Re: [Dorset] Suggestions for distro to run email server and POP3/IMAP.

[Tim Waugh]

Probably obvious, but when you use containers do make sure you have a
solution in place for keeping current with updates.

Tim.
*/

On Wed, 3 Jan 2024 at 16:48, Hugh Frater  wrote:
>
> I was going to suggest, docker is the answer here. You don’t even need a
> base distro, as you could just host the docker image of choice on a
> container runner such as Amazon or Azure.
>
> Sent from my iPhone
>
>
> On Wed, 3 Jan 2024 at 16:18, Ralph Corderoy  wrote:
>
> > Hi Paul,
> >
> > > you may like to take a look at Docker Mailserver
> >
> > Thanks Paul, you beat me to it.  :-)
> >
> > $ scan -forma '%{date}' p
> > Wed, 3 Jan 2024 16:05:51 +
> > Wed, 03 Jan 2024 16:07:45 +
> > $
> >
> > --
> > Cheers, Ralph.
> >
> > --
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> >
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Re: [Dorset] Virtual Box Problems

[Tim Waugh]

Have you tried Gnome Boxes? It's user-friendly Gnome UI for the
'native' virtualization which uses libvirtd and kvm (or qemu if
emulating another architecture).

Or, for more options and configurables, use virt-manager which is
libvirtd's own UI.

Tim.
*/

On Thu, 28 Dec 2023 at 07:44, Terry Coles  wrote:
>
> Hi,
>
> Many moons ago, I installed a copy of Windows 10 under Virtual Box so
> that I could access the Satnav that I had at the time.  My latest Satnav
> is connected to the WiFi network and doesn't need a third-party OS, so I
> stopped using Windows.
>
> My wife received a Loklik Craft Cutter for Christmas, which is supposed
> to be accessible from iOS, Android,  MacOS or Windows. Neither of the
> Mobile Apps work because (I believe) of a parsing error in the code to
> register the supplied Idea Studio Software. This was last updated just
> before Christmas, and I suspect that's where the bug was introduced.
>
> I therefore resurrected my old Windows installation in Vbox and
> successfully installed and the registered the software.  However, I
> can't get it to work, I think because the image that is being used dates
> back to 2021 and so is missing a lot of updates.  When I try to update
> it, the machine locks up and when I suppress the updates, it still
> doesn't work because I can't get the Bluetooth connection to show up in
> the guest.
>
> My next thought was to start again from scratch and install a brand new
> VM using the original Windows installation media. However, before I do
> that, I'd like to consider alternatives to Virtual Box.  I originally
> used VMWare (many moons ago), but moved over to Virtual Box when
> (K)Ubuntu started packaging in their repositories.  However, both of
> these tools have always given me grief with USB support, and it has been
> necessary to install 'Guest Additions' packs to get this to work.  Even
> then it's a pain
>
> Can anyone recommend an alternative?
>
> --
> Terry Coles
>
>
> --
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Re: [Dorset] Last nights mtg

[Tim Waugh]

On Wed, 8 Nov 2023 at 12:13, CA Wills  wrote:
> Connection:
> dnssd://Brother%20HL-L2350DW%20series._ipp._tcp.local/?uuid=e3248000-80ce-11db-8000-bcf4d4b410fc
[...]
> I don't know if this is of any help but the connection info looks
> suspiciously long to me and I think Tim mentioned something about the
> 'dnssd' ?

Yes, what I'd mentioned is that resolving a dnssd address to an IP
address needs help from the printer, so if it's asleep that might be
why it stays asleep.

It's possible that changing the connection would help, to some other
type based on the IP address (I don't know what connection types
Brother printers support I'm afraid, but the GUI will). Of course,
resolving the IP address to a MAC address _also_ needs the printer's
help, but the ARP cache on the client end might help and you've said
it's a statically-allocated address.

Tim.
*/


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Re: [Dorset] Next Meeting - Tonight at 8 pm

[Tim Waugh]

Hi all,

I'm afraid I won't be able to join tonight.

Tim.
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Re: [Dorset] Problem Colour Printer

[Tim Waugh]

Is that printer able to print its own test page?

Tim.
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Re: [Dorset] Links from 2022-12-06's Pub Meet.

[Tim Waugh]

On Sat, 10 Dec 2022 at 15:27, Stephen Wolff 
wrote:

> Hi Ralph,
>
> > Unified Modeling [sic] Language is at the end of a long lineage of
> > systems for using diagrams to analyse requirements, develop software,
> > and document behaviour.  It grew out of the Object Orientated movement.
> > https://en.wikipedia.org/wiki/Unified_Modeling_Language
>
> What I tried to say in my previous reply (which seemed to be empty in my
> mail client) - was that I came across something called ‘Mermaid’ recently -
> which is a tool for diagramming - including UML -
> https://mermaid-js.github.io/mermaid/#/


Yes, and we use mermaid-js for representing upgrade paths for a specific
type of software (OpenShift operators):
https://olm.operatorframework.io/docs/contribution-guidelines/upgrade-graphs/

(Quick ref: Each operator knows which previous version(s) it can upgrade
directly from. A 'channel' is a named version stream of a particular
operator. An operator 'catalog' is a collection of operators and channels.)

I've also used sequence diagrams quite a lot, sometimes with UML along with
eg. this:
https://lucidchart.zendesk.com/hc/en-us/articles/208029986

but mostly with mermaid-js.

Tim.
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Re: [Dorset] Next Meeting - Tonight at 8 pm

[Tim Waugh]

I won't be able to make it this evening I'm afraid.

Tim.
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Re: [Dorset] Links from Jitsi meeting 8/6/2022

[Tim Waugh]

On Wed, 8 Jun 2022 at 11:51, Hugh Frater  wrote:

> It was my ramblings about the state of housing stock in the private rental
> sector, specifically in relation to the quality and inspection of
> electrical installations that prompted the link to bimdl.com
>
> It's my understanding that it is a platform where information about the
> built environment (buildings, work/school/home etc) can be stored in an
> easily accessible and verifiable ledger.  This information could be things
> like energy performance certificates, electrical inspection reports, fire
> alarm servicing reports etc.
>

That's exactly it.

Tim.
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Re: [Dorset] Next Meeting - Tonight at 8 pm

[Tim Waugh]

I have broadband issues today so unfortunately I won't be able to join this
time.

Tim.
*/

On Tue, 5 Apr 2022 at 13:53, Terry Coles  wrote:

> All,
>
> The next Online Meeting is tonight at 8 pm using Jitsi.
>
> Simply click on the following link and you will be taken to the Meeting
> using your default browser:
>
> https://meet.jit.si/dorset-lug
>
> Chrome or Chromium are probably better than Firefox for using Jitsi.  An
> alternative to installing one of those two is to obtain it bundled
> especially
> for Jitsi from:
>
> https://github.com/jitsi/jitsi-meet-electron/releases
>
> This should be as simple as
>
> wget -q https://github.com/jitsi/jitsi-meet-electron/releases/latest/
> download/jitsi-meet-x86_64.AppImage
> 
> chmod +x jitsi-meet-x86_64.AppImage
> ./jitsi-meet-x86_64.AppImage
>
> and then entering ‘dorset-lug’ as the meeting ID.
>
> Hope to see you all this evening.
>
> --
>
>
>
> Terry Coles
>
>
>
> --
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Re: [Dorset] fstrim weirdness

[Tim Waugh]

On Thu, 10 Feb 2022 at 11:05, Hamish McIntyre-Bhatty 
wrote:

> The second command says it was "Passed" three days ago, but I don't know
> if that means it ran. There are no other timers in the output from that
> command.
>

We only asked for the fstrim timer. 'systemctl list-timers' will show you
all the timers.

Look in the logs to see if it ran?

journalctl -u fstrim

Tim.
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Re: [Dorset] fstrim weirdness

[Tim Waugh]

On Wed, 9 Feb 2022 at 17:57, Hamish McIntyre-Bhatty 
wrote:

> I finally got around to that, only to find that it was already enabled,
> and apparently not doing anything. As I don't leave my systems on 24/7,
> is it safe to assume that the timer isn't firing when the system is
> booted up later, after the configured time for TRIM has passed?


This depends on the configuration of the timer. The 'Persistent' field
controls this (see systemd.timer(5) ).

