#raspberrypi IRC Log


IRC Log for 2018-10-11

Timestamps are in GMT/BST.

[13:42] -barjavel.freenode.net- *** Looking up your hostname...
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[13:42] -MemoServ- You have 2 new memos.
[13:42] -MemoServ- To read them, type /msg MemoServ READ NEW
[13:42] -freenode-connect- Due to the persistent ongoing spam, all new connections are being set +R (block messages from unidentified users) and will be scanned for vulnerabilities. This will not harm your computer, and vulnerable hosts will be notified.
[13:42] [freenode-connect VERSION]
[13:43] * RaspberryPiBot (~raspberry@unaffiliated/datagutt/bot/databot) has joined #raspberrypi
[13:43] * Topic is 'Unofficial RaspberryPi IRC channel but "Blessed" by the Foundation as the ONE channel. | Logs: http://srv.datagutt1.com | Rules: https://goo.gl/h5qPhz'
[13:43] * Set by gordonDrogon!~gordon@2001:4d48:ad51:8901::2 on Sat Dec 24 16:04:53 CET 2016
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[13:49] <BCMM> Khaytsus: yes, but probably don't plug anything else in to the board
[13:49] * colinjmatt (~colinjmat@matthews-co.uk) has joined #raspberrypi
[13:49] <BCMM> oh sorry wrong highlight
[13:49] <BCMM> didn't see kurolox had left
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[14:36] <GroovyNoodle> success! got the script working by putting /bin/bash -c before the path in conky!
[14:37] <GroovyNoodle> *crontab, not conky of course..
[14:37] <shiftplusone> your script was missing a shebang?
[14:38] <shiftplusone> specifying /bin/bash in contab isn't the right answer, but hey... if it works.
[14:38] <GroovyNoodle> yeah, and added #!/bin/bash to the script
[14:39] * Waldo (~Waldo@unaffiliated/waldo) Quit (Read error: Connection reset by peer)
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[14:44] * leptonix (~leptonix@a83-163-17-196.adsl.xs4all.nl) Quit (Ping timeout: 252 seconds)
[14:44] <shiftplusone> if it's an executable file (chmod +x blah) and has that line in it, then you shouldn't need the "/bin/bash -c"
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[14:47] * theooooooooo (50d70a9b@gateway/web/freenode/ip. has joined #raspberrypi
[14:47] <theooooooooo> Hi everyone! Just received my pi3b+, wondering if those docker images are compatible, couldn't find an answer... https://hub.docker.com/u/arm64v8/
[14:48] <theooooooooo> I understand earlier pis were v7, but unsure if the new b+ is v8
[14:48] <shiftplusone> not if you are running raspbian, which is armhf, not arm64
[14:49] <mlelstv> actually 3 and 3b are v8 but start as v7 compatible.
[14:49] <theooooooooo> yup I'm preparing a headless raspbian install atm
[14:49] <shiftplusone> then it won't work
[14:50] <shiftplusone> if you're flashing raspbian, check that you've got the version released today... will save time updating the old image
[14:51] <theooooooooo> yeah it's weird I've had to download the image twice, and I first got today's image (download not completed), changed to my phone's hotspot and now I can only get the June one
[14:51] <theooooooooo> on the dl zip link at https://www.raspberrypi.org/downloads/raspbian/
[14:52] <theooooooooo> (for stretch lite, I do not need a desktop and plan to do everything via ssh)
[14:52] * sonicdee (~linushec@linus.powered.by.lunarbnc.net) has joined #raspberrypi
[14:53] <theooooooooo> it seems like their server is undergoing some stuff, now I only get 404s...
[14:53] <shiftplusone> it's still being uploaded to the mirrors
[14:53] <shiftplusone> refresh a few times
[14:54] <theooooooooo> yup... I'll wait then
[14:54] <theooooooooo> thanks :)
[14:54] <shiftplusone> np
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[15:07] <TRuGNDr> Hello everyone,
[15:07] * swensson (55778277@gateway/web/freenode/ip. Quit (Quit: Page closed)
[15:08] <TRuGNDr> Anyone knows a C or Python program using wiring pi for RHT04(DHT33) sensor?
[15:08] * mythos (~mythos@unaffiliated/mythos) has joined #raspberrypi
[15:09] <theooooooooo_> for the headless setup I'm reading that I should put an empty 'ssh' file in the boot partition, but after the etcher flash the sd card only has one partition (/dev/sda1, that's all)
[15:09] <gordonDrogon> TRuGNDr, wiringPi how different are they from the rht03 ?
