Re: Time Domain Reflectometer (was Re: internet outages)

2018-12-23 Thread John Hasler
rhkramer writes: > Yeah, but I wasn't thinking about actually using a CRT to display the > signal in real time, but, instead, collect samples (at maybe 4 GHz??), > store them, and then display them as a static display. At that sort of frequency sampling scopes (including the old crt ones) sample a

What's going on with dm-crypt?!

2018-12-23 Thread Celejar
Hi, I have / on a luks volume, mounted with dm-crypt (automatically, via /etc/fstab - /etc/crypttab). As recently as kernel 4.18.0-3, everything was normal. With 4.19.0-1-amd64, the volume mounts, and the system seems basically functional - but /dev/mapper is empty besides for 'control'! ~# ls -a

Re: Time Domain Reflectometer (was Re: internet outages)

2018-12-23 Thread Gene Heskett
On Sunday 23 December 2018 22:20:30 rhkra...@gmail.com wrote: > On Sunday, December 23, 2018 09:03:15 PM Gene Heskett wrote: > > On Sunday 23 December 2018 20:27:37 rhkra...@gmail.com wrote: > > > On Sunday, December 23, 2018 07:33:38 PM Doug wrote: > > > > RE: Time Domain Reflectometer: > > > > >

Re: Time Domain Reflectometer (was Re: internet outages)

2018-12-23 Thread rhkramer
On Sunday, December 23, 2018 09:03:15 PM Gene Heskett wrote: > On Sunday 23 December 2018 20:27:37 rhkra...@gmail.com wrote: > > On Sunday, December 23, 2018 07:33:38 PM Doug wrote: > > > RE: Time Domain Reflectometer: > > > > > > Theoretically, you can build your own with a fast pulse generator >

Re: Time Domain Reflectometer (was Re: internet outages)

2018-12-23 Thread Gene Heskett
On Sunday 23 December 2018 20:27:37 rhkra...@gmail.com wrote: > On Sunday, December 23, 2018 07:33:38 PM Doug wrote: > > RE: Time Domain Reflectometer: > > > > Theoretically, you can build your own with a fast pulse generator > > and an oscilloscope. The trick is, you need a REALLY FAST > > oscill

Time Domain Reflectometer (was Re: internet outages)

2018-12-23 Thread rhkramer
On Sunday, December 23, 2018 07:33:38 PM Doug wrote: > RE: Time Domain Reflectometer: > > Theoretically, you can build your own with a fast pulse generator and an > oscilloscope. The trick is, you need a REALLY FAST oscilloscope! The > pulse generator is easy, just a couple of transistors, maybe

Re: internet outages

2018-12-23 Thread Gene Heskett
On Sunday 23 December 2018 19:33:38 Doug wrote: > On 12/23/2018 04:24 PM, David Christensen wrote: > > On 12/23/18 12:11 PM, rhkra...@gmail.com wrote: > >> On Sunday, December 23, 2018 02:50:34 PM David Christensen wrote: > >>> On 12/23/18 2:02 AM, Curt wrote: > On 2018-12-22, David Christens

Re: internet outages

2018-12-23 Thread Doug
On 12/23/2018 04:24 PM, David Christensen wrote: On 12/23/18 12:11 PM, rhkra...@gmail.com wrote: On Sunday, December 23, 2018 02:50:34 PM David Christensen wrote: On 12/23/18 2:02 AM, Curt wrote: On 2018-12-22, David Christensen wrote: 1. Test and verify your network cables: https://www.

Re: internet outages

2018-12-23 Thread Joe
On Sun, 23 Dec 2018 16:46:43 -0500 rhkra...@gmail.com wrote: > > Oh, I misread that, I thought you wanted a URL for the under $10 > device. Try googling for time domain reflectometer, I don't think > you'll find one for even near $80 (but I'd love to be wrong) -- maybe > a cable loss tester at

Re: internet outages

2018-12-23 Thread rhkramer
On Sunday, December 23, 2018 04:24:58 PM David Christensen wrote: > > Wow, for $80 I would have expected something that would measure dB loss > > and maybe even a time domain reflectometer (well, maybe not that). > > Please provide a URL for such test instrument(s). Oh, I misread that, I thought

Re: File ownership problem using removeable media

2018-12-23 Thread tomas
On Sun, Dec 23, 2018 at 05:46:17PM +, mick crane wrote: > On 2018-12-23 17:10, to...@tuxteam.de wrote: [...] > >And you do that after each and every mount? > > > >Cheers > >-- tomás > well no, I didn't read properly and was trying to be helpful without > understanding what the problem was I