What does this say?:
systemctl show fstrim.timer | grep Persistent

Also, find out when it last triggered:
systemctl list-timers fstrim

Tim.
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Re: [Dorset] Freenode

[Tim Waugh]

This looks like a fairly good (short) summary:
https://www.kline.sh/

Tim.
*/


On Wed, 19 May 2021 at 15:38, Neil Stone  wrote:

> Essentially a forced takeover from someone that was appointed a director,
> despite all of the assurances that were put in place prior to that
> happening... irc.libera.chat is where most of the staff have gone and
> channels are migrating to.
>
> On Wed, 19 May 2021 at 15:01, Hugh Frater  wrote:
>
> > Tl;Dr?
> >
> >
> > On Wed, 19 May 2021 at 11:25, Neil Stone  wrote:
> >
> > > Ladies and Gentlemen,
> > >
> > > There's been a bit of a s**t storm going on with the Freenode network
> it
> > > seems (all behind the scenes).
> > >
> > > Some details are available via:
> > > https://fuchsnet.ch/freenode-resign-letter.txt
> > > https://web.archive.org/web/20210514121343/https://p.haavard.me/407
> > > https://gist.github.com/joepie91/df80d8d36cd9d1bde46ba018af497409
> > > http://techrights.org/2021/05/13/private-internet-access-and-freenode/
> > > https://coevoet.fr/freenode.html
> > >
> > > I've not been involved in any of these discussions, I'm just raising
> > > awareness for those (like me) that may have been unaware 'till now.
> > >
> > > Keep doing the do...
> > >
> > > Neil
> > > --
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> >
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Re: [Dorset] Next Meeting - Tonight at 8 pm

[Tim Waugh]

On Tue, 6 Apr 2021 at 14:50, Terry Coles  wrote:

> All,
>
> The next Online Meeting is tonight at 8 pm using Jitsi.
>
> Simply click on the following link and you will be taken to the Meeting
> using your default browser:
>
> https://meet.jit.si/dorset-lug
>
> Chrome or Chromium are probably better than Firefox for using Jitsi.  An
> alternative to installing one of those two is to obtain it bundled
> especially
> for Jitsi from:
>
> https://github.com/jitsi/jitsi-meet-electron/releases


I noticed it's also packaged on flathub:

https://flathub.org/apps/details/org.jitsi.jitsi-meet

Tim.
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Re: [Dorset] CentOS petition

[Tim Waugh]

Here's the latest about this:

https://www.redhat.com/en/blog/new-year-new-red-hat-enterprise-linux-programs-easier-ways-access-rhel

Tim.
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[Dorset] Intel RST?

[Tim Waugh]

Hi,

I have a laptop with a spare 2.5" drive bay I'd like to install a new disk
into (and run Linux on).

The laptop uses Intel Rapid Storage Technology, which seems to be some sort
of RAID controller. I can switch it to regular AHCI in the BIOS, but if I
do that I lose the ability to dual boot with the pre-installed OS.

Has anyone come across this before? Is there a way to stick with Intel RST
but have un-RAIDed disks installed?

Alternatively, is there a way to boot into the (Windows) installation on
the already-RST-formatted disk, after switching the BIOS to AHCI? Obviously
I could switch the BIOS back to RST if need be for booting on that, but can
that be avoided?

Tim.
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Re: [Dorset] Distributed computing for COVID

[Tim Waugh]

On Mon, 14 Dec 2020 at 09:50, Hamish McIntyre-Bhatty 
wrote:

> I was wondering, now that there are multiple vaccines in development/in
> use, whether we still think it's worth doing distributed computing for
> COVID research.
>

I plan to continue for the moment at least. Even though the aim is to find
something new, which must then go through lengthy safety trials etc, along
the way some other insight might suggest a faster approach using something
pre-existing. In any case, at this point I have no idea when vaccination
might roll out to my age group; it's still possible it would be after a
safety trial of some new discovery.

There are lots of things no-one knows about any of the vaccines, notably
how long they will last, or how long that time compares with the time it
would take to roll out a refresh.

Tim.
*/
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Re: [Dorset] New BOINC project that does computing for COVID-19

[Tim Waugh]

Just spotted this: update on which existing drugs have come out on top
so far, and an end date for the project (end of July).

https://translate.google.com/translate?sl=auto=en=https%3A%2F%2Fwww.elconfidencialdigital.com%2Farticulo%2Fvivir%2Festudio-csic-4000-voluntarios-concluye-medicamentos-eficaces-coronavirus%2F20200626132551147372.html

Tim.
*/


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Re: [Dorset] Ibercivis Down?

[Tim Waugh]

It's power maintenance. They're hoping to be back online today I think.

https://boinc.ibercivis.es/

Tim.
*/

On Thu, 18 Jun 2020 at 06:10, Terry Coles  wrote:
>
> I've been unable to upload any Tasks for a day or two and the Ibercivis
> website appears to be down.
>
> Has anyone else seen this?  I can't find any references to the project being
> off-line on the web.
>
> I have a dozen completed tasks and I don't know whether to cut my losses and
> focus on Rosetta.
>
> --
>
>
>
> Terry Coles
>
>
>
> --
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Re: [Dorset] New BOINC project that does computing for COVID-19

[Tim Waugh]

On Fri, 15 May 2020 at 10:29, Hamish McIntyre-Bhatty
 wrote:
> I'm going to have one last go at getting GPU computing to work for
> Folding soon, but if I can't make it work, does anyone think it's worth
> doing CPU folding, or are the contributions so small as to be pointless?

The CPU folding is important. Some of the simulations are only made
available for CPU work.

> Tim, I'd be interested to see how your KVM computing is going - you said
> it was very slow over the call, but hoping it will speed up. I probably
> won't do it, but I'm interested to see how well it works.

Well, it's hard to say because of the estimated time remaining being
so broken. But some tasks have completed so we can compare.

Here is the 'bare metal' version, actually running inside a podman container:
https://boinc.ibercivis.es/ibercivis/show_host_detail.php?hostid=2288

The measured floating point and integer speeds are 6.53b and 136.5b
ops/s, and the tasks generally take about 30,000s for v0.01 and 3,500s
for v0.02.

Here's a VM I was using:
https://boinc.ibercivis.es/ibercivis/show_host_detail.php?hostid=3505

and the measured floating point and integer speeds don't seem to have
been filled in yet; they are still the default you get before you've
even submitted a completed task.

The tasks generally take about the same amount of time! But the credit
received for them is much lower -- I have no idea why that is.

I reconnected that VM using the correct project URL (oops) so now it
shows up here:
https://boinc.ibercivis.es/ibercivis/show_host_detail.php?hostid=4223

I'll leave it going for a bit to compare some more.

Tim.
*/


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Re: [Dorset] New BOINC project that does computing for COVID-19

[Tim Waugh]

On Thu, 14 May 2020 at 07:22, Terry Coles  wrote:

> However, there is a new posting on the Ibercivis Message Board that says
> they
> now have a new version of the app on the server which is supposed to fix
> the
> checkpointing problem (but not the computation issue).
>

Ah, yes:
https://boinc.ibercivis.es/ibercivis/forum_thread.php?id=49#289

Thanks for the tip! I'll let these VM tasks drain until I see v0.02 tasks
come in. Still curious about how the VM tasks actually perform in KVM.

Tim.
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Re: [Dorset] New BOINC project that does computing for COVID-19

[Tim Waugh]

I gave up on using hibernate ('systemctl hibernate') only because the FAH
GPU task doesn't survive it.

I noticed that ibercivis released a whole load of new tasks. Still no
checkpointing, and some of them take much longer now, 8-9 hours for me.

That's a lot to lose to lack of checkpointing, so I'm going back to the VM
approach and will see how it really performs (as opposed to its
ahead-of-time estimate).

Tim.
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Re: [Dorset] New BOINC project that does computing for COVID-19

[Tim Waugh]

On Tue, 5 May 2020 at 17:11, Terry Coles  wrote:

> On Tuesday, 5 May 2020 16:56:40 BST Tim Waugh wrote:
> > On Tue, 5 May 2020 at 16:53, Terry Coles 
> wrote:
> > > It still needs the mains to be on.
> >
> > For *hibernate*, i.e. suspend-to-disk?
>
> No.  For Suspend.  Hibernate is only available for laptops it seems.
>

Hibernate is not only for laptops.

If you hibernate (i.e. suspend-to-disk), then you can remove the power with
impunity. When you power it back on it will resume from disk.

Tim.
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Re: [Dorset] New BOINC project that does computing for COVID-19

[Tim Waugh]

On Tue, 5 May 2020 at 14:43, Terry Coles  wrote:

> On Tuesday, 5 May 2020 14:28:35 BST Tim Waugh wrote:
> > Or alternatively, can suspend (or hibernate) be pressed into service?
> > Instead of shutting down at night, suspend/hibernate the machine
> overnight
> > so it can pick up where it left off when it is resumed in the morning.
>
> It looks as if Kubuntu only allows Suspend to RAM for Desktop PCs.
> Hibernate
> is only available if the computer is fitted with a battery.
>

I'd be surprised if it's that way round. Suspend to RAM needs a battery;
hiberate does not (the machine actually powers off completely).