[15:10] <gordonDrogon> I'd try the rht03 driver if I were you - might just work.
[15:11] <gordonDrogon> e.g. gpio -g -x rht03:100:17 aread 100 # read tempterature of device on pin bcm_gpio 17 ...
[15:13] * bitmask (~bitmask@pool-71-187-148-49.nwrknj.ftas.verizon.net) Quit (Ping timeout: 252 seconds)
[15:13] <gordonDrogon> theooooooooo_, did you run etcher on a MS PC? It might only see the first partition...
[15:13] <theooooooooo_> nope I'm on ubuntu 18
[15:15] <theooooooooo_> I've umounted, trying again...
[15:15] <theooooooooo_> could it be because I'm using a usb converter to access to the sd card ?
[15:17] <gordonDrogon> Hm.
[15:17] <gordonDrogon> I'd simply dd the .img file
[15:18] <gordonDrogon> didn't realise there was an etcher for linux..
[15:18] <theooooooooo_> ooh I'm simply dumb, I was flashing the zip
[15:18] <theooooooooo_> the img is in the zip
[15:19] <gordonDrogon> :)
[15:19] * toxync21 (~toxync21@ has joined #raspberrypi
[15:20] <gordonDrogon> also, make sure your pc isn't auto-mounting the card. I usually run sync, then eject the card, then re-insert it to make the kernel re-read the new partition table, then you can mount the first partition, etc.
[15:20] <theooooooooo_> but yeah etcher works like a charm :)
[15:20] <theooooooooo_> yeah I guess if I dont see the proper partitioning I'll go back to dd-ing
[15:21] <gordonDrogon> etcher... dd for millenials ;-)
[15:21] <theooooooooo_> haha you got that right
[15:21] <theooooooooo_> even has the electron gui
[15:21] <mfa298> I think etcher can handle the zip file without decompresssing mnully (at least thats what people sy for windows), but you might need to remove the sd and re-insert it to get the new prtition table
[15:21] <gordonDrogon> hm. no etcher in devuan jessie though - the linux port must be relatively new.
[15:22] <theooooooooo_> well it didnt decompress the zip for me, on ubuntu
[15:23] <theooooooooo_> all right I'm good, etcher on the .img, sync, unplug/replug the usb-sd converter and it's working!
[15:24] <TRuGNDr> thank you <gordonDrogon> I'll try rht03 driver
[15:25] <gordonDrogon> TRuGNDr, the reading from the gpio command will be temp * 10 (and if you aread 101 you'll get the RH * 10)
[15:25] <gordonDrogon> if you get 9999 or 9998 it means a mis-read- it's just using a software timing loop, so sometimes hiccups.
[15:28] * Armand (~Armand@office.prgn.misp.co.uk) Quit (Quit: Leaving)
[15:28] <Khaytsus> gordonDrogon: etcher = newb mode is more like it
[15:29] <Khaytsus> Kind of like when I heard there's putty for Linux......
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[15:34] * theooooooooo_ (50d70a9b@gateway/web/freenode/ip. Quit (Ping timeout: 256 seconds)
[15:36] <H__> yeah, that's an abomination ;-)
[15:36] * j7k6 (~j7k6@unaffiliated/j7k6) Quit (Ping timeout: 272 seconds)
[15:37] <gordonDrogon> there's putty for linux?
[15:38] <gordonDrogon> I just can't help myself thinking "why?"
[15:38] <gordonDrogon> still - I guess it's nice to have choice.
[15:38] <BCMM> good for testing stuff
[15:38] <gordonDrogon> and I use juiceSsh on my android phone .
[15:38] <BCMM> and good if you've already got a bunch of complex putty configurations from Windows i guess?
[15:39] <Khaytsus> No, it's newb mode.
[15:39] * bortzmeyer (~stephane@2a01:e35:2fb3:e1d0:c499:9baf:6eca:8815) has joined #raspberrypi
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[15:49] <Kobaz> oh yeah
[15:50] <Kobaz> i never checked my question from yesterday
[15:50] <Kobaz> what onboard sensors are on a pi 3 b ?
[15:50] <Kobaz> there's system temperature... and anything else?
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[15:52] <BCMM> Kobaz: there's a low voltage sensor (literally binary, though - not a true voltmeter)
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[16:01] <Kobaz> ah
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[16:01] <Kobaz> so nothing fun built in like a gyro or accelerometer
[16:01] <Kobaz> trying to cobble a demo real quick without any other components
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[16:09] <shiftplusone> nope, nothing like that. That's what the GPIO pins are for.
