using for my incoming mail. It appears to be in the midst of a rewrite as a library with support for various scripting languages. My initial experiences with it weren't good, but I tried it again several years ago and, this time, it quickly surpassed SpamAssassin when trained to classify my mail. Dspam: also has a good reputation, seems to be maintained to some extent. When last I looked at it in detail, a number of years ago, there were plans to add interesting features for allowing users to share filters so that a new user wouldn't have to train it from an empty database and one user's training could affect other users' filters. There were other projects around, but the above appeared to be the most sophisticated. So it's now 2013... Any changes? Comments?

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Samba 4 and LDAP
by Peter 21 Jul '13

21 Jul '13

Hi all, I just play around with Samba 4. At the moment, there is no official support for external LDAP (e.g. OpenLDAP). My original understanding was: We want Samba 4 "out" as fast as possible so we concentrate on "core functionality" (e.g. using internal LDAP, DNS etc.), and look at issues related to external sources later. Yesterday I found this: ---- http://us.generation-nt.com/re-samba-windows-8-pro-no-domain-logon-possible… (20th Sep 2012) We spent considerable effort over a period of years in attempting to make this possible. It is not. Even if it was, it would not involve 'simply' reading the companies LDAP server, it would be a very intrusive change no more acceptable than using our own built-in LDAP server. Andrew Bartlett ---- I wonder whether it means: Samba will not use external LDAP at all (that would rule it out for me here) "Very intrusive changes".. to Samba or LDAP? Does anybody has insight of the "roadmap", especially about the future of external LDAP sources? I know that you can make it work, somehow, now. But if it does not have support by the Samba team it will be fiddly and fragile and you have to worry about future releases all the time. I am not really keen on that. Regards Peter

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The H website is closing down
by Chris Samuel 20 Jul '13

20 Jul '13

As Steve linked to The H's posts regarding what was new in the 3.10 kernel I thought I'd share the sad news that The H is having to close down due to a lack of income: http://www.h-online.com/open/news/item/The-H-is-closing-down-1920027.html All the best, Chris -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC This email may come with a PGP signature as a file. Do not panic. For more info see: http://en.wikipedia.org/wiki/OpenPGP

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Flynn
by Toby Corkindale 19 Jul '13

19 Jul '13

Hello all, I'd like to bring this project to your attention. It's an open-source set of components to build a platform-as-a-service system. I don't know if you've seen Docker or Dokku, but this is a logical extension of Dokku (and includes the developer of Dokku). It's inspired by Heroku, and aims to provide software to let you run your own clusters so as to make deploying containerised applications and backing services easy for devs and ops. We're sponsoring it, but they're looking for some more sponsorship to reach their goal. (The sponsorship is to allow the devs to work on it full-time to fast-track the development; without sponsorship it'll still get there eventually.) https://flynn.io/ Cheers, Toby

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what's a good GUI MUA?
by Russell Coker 17 Jul '13

17 Jul '13

I'm idly considering switching away from Kmail. What's a good replacement? I don't want much in the way of features, just basic sending and receiving mail with offline-IMAP. Viewing HTML mail, signing, encrypting, and decrypting via GPG, and an addressbook that also includes a cache of recent addresses. Also I'm idly considering moving my archive of 100,000 old messages to an IMAP server on my LAN and have my laptop access it via offline IMAP. I've got a bunch of folders with about 10,000 messages in each. Am I likely to have any problems doing this? The archive isn't going to change often (only when I manually move messages from the current folders on either my laptop or my workstation), so I'd probably have my workstation poll it once a week and my laptop poll it manually. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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Easily find all the child processes of a process?
by Chris Samuel 17 Jul '13

17 Jul '13

Hi folks, This is likely an easy one, but my brain is fading rapidly at the moment.. Is there a way to easily collect all child (and grandchild, etc) processes of a particular process? I know I can do ps --ppid $PID to get the immediate children, and I can use pstree -p $PID to see all the descendants in graphical form, but I want to get an easy to parse list. Any ideas, or is this a case of writing it myself? cheers! Chris -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC

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What's a good xterm and desktop environment
by Russell Coker 17 Jul '13

17 Jul '13

The latest Debian/Unstable has a newer buggier version of Konsole and I'm looking for a new Xterm type program. An ideal Konsole replacement would allow configuration of the field split characters for double-click copy/paste and have a slider at the side for scrolling back (xterm allows the mouse wheel but doesn't have a slider). It would also allow ^+ and ^- to be used for changing font size (as all web browsers seem to do). I'm now in the process of switching from Kmail to Claws. Claws isn't nearly as polished as Kmail (EG it doesn't allow arrow keys to scroll through the list of messages) and isn't as threaded but seems more solid. What's a good desktop replacement for KDE? I want something that looks like OS/2 2.0+, is reasonably fast (not the slow login of modern KDE), and which has widgets for times in multiple time zones and clipboard management. Thanks.

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Re: Getting started with ZFS
by Petros 17 Jul '13

17 Jul '13

Quoting Tim Connors > I've got one for you; just came in on the mailing list (someone got stale > mounts when their kernel nfs server restarted): >> ZFS and the NFS kernel server are not that tightly integrated. >> >> When you do a 'zfs set sharenfs="foo,bar" pool/vol' of a 'zfs >> share >> pool/vol', the zfs tools just give a call to the NFS kernel server >> saying 'Hey I want you to share this over NFS'. That's what it should do. Under FreeBSD it sends a HUP to mountd - that's it. >> >> If the NFS kernel server is restarted it unshares everything and only >> reads back whatever is in /etc/exports. This is actually expected as >> NFS doesn't know anything about ZFS. Doing a >> 'zfs share -a' exports all your NFS/SMB shares again. Yes, it is a dependency. In general /etc/init.d or /etc/rc.d .. scripts take care of it so there is room for improvement if it is not done yet. >> When you don't use your system native tools, or when someone tries to >> solve something at the wrong layer (zfs trying to mess around with >> NFS? It uses - it just has another list as /etc/exports. It's not a big deal, I would think. ZFS changes the way to work with filesystems in may ways. Who would create/clone/destry/move around filesystems as I do with ZFS now? I have 164 ZFS filesystems on the system I just queried. It makes sense to keep the list of exports here. On a ZFS system, /etc/exports is a "legacy file". BTW: the ZFS hierarchy gives you better control access to parts of the directory than on other filesystems, because it is easy to create a new ZFS for a directory tree and give it different export options. Regards Peter

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Re: Getting started with ZFS
by Toby Corkindale 16 Jul '13

16 Jul '13

On 16/07/13 09:45, Petros wrote: > Quoting "Tim Connors" <tconnors(a)rather.puzzling.org> > >> Don't ever use more than 80% of your file system? Yeah, I know that's not >> a very acceptable alternative. > > The 80% is a bit of an "old time myth", I was running ZFS with higher > usage under FreeBSD until I hit the "slowness". Chipping in with a bit of real-world info for you here. Yes, ZFS on Linux still suffers from massive slowdowns once you run out of most of the free space. It's more than 80%, I'll grant, but not a whole lot - maybe 90%? > BTW: I don't use dedup. Firstly because I use cloning many times and > after that: Well, that are changes unique to the ZFS in question. > > I have problems to come up with a scenario to use it. But I am pretty > sure someone asked for it. Maybe someone running a big big server farm > and distributing copies of many many Gigabytes of data to many VMs on > the same box? Dedup is really painful on zfs. Attempting to use it over a multi-terabyte pool ended in failure; using it just a subset of data worked out OK, but ended up with >50GB of memory in the server to cope. Fine for a big server, but how many of you are running little fileservers at home with that much? You do save on a fair bit of disk space if you're storing a pile of virtual machine images that contain a lot of similarities. -Toby

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