Tim.
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Re: [Dorset] New BOINC project that does computing for COVID-19

[Tim Waugh]

On Tue, 5 May 2020 at 11:05, Terry Coles  wrote:

> On Tuesday, 5 May 2020 11:02:01 BST Tim Waugh wrote:
> > Ibercivis may not have checkpointing, but what if I run it in a VM (using
> > kvm), and suspend *that* when I switch the machine off?
>
> The Client might get a bit confused with the timestamps maybe.  The only
> way
> to find out is to try it I guess.
>

Or alternatively, can suspend (or hibernate) be pressed into service?
Instead of shutting down at night, suspend/hibernate the machine overnight
so it can pick up where it left off when it is resumed in the morning.

Tim.
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Re: [Dorset] New BOINC project that does computing for COVID-19

[Tim Waugh]

Ibercivis may not have checkpointing, but what if I run it in a VM (using
kvm), and suspend *that* when I switch the machine off?

Tim.
*/

On Tue, 5 May 2020 at 10:47, Terry Coles  wrote:

> On Tuesday, 5 May 2020 10:43:53 BST Hamish McIntyre-Bhatty wrote:
> > I'll have to abort on one machine too, it doesn't complete tasks quickly
> > enough for that to work.
>
> I've posted a comment on the Ibercivis forum, requesting that the
> developers
> let us know (by publishing a Notice perhaps), when this problem is
> resolved.
>
>
> --
>
>
>
> Terry Coles
>
>
>
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Re: [Dorset] New BOINC project that does computing for COVID-19

[Tim Waugh]

There are several things at play I think:
- ibercivis has not implemented checkpointing yet, which means if you
switch the computer off all running tasks lose their progress(!)
- the percentage-completion report seems to be a guess: I see it go up in
10% increments, and sometimes tasks complete earlier than the
remaining-time indicated
- some tasks appear to restart once they get to 50%, but this is expected:
   https://boinc.ibercivis.es/ibercivis/forum_thread.php?id=7=180#180

Tim.
*/


On Mon, 4 May 2020 at 14:04, Terry Coles  wrote:

> On Sunday, 3 May 2020 14:59:02 BST Terry Coles wrote:
> > I just got seven Tasks.  They are currently shown as 'Ready to Start',
> > presumably waiting until some of the Rosetta Tasks are complete.
>
> This project is weird!
>
> Yesterday when the Tasks started, the estimated remaining time for each
> was
> about four hours.  They then ran all afternoon without seeming to make
> much
> progress.
>
> This morning they were all showing 3hrs and 55 minutes to run, but the
> elapsed
> time had dropped to 35 minutes.  This morning nothing much seemed to be
> happening, but just now I saw that two Tasks are ready to Report.
>
> As I said weird!
>
> --
>
>
>
> Terry Coles
>
>
>
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Re: [Dorset] New BOINC project that does computing for COVID-19

[Tim Waugh]

I saw some Ibercivis tasks start today.

Thanks for the tip about this project!

Tim.
*/


On Sat, 2 May 2020 at 16:13, Terry Coles  wrote:

> On Saturday, 2 May 2020 16:07:17 BST Hamish McIntyre-Bhatty wrote:
> > Unfortunately no. I guess they're having the same problem Rosetta has
> > been having (though I now get a steady stream of tasks from Rosetta).
>
> Rosetta never stopped giving me tasks, although a few days ago, they
> started
> only giving them to me just in time before the last lot were finished.
> When I
> changed over to the SSH page, I got loads - currently six running, two
> waiting
> for memory and seven ready to start.
>
> --
>
>
>
> Terry Coles
>
>
>
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Re: [Dorset] New BOINC project that does computing for COVID-19

[Tim Waugh]

On Wed, 29 Apr 2020 at 10:21, Terry Coles  wrote:

> On Wednesday, 29 April 2020 09:50:22 BST Hamish McIntyre-Bhatty wrote:
> > Just happened across a new project today:
> >
> https://translate.google.com/translate?sl=auto=en=https%3A%2F%2Fwww.csi
> > c.es
> %2Fes%2Factualidad-del-csic%2Fel-csic-e-ibercivis-lanzan-un-proyecto-de-
> > ciencia-ciudadana-que-busca-farmacos
>
> That project looks a bit more focused than Rosetta@Home who seem to be
> modelling the virus and its protein binders.  All good work but it bit
> more
> blue sky than Ibercivis which is more about simulating the action of pre-
> existing drugs to find an effective treatment for COVID19.  I see that as
> our
> best hope, especially if it turns out that no effective vaccine is
> possible.
>
> I am now running both projects.
>

Looks interesting. Are you picking up tasks from it? I haven't seen any
yet, just see this in the logs:

30-Apr-2020 09:42:04 [ibercivis] Project has no tasks available

Tim.
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Re: [Dorset] Local food suppliers

[Tim Waugh]

On Thu, 9 Apr 2020 at 10:45,  wrote:

> https://www.milkandmore.co.uk
>

They were closed to new customers, and even to existing customers who had
not placed an order this year, when I looked a week or so ago.

Tim.
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Re: [Dorset] Next Meeting - COVID-19 Situation

[Tim Waugh]

On Mon, 6 Apr 2020 at 11:25, Ralph Corderoy  wrote:

> This should be as simple as
>
> wget -q
> https://github.com/jitsi/jitsi-meet-electron/releases/download/v1.1.1/jitsi-meet-x86_64.AppImage
> chmod +x jitsi-meet-x86_64.AppImage
> ./jitsi-meet-x86_64.AppImage
>
> and then entering ‘dorset-lug’ as the meeting ID.
>

Works here.

So we'll meet tomorrow, the same day as Terry sends out the reminder?

Tim.
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Re: [Dorset] Donating computing power

[Tim Waugh]

The stats.foldingathome.org search doesn't find me, no.

But the web UI gives me this link, which (eventually!) works:
https://stats.foldingathome.org/donor/Tim_Waugh

There are also 3rd party stats e.g.:
https://folding.extremeoverclocking.com/user_summary.php?s==929041

Tim.
*/

On Thu, 2 Apr 2020 at 09:20, Hamish McIntyre-Bhatty 
wrote:

> So it seems that while I'm computing for Folding@Home, I'm not on the
> contributors list. I only care because I want to check that its working.
>
> I imagine this might be because the system's overloaded rather than
> because I'm failing jobs or anything, but are any of you on the list
> (https://stats.foldingathome.org/donors)?
>
> Hamish
>
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Re: [Dorset] Donating computing power

[Tim Waugh]

On Mon, 30 Mar 2020 at 14:51, Patrick Wigmore  wrote:

> I thought I'd told it to abort the current tasks before shutting it
> down, but I've since found they sitll show as "In progress" on my
> Rosetta account.


I'm sitting on some work units for Rosetta@home as well, mostly because I'm
waiting for Folding@home to be idle waiting for work before resuming them.

But fear not: with BOINC tasks a single work unit can be assigned to
multiple clients, and the results are cross-checked.
https://boinc.berkeley.edu/trac/wiki/JobReplication

Tim.
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Re: [Dorset] Donating computing power

[Tim Waugh]

On Sat, 28 Mar 2020 at 10:25, Ralph Corderoy  wrote:

> > Unfortunately, that machine seems to be stuck waiting for the
> > server(s) to let it download anything. I presume they are prioritising
> > higher-specification machines.
>
> Maybe.  One snippet of #dorset says
>
> > folding@home ran out of work for me. I resumed boinc telling it to
> > only work when idle (f@h runs regardless when there's folding to
> > be done)
>
> That's one nice thing about WCG, you can set it to only do the
> project/s you want, but to give you work for any others if they
> don't have any.  I'm not sure if BOINC its self can do that.
>
> I don't use any of them so have no insight.
>

(The 'I resumed boinc' was me)

I've not seen rosetta@home waiting for work units yet so I'm not sure what
would cause it. Although, I'm only running it when folding@home is idle. I
only have a single fairly low powered dual-CPU (Turion) machine spare to
use, which I notice comes very far down this list:
https://boinc.bakerlab.org/rosetta/cpu_list.php

Nice article here, folding@home the main focus, which mentions back-offs
when requesting new work:
https://www.extremetech.com/computing/308332-foldinghome-crushes-exascale-barrier-now-faster-than-dozens-of-supercomputers

The Folding@home project definitely seems better at publicity. :-)

Also WCG is World Community Grid, not currently researching COVID-19
specifically:
https://www.worldcommunitygrid.org/research/viewAllProjects.do

Tim.
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Re: [Dorset] Donating computing power

[Tim Waugh]

On Wed, 25 Mar 2020 at 10:53, Terry Coles  wrote:

> dependency issues
>

(Oh yeah, this is another advantage of containers, in that the dependencies
all come with it...)