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[16:33] <gordonDrogon> Kobaz, get the astro pi hat... lots of nice "stuff" on-board.
[16:36] <shiftplusone> if you don't need accuracy
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[16:45] <gordonDrogon> the imu is ok, isn't it?
[16:45] <gordonDrogon> I know the temperature is somewhat creative ;-)
[16:46] <shiftplusone> imu is fine
[16:47] <shiftplusone> temperature is too high since it's too close to the pi and relative humidity values can be questionable.
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[17:03] <theoooooo> moving on! :) I'm installing this [image](https://hub.docker.com/r/ownyourbits/nextcloudpi-armhf/), with a local ip domain, new to docker, what if I want to put it to a duckdns.org public address?
[17:04] <theoooooo> do I need to install it again?
[17:04] * OO-Dragon (~OO-Dragon@S0106c0562764dce8.wk.shawcable.net) Quit (Quit: Leaving.)
[17:04] <Kobaz> gordonDrogon: that wont help for a demo in a few hours :P
[17:06] <shiftplusone> How does one end up in the situation where they have a few hours to put a demo about something they're not familiar with? =S
[17:06] <shiftplusone> *put together
[17:08] <BurtyB> you could always blink the power led :)
[17:09] * mumixam (~m@unaffiliated/mumixam) has joined #raspberrypi
[17:09] <Kobaz> shiftplusone: when you're invited to do a demo real quick and they say "here's a raspberry pi, go have fun"
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[17:09] <stiv> go for The Blinky LED (assuming you can find an led and a resistor)
[17:09] * mumixam (~m@unaffiliated/mumixam) Quit (Max SendQ exceeded)
[17:10] <Kobaz> we're doing something with asterisk, so it'll still be fun
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[17:10] <shiftplusone> oh right
[17:11] * mumixam (~m@unaffiliated/mumixam) Quit (Max SendQ exceeded)
[17:11] <shiftplusone> Sounded like very late homework
[17:11] <Kobaz> haha
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[17:12] * woolly (~woolly@0540d152.skybroadband.com) Quit (Ping timeout: 268 seconds)
[17:12] <Kobaz> my partner is at a trade show and got pushed into doing a competition
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[17:13] <Kobaz> http://www.digium.com/blog/2016/08/11/astricon-2016-preview-dangerous-demos/
[17:13] <Kobaz> the 2018 version
[17:14] <Kobaz> i won two awards at last year's
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[17:23] <GrandPa-G> is there an easy way (maybe program) to run a program called driver that will toggle a GPIO pin that program B is trying to detect? I.e. can a program simulate an external switch?
[17:25] <stiv> easier to do that in software. otherwise you want a pin to be both input and output
[17:28] * eni23 (~eni@office-begi.adfinis-sygroup.ch) Quit (Quit: Leaving.)
[17:28] <GrandPa-G> I do have another Raspberry that I tried running a program on, but I don't know how to wire the two GPIO headers
[17:30] <gordonDrogon> GrandPa-G, yes you can do that.
[17:30] <gordonDrogon> GrandPa-G, if you have a pin in input mode then you can change the internal pull up and pull down resistors to simulate input.
[17:31] <GrandPa-G> gordonDrogon:How would I wire it for 2 pis? I would like to keep driver off same pi if possible as this is for a stress test
[17:33] * jkridner|pd is now known as jkridner
[17:33] <gordonDrogon> to wire for 2 Pi's then firstly connect 0v together.
[17:33] <gordonDrogon> then just connect 2 gpio pins - make sure one is output and one is input.
[17:34] <gordonDrogon> you might want to put a 220Ω resistor on the connection - that will save you IF you set both the output AND you set one high AND the other LOW.
[17:34] * Snircle (~textual@ip174-65-166-68.sd.sd.cox.net) has joined #raspberrypi
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[17:35] <gordonDrogon> however - stress test - if you're writing code to bang a pin as fast as possible and sample it as fast as possible, then you are doing it wrong.
[17:35] <gordonDrogon> IMO.
[17:35] * random_yanek (~random_ya@host-89-230-167-171.dynamic.mm.pl) has joined #raspberrypi
[17:38] <GrandPa-G> gordonDrogon:I always will listen to you young wipersnappers. What would you suggest?
[17:39] <gordonDrogon> GrandPa-G, I don't know what you are trying to achieve, but 2 wires is all you need for Pi to Pi.
[17:40] <GrandPa-G> gordonDrogon:I have a program that is going to count a sensor that is on/off very fast. I want to see if my program will keep up.