Re: internet outages

2018-12-23 Thread David Christensen
On 12/23/18 12:11 PM, rhkra...@gmail.com wrote: On Sunday, December 23, 2018 02:50:34 PM David Christensen wrote: On 12/23/18 2:02 AM, Curt wrote: On 2018-12-22, David Christensen wrote: 1. Test and verify your network cables: https://www.idealnetworks.net/us/en/products/cable-testing/coppe

Re: File ownership problem using removeable media

2018-12-23 Thread David Christensen
On 12/23/18 4:51 AM, Richard Owlett wrote: I use USB drives to transfer files between systems (sneakernet). All systems have only one user(richard). It was created during installation. The drives are either ext2 or ext4 formatted. All files were in /user/richard on source machine They _often_

Re: internet outages

2018-12-23 Thread rhkramer
On Sunday, December 23, 2018 02:50:34 PM David Christensen wrote: > On 12/23/18 2:02 AM, Curt wrote: > > On 2018-12-22, David Christensen wrote: > >> 1. Test and verify your network cables: > >> > >> https://www.idealnetworks.net/us/en/products/cable-testing/copper-testin > >> g/cable-verifiers-

Re: internet outages

2018-12-23 Thread David Christensen
On 12/23/18 2:02 AM, Curt wrote: On 2018-12-22, David Christensen wrote: On 12/22/18 7:16 AM, Jude DaShiell wrote: Has Linux got tools that can run while a computer runs that can poll several sites and log internet outages? I figure a minute down time is a failure and have experienced several

Re: File ownership problem using removeable media

2018-12-23 Thread mick crane
On 2018-12-23 17:10, to...@tuxteam.de wrote: On Sun, Dec 23, 2018 at 04:41:24PM +, mick crane wrote: [...] >find /home/richard -type d -exec chmod 750 {} \; >find /home/richard -type f -exec chmod 640 {} \; >chown -R richard /home/richard*; >chgrp -R richard /home/richard*; [sigh] missed

Re: File ownership problem using removeable media

2018-12-23 Thread tomas
On Sun, Dec 23, 2018 at 04:41:24PM +, mick crane wrote: [...] > >find /home/richard -type d -exec chmod 750 {} \; > >find /home/richard -type f -exec chmod 640 {} \; > >chown -R richard /home/richard*; > >chgrp -R richard /home/richard*; > > [sigh] missed off the slashes > > >chown -R richa

Re: Question on dpkg -l output.

2018-12-23 Thread Pascal Hambourg
Le 22/12/2018 à 02:44, aprekates a écrit : Indeed some are virtual or pure virtual (although i dont know the diff) But also there are packages like 'ergo' which look normal and the only relation i think found (reason to display it) is because libstd++6 depends on it. Also listed packages like '

Re: File ownership problem using removeable media

2018-12-23 Thread mick crane
On 2018-12-23 14:38, mick crane wrote: On 2018-12-23 12:51, Richard Owlett wrote: I use USB drives to transfer files between systems (sneakernet). All systems have only one user(richard). It was created during installation. The drives are either ext2 or ext4 formatted. All files were in /user

Re: File ownership problem using removeable media

2018-12-23 Thread mick crane
On 2018-12-23 12:51, Richard Owlett wrote: I use USB drives to transfer files between systems (sneakernet). All systems have only one user(richard). It was created during installation. The drives are either ext2 or ext4 formatted. All files were in /user/richard on source machine They _often_

Re: File ownership problem using removeable media

2018-12-23 Thread Pascal Hambourg
Le 23/12/2018 à 13:51, Richard Owlett a écrit : I use USB drives to transfer files between systems (sneakernet). All systems have only one user(richard). It was created during installation. The drives are either ext2 or ext4 formatted. All files were in /user/richard on source machine They _o

File ownership problem using removeable media

2018-12-23 Thread Richard Owlett
I use USB drives to transfer files between systems (sneakernet). All systems have only one user(richard). It was created during installation. The drives are either ext2 or ext4 formatted. All files were in /user/richard on source machine They _often_ [but not always] are seen as owned by 'root',

Re: internet outages

2018-12-23 Thread Curt
On 2018-12-22, David Christensen wrote: > On 12/22/18 7:16 AM, Jude DaShiell wrote: >> Has Linux got tools that can run while a computer runs that can poll >> several sites and log internet outages? I figure a minute down time is a >> failure and have experienced several of these where my wifi co