> I then decided that life was too short and installed  boinc from the
> package
> manager.  This is now running and the current task is expected to take 5
> hours.  All four cores (8 threads) are shown as running at 100% in
> KSysGuard;
> that might put my  son off running this.  Apart from that I am running the
> Rosetta@Home Biology task and according to the BOINC site they have been
> focusing on coronavirus since the 6th March.
>

Do you have the boinc-manager installed? There is a graphical interface,
where you can find Options → Computing preferences with inputs like:

Use at most [ 100 ] % of the CPUs
Use at most [ 100 ] % of CPU time
[x] Suspend when computer is on batter
[ ] Suspend when computer is in use

Further down there is also:

Request tasks to checkpoint at most every [ 60 ] seconds

which answers your question about how much work might be lost when
switching off.

Tim.
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Re: [Dorset] Donating computing power

[Tim Waugh]

On Wed, 25 Mar 2020 at 10:07, PeterMerchant 
wrote:

> I would like to help, but my computer is not very powerful
> -Computer-
> Processor: Intel(R) Pentium(R) CPU G3420 @ 3.20GHz
>

I don't think that's necessarily a huge drawback. The overall computing
power comes from numbers of CPUs/GPUs as well as individual processing
power. My system is dual core but each CPU is slower than that (2.2GHz).


> The usual questions: which of these two methods uses the least
> power/resources?
>

Not sure which two methods you might mean:
* bare vs container
  - No difference. Containers are not virtualized, they run directly on the
CPU. Probably not work bothering with containers for this unless you're
already used to them (or fancy playing).

* BOINC vs folding@home
  - I think either can use as much idle CPU as you want to give it. For
folding@home there is a slider on the web interface for power:
'light-medium-full', and also defaults to doing work only when the computer
isn't otherwise in use.

Tim.
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Re: [Dorset] Donating computing power

[Tim Waugh]

On Wed, 25 Mar 2020 at 09:56, Terry Coles  wrote:

> > It's all fine, they're built to be pretty resilient to that sort of
> thing.
> > I do see the completion ETA fluctuate wildly after switch-on, but really
> I
> > should stop staring at the stats and get on with work anyway :-)
>
> Thanks.
>

Actually on the subject of stats for folding@home specifically, I found
this site has better information that the one you get from the link in the
web interface:

https://folding.extremeoverclocking.com/user_summary.php?s==929041

Tim.
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Re: [Dorset] Donating computing power

[Tim Waugh]

On Wed, 25 Mar 2020 at 09:56, Terry Coles  wrote:

> For simplicity I think I'll do it bare, especially since I'd have to work
> out
> how to containerise the software on two Windows machines as well as this
> desktop.
>

Yes, I imagine that's how the majority of people install it.

Set it to support research fighting 'Any disease' -- they are prioritising
the SARS-CoV-2 work units.

\o/

Tim.
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Re: [Dorset] Donating computing power

[Tim Waugh]

On Wed, 25 Mar 2020 at 08:48, Terry Coles  wrote:

> However, only one of these machines could possibly be run 24/7 and
> unfortunately that's the ancient laptop.


I only run mine for about 15-16 hours a day.


> What  happens to the calculations with these tools if the host is
> shut-down for the
> night?  Is everything lost, only the current calculation lost or do they
> cache
> the partial result and carry on from there?
>

It's all fine, they're built to be pretty resilient to that sort of thing.
I do see the completion ETA fluctuate wildly after switch-on, but really I
should stop staring at the stats and get on with work anyway :-)


> BTW.  What are the benefits of running these tools in a container as
> opposed to
> just installing them?
>

Just convenience really. I don't like to install anything 'bare' on the
system and much prefer everything to be containerized, so that I know
exactly what's on it and can recreate it if needed. Speaking of which...

Anyone who is not an ansible geek like me can stop reading here. :-)

FWIW I used this ansible snippet to make the container itself:

---
- name: folding@home client is running
  docker_container:
recreate: true
image: "{{ folding_image_name }}"
name: fahclient
state: started
published_ports: 7396:7396
volumes:
  - "{{ folding_mnt }}:/tmp:Z"
restart_policy: always
  tags: [foldingathome]

Here, folding_image_name is quay.io/redhat-emea-ssa-team/fahclient-container
and folding_mnt is the mount-point on the logical volume I made for it to
store whatever it needs (not strictly necessary, I just like to know what's
stored where).

Tim.
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[Dorset] Some links

[Tim Waugh]

Hi,

Some links about topics we discussed last night:

* d-feet for snooping on D-Bus messages, either for debugging your own
stuff or working out how mysterious pop-up messages work
  https://wiki.gnome.org/Apps/DFeet

* static analysis tools for python
  Flake8: http://flake8.pycqa.org/en/latest/
  LGTM (charged service, but free for open source): https://lgtm.com/

* Headless encrypted boot using LUKS, systemd, and USB stick
  http://cyberelk.net/tim/2015/04/09/headless-encrypted-boot-with-fedora-server/

Tim.
*/


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Re: [Dorset] Date of Next Meeting.

[Tim Waugh]

Ooh, I might not be able to make the 12th either, or the 18th or 19th, or
21st. I'm awkward this month, maybe best to schedule without me.

Tim.
*/


On Wed, 2 Oct 2019 at 12:10, Ralph Corderoy  wrote:

> Hi,
>
> Tim W. wrote:
> > Nice catch. I'll be doing Bonfire Night things that night.
>
> Anyone object to Tuesday 12th instead?
>
> $ cal nov
> November 2019
> Mo Tu We Th Fr Sa Su
>  1  2  3
>  4  5  6  7  8  9 10
> 11 12 13 14 15 16 17
> 18 19 20 21 22 23 24
> 25 26 27 28 29 30
>
> $
>
> --
> Cheers, Ralph.
>
> --
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Re: [Dorset] Date of Next Meeting.

[Tim Waugh]

On Wed, 2 Oct 2019 at 11:31, Ralph Corderoy  wrote:

> The first Tuesday next month is the 5th; Bonfire Night.
> Would any of the regulars prefer it moved?  I've looked at
> https://www.facebook.com/pg/bournemouthelectricclub/events/ and there's
> nothing listed there that might clash, though I don't know if it's
> complete.
>

Nice catch. I'll be doing Bonfire Night things that night.

Tim.
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Re: [Dorset] Links from 2019-09-03's Pub Meet.

[Tim Waugh]

Also, here is the excellent talk I mentioned about data visualization, from
this year's PyCon:
https://www.youtube.com/watch?v=vTingdk_pVM

Tim.
*/



On Wed, 4 Sep 2019 at 11:35, Ralph Corderoy  wrote:

> Hi,
>
> I found out at the end that the serious pool game that was still going
> on was the last of ten games between the club's team and away visitors
> in a league.  It was 5-4 going into it.
>
> ‘...first home(garage)made lithographically-fabricated integrated
> circuit – the “Z1” PMOS dual differential amplifier chip’
> ― http://sam.zeloof.xyz/first-ic/
>
> Review of using the Raspberry Pi 4 as a desktop computer.
> https://www.raspberrypi.org/magpi-issues/MagPi85.pdf
>
> ‘The OODA loop is the cycle observe–orient–decide–act, developed by
> military strategist and United States Air Force Colonel John Boyd...
> Boyd inspired the Lightweight Fighter program...’
> ― https://en.wikipedia.org/wiki/OODA_loop
>
> D-Notices are advisory and do get ignored.
> https://en.wikipedia.org/wiki/D_notice#United_Kingdom
>
> --
> Cheers, Ralph.
>
> --
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Re: [Dorset] ed, vi et al

[Tim Waugh]

On Fri, 5 Jul 2019 at 08:07, Ralph Corderoy  wrote:

> Here's me entering Ctrl-1, Ctrl-2, ... up to Ctrl-0 and then Enter.
>
> $ stty raw; \
> > ((timeout --foreground 4.2 dd bs=1; stty cooked; echo >&3) | hd) 3>&1
> 1^@^[^\^]^^^_^?9^M
>   31 00 1b 1c 1d 1e 1f 7f  39 0d
> |1...9.|
> 000a
> $
>
> You can see the TTY's ‘ctlecho’ setting causing Ctrl-2 to be echoed as
> ‘^@’, NUL, and that's confirmed by the hex dump.  0x1c is backslash,
> 0x5c, with Ctrl masking off 0x40.
>

I had no idea about those. It's a minefield!

Tim.
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Re: [Dorset] ed, vi et al

[Tim Waugh]

On Thu, 4 Jul 2019 at 15:16, Ralph Corderoy  wrote:

> That CP/M manual also has a list of control characters, page 20 of 26.
> Ctrl-L and Ctrl-Z I understand.  Ctrl-C is ‘system reboot’.  Seems a bit
> severe.  At least the Break key was out on a corner on the BBC Micro,
> Sun's keyboards, etc.
>

Yes... the same place the Commodore 64 put backspace. My muscle memory
sometimes hit Break when I just wanted to correct a typo.

I sometimes think the same about the default tty signal mapping of Ctrl-\
for SIGQUIT -- the two keys appear next to either other on this keyboard,
so is easy for e.g. a cat to type (or even a mis-typed Ctrl-Z undo attempt).