[17:41] <gordonDrogon> it won't.
[17:41] <gordonDrogon> well - not reliably.
[17:41] <gordonDrogon> you might want to look at the pigpio library - I think that samples a pin every 5�S by default.
[17:42] <gordonDrogon> so ~100Khz max.
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[17:44] <GrandPa-G> I had thought of switching to pigpio. Exactly what does 100Khz mean in terms of minutes/seconds? what was the 5?S ?
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[17:46] <gordonDrogon> 5 mircosecond sampling.
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[17:46] <gordonDrogon> or 200,000 samples/sec / Nyquist
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[17:49] <GrandPa-G> they need about 4-7 samples/sec if my math is correct
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[17:58] <GrandPa-G> gordonDrogon:if you don't mind helping me, I connected driver pi grnd to program pi grnd. driver pi pin 26 to 220 resistor to program pin 26. without doing anything more, the program is detecting negative edge constantly. What am I missing?
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[18:01] <gordonDrogon> I'd start by simulating it on just one Pi.
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[18:01] <gordonDrogon> remove the wires, then run the listner program, then open a 2nd terminal and type:
[18:02] <gordonDrogon> gpio -g mode 26 up
[18:02] <gordonDrogon> gpio -g mode 26 down
[18:02] <gordonDrogon> (assuming it's bcm_gpio pin 26).
[18:02] <gordonDrogon> that ought to cause the blip that the listening program can detct.
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[18:03] <gordonDrogon> if it's physcial pin 26 then change -g to -1
[18:03] <GrandPa-G> gordonDrogon:I will take your approach. I see where you are going with this.
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[18:05] <gordonDrogon> I take small steps first and test things incrementally.
[18:05] <stiv> mini-rant: when building systems, it is better to test as you go and make sure each part is working *before* you connect the whole mess together
[18:05] <stiv> one of the most overlooked points is: how are we going to test this?
[18:05] <veverak> yup
[18:05] <veverak> :)
[18:06] <veverak> some things one has to learn the hard way
[18:06] <gordonDrogon> stiv, losing that battle, sadly )-:
[18:06] <Snert_> knowing what good looks like 1/2 the battle.
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[18:07] <gordonDrogon> I've seen people build some fairly complex hardware systems, then write 1000's of lines of code without even making sure the wires are connected in the right order )-:
[18:08] <Snert_> that's okay to an extent, depending on experience level.
[18:08] <shiftplusone> I don't think it is
[18:08] <shiftplusone> everybody makes mistakes
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[18:09] <Snert_> one picks and chooses which/when to do intermediate testing.
[18:09] <Snert_> depending on experience level.
[18:10] <Snert_> it's okay to use a calculator when you understand the underlying math - sort of thing.
[18:11] <shiftplusone> That's like saying it makes sense to write the whole application and then expect it to compile 1000s of lines later, because you have experience.
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[18:12] <gordonDrogon> I find it worse that I see people teaching "physical computing" by getting them to wire up some LEDs and switches then having then write a 100 line python program without knowing that the LEDs are the right way round (and they've only learned python the hour before) Maybe it's just me though.
[18:12] <shiftplusone> ah well, to each their own. I don't think anybody with enough experience not to make a mistake would assume that they don't make mistakes.
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[18:13] <Snert_> nope. It's not you. I verify every single thing, but noobs dunno.
[18:13] <malh> Hey guys. I accidently ran echo "export PYTHONPATH=$(pwd):\$PYTHONPATH" >> ~/.profile and now I get errors when running the source ~/.profile command
[18:13] <Snert_> when they can skip something and when not to.
[18:13] <malh> How do I go back :/?
[18:14] <gordonDrogon> malh, you edit .profile and remove the last line.
[18:15] <malh> gordonDrogon: But the last line is just an end if aka "fi"
[18:16] <malh> Its weird because PYTHONPATH is nowhere in the source file
[18:16] <gordonDrogon> well maybe you made a typo somewhere.
[18:17] <malh> I just ran that command and then i get an error with virtualenvwrappper.shexport
[18:18] <malh> Before it ran fine and I could access my venv
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[18:19] <GrandPa-G> gordonDrogon:My lame excuse was I didn't think I could have 2 programs running against the same pin. My driver is working now on the same box. Please don't put me in with the do all at once group. I am very incremental.
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[18:24] <gordonDrogon> GrandPa-G, now connect the 2nd Pi - and you can still use the gpio up/down commands with the pin in input mode - as long as the wires are short it will work.