Tim.
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Re: [Dorset] Links from 2019-07-02's Pub Meet.

[Tim Waugh]

On Wed, 3 Jul 2019 at 09:07, PeterMerchant via dorset <
dorset@mailman.lug.org.uk> wrote:

> There was some discussion about 'CEPH?' and similar things.
>

Yes, thinking around the problem of wanting to seamlessly use more storage
than is available locally on e.g. a laptop, backed by network storage
(perhaps a local file server, perhaps as a cache for cloud storage).

https://ceph.com/ceph-storage/
https://www.gluster.org/
https://perkeep.org/

Tim.
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Re: [Dorset] Next Meeting - One Week Tonight

[Tim Waugh]

I won't be able to come this time I'm afraid.

Tim.
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Re: [Dorset] Python - Finding the Minimum Value and its Position in an Array

[Tim Waugh]

Does v.index(min(v)) do what you want?

Tim.
*/


On Wed, 23 Jan 2019 at 13:21, Terry Coles  wrote:

> Hi,
>
> I have a series of measured voltages which are currently being written to
> a
> Python List.  As apart of the processing of these numbers, I need to
> calculate
> the average value, the minimum value and the element position of the
> minimum
> value in the List.
>
> For example, I have got:
>
> Vmeas = [3.125,3.122,3.112,3.126]
>
> Using plain old Python, I can calculate the mean and find the minimum
> value,
> but apparently I need to use numpy to find which element contains that
> minimum
> value.  I found this page:
>
>
> https://www.science-emergence.com/Articles/Find-nearest-value-and-the-index-in-array-with-python-and-numpy/
>
> but it doesn't give me the correct element when I run the exact code for a
> 1D
> array from that site, either in a Python shell as indicated there or as
> part
> of my program .  I just get any old value.
>
> Can anyone help?
>
> --
>
>
>
> Terry Coles
>
>
>
> --
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Re: [Dorset] Links from 2018-11-06's Pub Meet.

[Tim Waugh]

On Thu, 8 Nov 2018 at 08:51, C Wills  wrote:

> I did not know you could 'slide' a partition, it worked well (thanks Tim).
>

I think I said I thought gparted couldn't do it, based on my (outdated)
knowledge of parted. But hey, I'll take it!

Tim.
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Re: [Dorset] Centering Text Using CSS

[Tim Waugh]

Another thing you might find useful is Firefox's 'Inspect Element (Q)' mode
(right-click on the page to find that). You can highlight elements and
inspect (and modify) their dynamic CSS properties. Especially useful for
finding things like e.g. the element's width doesn't fill its parent the
way you thought it did.

Tim.
*/


On Thu, 12 Jul 2018 at 14:03, Terry Coles  wrote:

> On Thursday, 12 July 2018 13:57:28 BST Andrew wrote:
> > HTML can be validated automatically, which really helps with learning.
>
> I'd forgotten about that
>
> >
> https://validator.w3.org/nu/?doc=http%3A%2F%2Fwww.hadrian-way.co.uk%2FWMT_We
> > bserver%2FWMT%2F
>
> Coo.  What a lot of errors, especially since much of the code was gleaned
> from
> (admittedly uncertain) online tutorials and examples.
>
> Now I know what I'll be doing for the next few days :-)
>
> --
>
>
>
> Terry Coles
>
>
>
> --
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Re: [Dorset] LUG Meets World Cup.

[Tim Waugh]

On Tue, 26 Jun 2018 at 17:25, Terry Coles  wrote:

> 2. Postpone this months meeting until after the Football is finished (the
> Final is on the 15th).
>

I vote for 2, especially because I can't make the original date.

For this option, are we saying it would be Tuesday 17th July or is that not
decided?

Tim.
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Re: [Dorset] Links from 2018-05-01's Pub Meet.

[Tim Waugh]

On 3 May 2018 at 07:37, Keith Edmunds  wrote:

> For password management, you could keep it Open Source with Bitwarden.
> Runs on Window, Mac, Linux; apps for iPhone and Android; browser plugins
> for Chrome, Firefox, Opera, Edge, Safari and even the Tor Browser.
>
> https://bitwarden.com/
>

Wasn't aware of this one. Nice tip!

Tim.
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Re: [Dorset] Links from 2018-05-01's Pub Meet.

[Tim Waugh]

I mentioned LastPass, yes.

Not mentioned, because I forgot to: 'Pass: The Standard Unix Password
Manager' at https://www.passwordstore.org/

Tim.
*/


On 2 May 2018 at 19:27, PeterMerchant via dorset 
wrote:

> On 02/05/18 12:12, PeterMerchant via dorset wrote:
>
>> and Keepass https://keepass.info/
>>
>> P.
>>
>>
>>
>> Sorry, That is Not it. I was looking to install it and found both keepass
> and keypass, But I think the one that we discussed was lastpass?
>
> Am I correct?
>
> P.
>
>
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Re: [Dorset] Using polkit to escalate privieges

[Tim Waugh]

That's exactly the idea. :-)

Tim.
*/


On 19 March 2018 at 11:37, Hamish MB <hamis...@live.co.uk> wrote:
> Thanks Tim.
>
> Right, so I should be able to make a script to run processes as root,
> and then make a polkit action for that script, so the dialogs are nicely
> presented, rather than displaying script names and things like that. Is
> that a hack/bad idea or does it sound okay? I'm sure there must be a
> nicer way of doing this...
>
> Hamish
>
>
> On 16/03/18 14:24, Tim Waugh wrote:
>> On 16 March 2018 at 14:05, Hamish MB <hamis...@live.co.uk> wrote:
>>> I see, I think. In that case it sounds like the wrong tool for what I'm 
>>> trying to do, though I'm sure that for example synaptic uses it. I'm 
>>> thinking specifically of using pkexec, does that work this way too?
>> Yes, pkexec just uses the org.freedesktop.policykit.exec action. See
>> pkaction(1) for a list of other actions installed.
>>
>> Tim.
>> */
>
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Re: [Dorset] Using polkit to escalate privieges

[Tim Waugh]

On 16 March 2018 at 14:05, Hamish MB  wrote:
> I see, I think. In that case it sounds like the wrong tool for what I'm 
> trying to do, though I'm sure that for example synaptic uses it. I'm thinking 
> specifically of using pkexec, does that work this way too?

Yes, pkexec just uses the org.freedesktop.policykit.exec action. See
pkaction(1) for a list of other actions installed.

Tim.
*/

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Re: [Dorset] More links

[Tim Waugh]

On 13 March 2018 at 12:28, Ralph Corderoy  wrote:
> Hi Tim,
>
>> http://pubs.opengroup.org/onlinepubs/009695399/utilities/ls.html says:
>
> http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ls.html is the
> current version.  :-)

Yes, indeed, I should have checked that. :)

> It's also handy with these questions to ask `What would 7th Ed. do?'.
> :-)

!!

Tim.
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Re: [Dorset] Using polkit to escalate privieges

[Tim Waugh]

The way polkit works is that you have a privileged executable with a
well-known D-Bus object name, a defined D-Bus interface to it, and an
unprivileged executable which asks the system D-Bus for the object
with the interface.

The interface can be as fine-grained as you like. But you definitely
want to put all the privileged parts behind the interface (i.e.
implementations of the interface methods), and the unprivileged parts
in "front" of it (i.e. calling the interface methods).

Tim.
*/


On 15 March 2018 at 20:16, Ralph Corderoy  wrote:
> Hi Hamish,
>
>> One of the things I need to get to reasonably soon is sorting out
>> using polkit to escalate privileges rather than running my GUI
>> programs as root.
> ...
>> Would it be a better idea to make separate scripts for privileged
>> actions and polkit rules for them?
>
> What's the GUI doing that needs root privileges?  I assume this is on
> Raspbian on a Pi?  Access to GPIO or something else?
>
> Cheers, Ralph.
>
> --
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[Dorset] More links

[Tim Waugh]

Hi,

Some links from things I jotted down from last week:

ls -d
-

http://pubs.opengroup.org/onlinepubs/009695399/utilities/ls.html says:
"If no operands are specified, ls shall write the contents of the
current directory."
and then:
"-d  [...] Do not treat directories differently than other types of
files. [...]"

So it makes sense that 'ls -d .' would output '.', from the
description of -d above.

It also makes sense that 'ls' can be implemented as being equivalent
to 'ls .' from the 'no operands' description above.

Does this mean that 'ls -d' _must_ output '.', or is it free to be
equivalent to 'ls -d *'?

Event Notify Test Runner
---

Probably  mentioned before.

entr (http://entrproject.org/) reads filenames from standard input,
then watches those files for changes and runs a specified command each
time a change is seen.

Example:
ls *.pdf | entr pkill -HUP mupdf

...to tell mupdf to reload the PDF file it is displaying, each time
one of the PDFs in the current directory is regenerated.

polkit
--

polkit (https://www.freedesktop.org/wiki/Software/polkit/) allows
unprivileged processes to ask for privileged processes to carry out
specific actions, and uses PAM to decide whether to allow this. It's
what allows the 'Unlock' button seen in many config applications (e.g.
GNOME Settings) to work.

Star Wars in ASCII art
--

telnet towel.blinkenlights.nl

Mistyping
-

The 'sl' command: https://github.com/mtoyoda/sl

although I see a helpful suggestion instead thanks to
PackageKit-command-not-found:

$ sl
bash: sl: command not found...
Similar command is: 'ls'
$

Tim.
*/

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Re: [Dorset] Last Night's Meeting

[Tim Waugh]

On 7 June 2017 at 11:49, Ralph Corderoy  wrote:
> Python's interpreter's `>>>' prompt is an example of a REPL.
> https://en.wikipedia.org/wiki/Read%E2%80%93eval%E2%80%93print_loop
> Perl's is its debugger's:  perl -de1

We talked a little about Python's debugger, pdb, and its
short-comings. Turns out that it *does* have a "display" command to
show the value of an expression each time it stops, but only since
Python 3.2:
https://docs.python.org/3/library/pdb.html#pdbcommand-display

Tim.
*/

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Re: [Dorset] Bournemouth Pub Meeting Tonight, Tuesday 2017-03-07.

[Tim Waugh]

On Wed, 2017-03-08 at 11:50 +, PeterMerchant via dorset wrote:
> A couple of things about what I was discussing:
> Family History/genealogy
> The only program designed for Linux for managing the data is one
> called gramps.

There's also a web application, www.webtrees.net. It's what became of
phpGedView.

Tim.
*/


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Re: [Dorset] Chris Smithies

[Tim Waugh]

On Sat, 2016-12-31 at 07:54 +, Terry Coles wrote:
> He will be sadly missed by everyone who knew him.

Most definitely. I will miss the way he would enthusiastically explain
some detail that amused him, whether it was about (natural) languages,
programming languages, music, or anything.

Please do pass on my condolences.

Tim.
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Re: [Dorset] Bournemouth Pub Meeting Tonight, Tuesday 2016-08-02.

[Tim Waugh]

I won't be able to make it this month I'm afraid.

Tim.
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Re: [Dorset] Spare S-Video cable?

[Tim Waugh]

...and now I've been spared wasting time on that particular experiment
by being informed that S-Video does not carry audio.

So keep your spare S-Video cables at home.

Tim.
*/


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[Dorset] Spare S-Video cable?

[Tim Waugh]

I'm trying to do some video capturing using video4linux with a cheap
capture device using the usbtv driver and some composite video cables.

All is well except for sound, which is just a click every second.

My idea is that maybe using S-Video instead of composite video would
help, but I don't have a cable handy.

Does anyone planning on meeting up tomorrow have a M-M S-Video cable
they're not using?

Thanks,
Tim.
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Re: [Dorset] Next Meeting - One Week Tonight

[Tim Waugh]

I won't be able to make it to this one I'm afraid.

Tim.
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Re: [Dorset] Using GitHub

[Tim Waugh]

On Mon, 2015-09-07 at 14:25 +0100, Terry Coles wrote:
> A visit to the web page at https://github.com/samaaron/sonic-pi/
> implies that I need to sign up to access the code, so how do I do 
> that from the command line?

No, you don't need to sign up.

On the right-hand side of that page, should see "You can clone with
HTTPS, SSH, or Subversion" below a box with a URI in it. It should
already be labelled "HTTPS clone URL", in which case that's the one you
want.

If not, click on the 'HTTPS' link below the box, and it will show you
the right one.

When you click in that box it will highlight the entire URL ready for
you to copy and paste.

Tim.
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Re: [Dorset] Meeting yesterday

[Tim Waugh]

On Wed, 2015-07-08 at 12:00 +0100, Terry Coles wrote:
 We then get into a long discussion about robotics and AI.  We weren't
 really looking at the techniques; rather debating the implications of 
 where it was all going, (think 'I, Robot', Azimov's three laws and 
 the dangers of robots that can think for themselves).

If you haven't managed to catch it, Humans is done pretty well, 9pm
Sundays on 4.

http://www.channel4.com/programmes/humans

Tim.
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Re: [Dorset] Meeting Tonight at the Broadway

[Tim Waugh]

On Fri, 2015-06-05 at 17:02 +0100, Natalie Hooper wrote:
 Indeed, I am currently on maternity leave so I am back living full
 time in Bournemouth.

Hey, congratulations Natalie!

On Wed, 2015-06-03 at 09:32 +0100, Terry Coles wrote:
 Is this just happenstance or do we need to consider a new venue
 again?

I was away last week so unable to come. The Broadway is fine for me,
location-wise.

On Sat, 2015-06-06 at 17:44 +0100, Victor Churchill wrote:
 I'm kind of in the opposite situation - I suggested the Broadway back
 when we were having trouble getting enough people to The King's Arms
 or the Moon In The Square, because it's good for buses and - just 
 coincidentally - I could walk back home up Broadway Lane ! :-)

I'd also be happy with the Moon. I already walk past it to catch the
bus to the Broadway.

Tim.
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Re: [Dorset] Am I missing something obvious in gnome-boxes

[Tim Waugh]

On Fri, 2015-02-06 at 11:01 +, Terry Coles wrote:
 I don't have the original Windows ISO at the moment, so I thought I'd try 
 grabbing 
 the Fedora 21 ISO off the latest Linux Format DVD.  That seemed to work, but 
 then 
 I just got a grey screen, when I tried to launch it.  I was never asked to go 
 though 
 the Installation process, so presumably, Boxes has laid down the CD image 
 without 
 try to boot into it.

Did you choose the 'Install to Hard Drive' option when the ISO booted?
After clicking 'Create' on the Create a Box page, you should see the
'Starting Fedora Live in ..' boot screen followed shortly afterwards by
a graphical 'Welcome to Fedora' screen showing a choice: 'Try Fedora' |
'Install to Hard Drive'.

Tim.
*/



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Re: [Dorset] Linux project volunteering

[Tim Waugh]

On Tue, 2014-12-16 at 23:15 +, Nicky Scopes wrote:
  hello all, does anyone know of any Linux projects I could volunteer
 for I am trying to get some experience it doesn't necessarily have to
 be in this country. I looked at gnu.org but found they need for people
 to attend meetings or do legal stuff I need a bit more hands on, e.g.
 Linux system administration or even writing howto's or man pages for
 example.

What sort of experience are you after?

For technical writing, there are any number of free software projects
that are badly in need of good documentation or even 'what is this
anyway?'-type introductions.

Similarly for writing code: any project that's set up for collaboration
(i.e. most you will find) will have a bug list that's usually got some
low-hanging fruit in to get started with.

As for system administration, the way most of us got experience with
that was treating our home computers as mission critical servers :-)

The main thing when it comes to finding something to help out with is:
what sorts of things are you interested in? What sorts of things do you
use, even? Find out where those things come from, and see if anything
needs doing.

Tim.
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Re: [Dorset] Borrow a floppy disk drive

[Tim Waugh]

On Tue, 2014-08-05 at 00:30 +0100, Victor Churchill wrote:

 Got it, Tim;  internal quick release from a Dell tower box. Planning
 tocome to Broadway tomorrow - Do you need cables too?

No, I have cables (and a Dell tower, yay!).

Thanks,
Tim.
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Re: [Dorset] Borrow a floppy disk drive

[Tim Waugh]

On Tue, 2014-07-29 at 14:31 +0100, Chad Cumberland wrote:
 I have a old usb one you can borrow.

Thanks for all the offers.

Chad, are you planning on coming to the meeting tomorrow? If not,
Victor, maybe you are?

A USB drive is probably best for me, or otherwise an internal drive is
fine.

Trying to avoid having everyone turn up with floppy drives, or else we
really *will* be trying to do the Imperial March!

Thanks,
Tim.
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[Dorset] Borrow a floppy disk drive

[Tim Waugh]

Hello!

Does anyone have a floppy disk drive I could borrow? I finally get
around to investigating some old floppy disks of mine only to realise it
must have been years ago that I got rid of the last disk drive I had!

Thanks,
Tim.
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Re: [Dorset] Borrow a floppy disk drive

[Tim Waugh]

On Tue, 2014-07-29 at 15:37 +0100, Paul Stenning wrote:
 I think I have an internal 3.5 1.44MB one here (Bournemouth).  I'll 
 need to check to be certain but if that's what you want you are welcome 
 to it as I have no further use for it.  I should have a ribbon cable for 
 it too.

Thanks for the offer -- that's the sort of thing I'm after. If you
happen to come along to Jelly tomorrow and the drive is easy to get at
before-hand, it would be great if you could bring it along... :-) 

There's no hurry for it though, so no problem if not.

Tim.
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Re: [Dorset] Borrow a floppy disk drive

[Tim Waugh]

On Tue, 2014-07-29 at 15:23 +0100, TimA wrote:
 Just to add to the offers, I have an internal 5.25 if that's what 
 you're after.

I never even thought to specify, but it's 3.5 that I need. Wow, does
the 5.25 one still work?

Tim.
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Re: [Dorset] Borrow a floppy disk drive

[Tim Waugh]

On Tue, 2014-07-29 at 15:18 +0100, Ralph Corderoy wrote:
 If you have non-DOS-format floppies then USB probably won't be any good.
 In their wisdom, they made the USB interface only support normal DOS
 formats;  no 1024-byte sectors, 10 sectors per track of ADFS, for
 example.

One of them is labelled 'Minix' so might be ext or something, but the
others will be DOS format. I wondered about external USB floppy drives,
whether it's a standard thing or would need a special driver on Linux.

Tim.
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Re: [Dorset] Bournemouth Pub Meeting Tonight, Tuesday 2014-07-01.

[Tim Waugh]

Sorry, won't be able to make it this month.

Tim.
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[Dorset] Some git pointers

[Tim Waugh]

For the benefit of Chad and Charles, and anyone else:

* Git PS1 decoration:

Git comes with some nice command line decoration, which you can activate
by putting this definition in .bashrc and running git-prompt in new
shells:

git-prompt() {
  git_prompt_dir=/usr/share/git-core/contrib/completion
  git_integration=$git_prompt_dir/git-prompt.sh
  test -e $git_integration || 
git_integration=$git_prompt_dir/git-completion.bash
  if test -e $git_integration; then
source $git_integration
export PS1='[\u@\h \W$(__git_ps1  (%s))]\$ '
export GIT_PS1_SHOWDIRTYSTATE=1
export GIT_PS1_SHOWUNTRACKEDFILES=1
  fi
}

(the location and name of the file was changed, hence the test)

This decorations your prompt (PS1) so that it contains the branch name
and state in parentheses. State characters are:

* unstaged changes
+ staged changes
$ stashed changes
% untracked files

You can also set GIT_PS1_SHOWUPSTREAM=auto if you'd like these:

 you are behind upstream
 you are ahead of upstream
 diverged
= at upstream head

* Git command line completion

Fedora's git package comes with a file in /etc/bash_completion.d/ so
that command line completion is automatic -- I'm not sure if this is
straight from the tarball or not.

Branch names and tags will auto-complete; so will options and of course
filenames when appropriate.

* Terminal-mode history viewer

Use 'tig' to see a nice navigable view of the project history.

Use 'tig blame file' to see a navigable version of 'git blame file'. As
well as showing the entire file with each line annotated to describe the
last commit that changed it, pressing Enter on any line will show you
that commit message and the changes it introduced. Obviously, '/' will
search forward etc.

* Finally, the killer feature: bisect

Run 'git help bisect' to find out more about git's killer feature.
Operating entirely off-line, you tell git:

* the last-known-good version of the project,
* the version that is known to be broken, and
* a test script to check for the breakage

and it will perform a binary search to narrow down the exact commit that
broke it.

Tim.
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Re: [Dorset] Consolidating files

[Tim Waugh]

On Mon, 2014-01-13 at 12:41 +, Peter Merchant wrote:
 Hi, I have a problem. My backup USB drive is full. It has full copies of 
 all my data and in some cases my whole home directory from every time 
 that I have backed up. What I would like to do is consolidate  by adding 
 all files that are in the old 2013-upstairs-August directory to the 
 2013-upstairs-December that are not already there - the ones that have 
 been deleted between backups. Is there an easy way to do this?

Look at cp's -u option -- I think that's what you want.

 For the future, is there an easy way to do incremental backups of my 
 Home directory?

I would recommend either:

1. deja-dup, which uses duplicity underneath. This is a proper
incremental backup solution that has the advantage of nice desktop
integration: nautilus has context menu items for
restore/revert-to-older, and if backups are stored on an external disk
the backup starts when that disk is connected.
  https://wiki.gnome.org/action/show/Apps/DejaDup

2. backintime, which is conceptually simpler but not as well integrated
or as easy to use. This uses the filesystem's hard link idea quite
well. It stores a snapshot as a directory tree, but hard links identical
files from previous backups to save space.
  http://backintime.le-web.org/

Tim.
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Re: [Dorset] CUPS authentication question

[Tim Waugh]

On Fri, 2013-12-06 at 14:10 +, Tim Allen wrote:
 Here's the relevant sections of cupsd.conf:
 
 DefaultAuthType Basic
 WebInterface Yes
 
 Location /
Order allow,deny
Allow @LOCAL
 /Location
 
 Location /jobs
AuthType Default
Require valid-user
Order allow,deny
Allow @LOCAL
 /Location
 
 Policy default
JobPrivateAccess default
JobPrivateValues default
SubscriptionPrivateAccess default
SubscriptionPrivateValues default
 
 
 Log on to CUPS Jobs web page as user1. All jobs (user1 and any other 
 user) show Name Unknown, User Withheld for each job. This is correct for 
 default JobPrivateValues (from manual, The default values are 
 job-name, job-originating-host-name, and 
 job-originating-user-name.) But incorrect for JobPrivateAccess (should 
 be @OWNER, @SYSTEM). In fact, it doesn't matter what we put for 
 JobPrivateAccess (all, user1, anything else), the result is the same - 
 access is barred.

This works as expected for me: the owning user (user1 in your case) gets
to see their own job metadata, but not anyone else's, on the basis of
their provided 'requesting-user-name' value. In that, that's the default
configuration.

cups-1.7.0-6.fc20.x86_64

FWIW, I don't think the '/jobs' location restriction is sufficient to
password-protect all cases of getting job information. CUPS-Get-Jobs is
performed on the printer URI, for instance, and CUPS-Get-Job-Attributes
can be performed on a printer URI with a 'job-id' attribute provided.
There are also subscriptions to cover.

Tim.
*/



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Re: [Dorset] CUPS authentication question

[Tim Waugh]

On Thu, 2013-12-05 at 21:02 +, Tim Allen wrote:
 Yes, so my understanding is that any job not owned by the authenticated 
 user (who is not a member of lpadmin) should show as withheld, 

No -- the JobPrivateValues attributes would.

But they are none, so JobPrivateAccess has no effect.

Think of it like chmod 755 * -- 755 would be JobPrivateAccess, *
would be JobPrivateValues.

Tim.
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Re: [Dorset] CUPS authentication question

[Tim Waugh]

On Fri, 2013-12-06 at 10:49 +, Tim Allen wrote:
 It looks like JobPrivateAccess is broke (basically ignored) in 1.5, 
 setting JobPrivateValues none at least gets back to pre-1.5 behaviour.

I'm not sure why you think it isn't working. Can you give an example
that doesn't behave as you expect? (I've just re-read all your messages
in this thread, and I don't see one that wasn't explained by my 'chmod'
analogy.)

Tim.
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Re: [Dorset] CUPS authentication question

[Tim Waugh]

On Wed, 2013-12-04 at 09:38 +, Tim Allen wrote:
 Thanks, that's pointed me in the right direction. But the remaining 
 question is, how do I get the Policy authenticated to be triggered? With

Which policy is used is set on a per-queue basis. It's the
printer-op-policy. So to get a particular queue to use the
authenticated policy, do this:

lpadmin -p queue -o printer-op-policy=authenticated

Tim.
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Re: [Dorset] CUPS authentication question

[Tim Waugh]

On Tue, 2013-12-03 at 16:25 +, Tim Allen wrote:
 Hi All
 
 Playing around with CUPS 1.5.3 on Debian Squeeze. 1.5 has a nice feature 
 to hide job details on the web interface via JobPrivateAccess and 
 JobPrivateValues. With the following in cupsd.conf:
 
 # Restrict access to the server...
 Location /
AuthType Default
Require valid-user
Order allow,deny
Allow @LOCAL
 /Location
 
 individual users must log in to the web interface and only see their own 
 job details, but members of SystemGroup can see all job details - nice! 
 However, with the
 
 AuthType Default
 Require valid-user
 
 lines, I can't print from remote machines without getting into further 
 authentication complications. I'm guessing I need to use a different 
 Location  directive that only applies to the jobs pages of the web 
 interface - can anyone advise?

I think you really want a policy modification. That specifies the
authentication requirements based on the operation, not the
location/resource.

Look at the Policy authenticated.../Policy section. I think those
defaults might be what you want. You can set the policy on a per-queue
basis.

Tim.
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Re: [Dorset] Date of Next Meeting; Avoid Guy Fawkes Night?

[Tim Waugh]

On Wed, 2013-10-02 at 11:17 +0100, Ralph Corderoy wrote: 
 First Tuesday in November is the 5th.  Some of us might be busy burning
 parliament.  Shall we slip a week to the 12th?

I can't make either date so I'll abstain. :-(

Tim.
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Re: [Dorset] Last nights meeting and thanks

[Tim Waugh]

On Wed, 2013-06-05 at 09:17 +0100, C A Wills wrote:
 Personally I'd like to thank Ralph and especially Tim for giving me 
 information on finding my network printer which under Mint 14 Cinnamon 
 64 I could not locate and connect.  Thanks Tim, within 10 mins of using 
 your suggestion (System-config-printer) I'd connected and printed test 
 page and it's now the default, thanks.

Glad I was able to help. :-)

Tim.
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Re: [Dorset] Broadway meeting next week: event notification

[Tim Waugh]

On Tue, 2013-06-04 at 10:57 +0100, Ralph Corderoy wrote:
 Anyway, if anyone has a recentish live distro CD/DVD they no
 longer need, he might appreciate it.

I expect I'll be able to rustle up a Fedora live CD for this evening.

Tim.
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Re: [Dorset] Hi from pissed off Windows user in Weymouth - wanting to change

[Tim Waugh]

On Wed, 2013-03-20 at 19:06 +, Terry Coles wrote:
 I'm not sure who you spoke to at HP, but they didn't know much about Linux.  
 As Andrew has already said, Linux uses CUPS, but in addition, HP provide a 
 Linux add-in called 'HPLIP' 
 (http://hplipopensource.com/hplip-web/index.html).  
 However, you DON'T need to download it from that site; I just provided that 
 for reference.  Nearly all modern Distros include HPLIP in their 
 repositories, 
 so once you've got your installation up and running, go to the Package 
 Manager 
 and search for HPLIP.  The rest is achieved with a few clicks and an entry of 
 your password.

As a matter of fact, the Fedora distribution goes one better than this:
the recommended way to install the correct available printer driver is:

1. Plug in the printer and follow the instructions

If a printer driver is available (as part of the distribution), you will
be prompted to install it, and a queue for the printer will be created
automatically.

Tim.
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Re: [Dorset] Links from 2012-08-07's Pub Meeting.

[Tim Waugh]

On Sat, 2012-08-11 at 16:35 +0100, Ralph Corderoy wrote:
 Does my `Unguessable123' password exist anywhere on the disk?  May throw
 up false positives by design to avoid the act of searching from creating
 what's being searched for.  LC_ALL=C grep -boa 'Un..bl...3' /dev/sda

I tend to put a letter in its own bracket expression to avoid the search
itself showing up as a result.  e.g.

ps axf | grep '[f]irefox'

But for a password... yes, using . is probably a better idea :-)

 Tim's method of counting from 0 to 99 on your fingers;  didn't catch the
 name.  Index to little finger is 1-4, thumb adds 5, same fingers then
 give 6-9.  Second hand gives tens' column.  I thought of using one hand
 to count units and the other to tally fives as a kid but that leads to
 ambiguity; 5 could be 0,5 or 1,0, it should really be tallying the less
 `natural' sixes.  All tends towards binary of course for the highest
 range with simple in/out of fingers.
 http://en.wikipedia.org/wiki/Finger_counting

This is called Chisenbop.
http://en.wikipedia.org/wiki/Chisanbop

I found it in _Mind Performance Hacks_.
http://shop.oreilly.com/product/9780596101534.do

I use it for keeping score when playing along with TV quizzes at
home. :-)

Tim.
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Re: [Dorset] June's Pub Meeting and the HM's Jubilee.

[Tim Waugh]

On Sat, 2012-05-05 at 12:06 +0100, Ralph Corderoy wrote:
 So a week's favoured;  sorry Tim.  Next meeting is Tuesday 2012-06-12.

Fair enough.  Hopefully I'll be able to get to the following one.

Tim.
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Re: [Dorset] June's Pub Meeting and the HM's Jubilee.

[Tim Waugh]

On Wed, 2012-05-02 at 11:28 +0100, Ralph Corderoy wrote:
 Shall we slip a day or a week?

A day is preferable for me.  I wouldn't be able to make it the following
Tuesday.

Tim.
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Re: [Dorset] Linux Distribution of choice?

[Tim Waugh]

On Sat, 2012-04-07 at 10:56 +0100, Simon P Smith wrote:
 I was a die-hard Fedora fan and then converted to Ubuntu. 

Curious: what prompted you to change your allegiance?

Tim.
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Re: [Dorset] Bournemouth Pub Meeting Tonight, Tuesday 2012-04-03.

[Tim Waugh]

On Tue, 2012-04-03 at 00:28 +0100, Ralph Corderoy wrote:
 For those that haven't been before look out for Terry.

I'll be there and I'll bring Tux along.

Tim.
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Re: [Dorset] Bournemouth Pub Meeting Tonight, Tuesday 2012-04-03.

[Tim Waugh]

Sorry, change of plan: I won't be able to go this evening after all.

Tim.
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Re: [Dorset] Links from Last Night, 2011-12-06.

[Tim Waugh]

Things I remember from our end of the table:

* PowerTOP - http://www.lesswatts.org/projects/powertop/ - for seeing
what's causing the CPU to wake up, with suggestions of what to do about
it.

* Liberation fonts were built to be metric-compatible with Microsoft
fonts, and are GNU GPL licensed
  http://en.wikipedia.org/wiki/Liberation_fonts

* There is a Terminal app for Android
  http://github.com/jackpal/Android-Terminal-Emulator/wiki

* There are apparently touchscreens in development that can vibrate each
pixel independently, allowing for textures to be felt (URL?)

Tim.
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Re: [Dorset] OT(ish): IDL

[Tim Waugh]

On Tue, 2011-10-11 at 20:16 +0100, Terry Coles wrote:
 So how do Unix/Linux progams export their interfaces?  In MS VisualStudio, I 
 can click on a function or method and right-click to get the interface.

The free desktop way of doing this is D-Bus.  The interface
description for your D-Bus object is written in XML:
http://dbus.freedesktop.org/doc/dbus-specification.html#introspection-format

and is available at runtime using the special
org.freedesktop.DBus.Introspectable interface on the object.

You can inspect running objects visually using d-feet, and even call
methods on them if you like:
http://live.gnome.org/DFeet/

I believe that gtk-doc can convert the D-Bus Introspection data into
e.g. HTML, as in:
http://www.packagekit.org/gtk-doc/PackageKit.html

For libraries, GObject Introspection is also relevant to this topic:
https://live.gnome.org/GObjectIntrospection

It's a method for automatically creating language bindings for APIs,
including documentation.

Tim.
*/



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Re: [Dorset] meeting at Broadway today 05/07

[Tim Waugh]

On Tue, 2011-07-05 at 11:13 +0100, Matteo Montanari wrote:
 Shall we go together then please?
 Please let me know .. I am in Springbourne .. close to King's Park.

I'm planning to be on the yellow 3 bus that leaves Gervis Place at
19.38, and I think the closest stops to you would be the Richmond Arms /
St Albans Church (19.51), both in Charminster Road.

Broadway Tavern (which the stop is called), i.e. The Broadway Arms is
where Charminster Road meets Castle Lane West.

Tim.
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Re: [Dorset] Location of July's Meeting.

[Tim Waugh]

On Thu, 2011-06-23 at 11:39 +0100, Ralph Corderoy wrote:
 In theory it's Blandford Forum's turn in July, but given poor turn-out
 there recently should be just settle on Bournemouth's The Broadway for
 every month?  Would the Broadway regulars turn out so soon after the
 last one?

Yes, I would.

Tim.
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[Dorset] GNOME 3

[Tim Waugh]

Information/tours for GNOME 3:
  http://www.gnome3.org/
  https://live.gnome.org/GnomeShell/Tour

Tim.
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Re: [Dorset] Bournemouth Pub Meeting Tonight, Tue 2011-06-07 20:00.

[Tim Waugh]

On Tue, 2011-06-07 at 09:30 +0100, Ralph Corderoy wrote:
 Tim Waugh mentioned
 
 http://www.openbusmap.org/?zoom=14lat=50.72384lon=-1.93526layers=BT
 
 on IRC's #dorset, which may be handy for those of us that haven't
 stepped on an omnibus in decades.

Actually my wife found this in the tourist information office:
  http://gettingabout.info/go.php?page=Bus%20Traveltopic=53

It's the same idea (all local bus routes on one map, not just one
company's), but complete and up to date.  I can't say the same about the
openstreetmap transport data unfortunately (although you do get to
update that yourself).

Tim.
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Re: [Dorset] CUPS lpr and code pages

[Tim Waugh]

On Wed, 2011-05-25 at 10:47 +0100, Ralph Corderoy wrote:
 It may be that CUPS lets one specify the incoming charset too but I
 didn't see anything obvious.  Locale environment variables perhaps?

It used to be the case that you could specify it like this:

lp -o document-format=text/plain;charset=... ...

but I think that CUPS requires UTF-8 now, for all IPP requests and for
input text documents.

Tim.
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