[18:24] <gordonDrogon> then move to putting the pin in output mode and gpio mode $pin out ; gpio write $pin 1 ; gpio write $pin 0
[18:25] <GrandPa-G> gordonDrogon:I think this will be good enough for now. thanks
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[18:26] <malh> gordonDrogon: It seems like it has put something at the end of a file, because my error is virtualenviromentwrapper.shexport is not a folder
[18:29] <GrandPa-G> since I am resolving things, the application is a python pyqt5 app. Is there anyway (or do I need to care) to keep this app window on top and active as it is a kiosk type machine that always needs to be ready for text input via a hand held scanner into one text box.
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[18:31] <ssl_> using https://www.raspberrypi.org/documentation/configuration/config-txt/gpio.md and added "gpio=5=op,dl" to my config.txt but it doesn't work, the pin is still an input when booting, causing the level to float. how do I debug this? I haven't found anything in the dmesg output
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[18:32] <ssl_> do I have to set the alt-mode to a specific mode? I'm trying to change the behaviour of this pin here: https://pinout.xyz/pinout/pin29_gpio5
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[18:33] <gordonDrogon> malh, if you run the script with sh -x ~/.profile it will give you the line numbers as it runs.
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[18:37] <malh> gordonDrogon: Im so confused that I can't see it in the actual file when i browse and open the profile file
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[18:46] <gordonDrogon> malh, sort of ay the limit of what I can do to help - I'd edit the file and look, if it were me, but I've been using linux & unix for a very long time, however I know nothing about python, so have no idea what that error is.
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[19:03] <Snert_> root@berrypi:/sys/devices/platform/rpi-poe-fan@0/hwmon/hwmon0# cat pwm1
[19:03] <Snert_> 50
[19:03] <Snert_> 50 is 50% fan rpm?
[19:03] <Snert_> it seems to alternate twixt 50 and 0
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[19:09] <ssl_> still looking for a solution or any pointers to my question above
[19:10] <shiftplusone> Snert: PWM value of 50/255
[19:11] <Snert_> cool...thx.
[19:11] <shiftplusone> heads up that the current kernel ignores hysteresis values
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[19:11] <shiftplusone> PR to fix that here https://github.com/raspberrypi/linux/pull/2700
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[19:12] <Snert_> that's okay. I'm looking to know if the fan is clogged with dust under the house :)
[19:12] <Snert_> a go/no go indication.
[19:12] <shiftplusone> ah... no way to do that
[19:12] * will[c] is now known as willc
[19:12] <H__> ssl_: wfiw i never used gpio.md but set these things in scripts with wiringPi . Maybe that could work for you too ?
[19:13] <Snert_> ok....so a microphone inside the network cabinet under the house I guess. I could hear it spin up and down .
[19:14] <shiftplusone> might be easier to just check the temperature
[19:15] <ssl_> H__ I really like to have it set as soon as possible after power-on, because I have a motor controller attached and it randomly jerks around while booting beacuse of this :(
[19:15] <shiftplusone> if the fan doesn't seem to be helping then you know something is up
[19:15] <ssl_> it seems to be that what I read on gpio.md is not working at all
[19:16] <ssl_> that's why I ask a way to check if it was even parsed
[19:16] <shiftplusone> ssl_: I haven't checked, but try vcdbg log msg
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[19:18] <ssl_> shiftplusone yes I tried that one after reading the overlay/README file, but it doesn't seem to contain any referene of the gpio=5=op,dl command I put into the config.txt. I guess that's because it's not DT related
[19:18] <ssl_> ie. it's not a dtparam statement
[19:22] <ssl_> just tried gpio=0-27=op,dl just to make sure I have the correct pin, but the result is the same...
[19:22] <ssl_> was this feature added super recently and I need to update somehow?
[19:24] <ssl_> checking https://github.com/raspberrypi/documentation/tree/master/configuration/config-txt and it indeed seems like at least the documentation only was added a couple months ago
[19:24] <ssl_> how can I confim I have this feature or not in my image?
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[19:45] <on3pk> So, my raspberry pi keeps crashing. (Or at least it looses its network connection or something.) Is there a log or something that I can look at or is that something I need to enable?
[19:47] <Snert_> start a continual ping against the pi. Does the ping ever die?
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[19:51] <on3pk> dang I can't even find it's IP...
[19:51] <larsks> on3pk: when you can log in you can check the system journal for errors (i.e. run journalctl)
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[19:52] <Snert_> on3pk: best to get cognizant of your network surroundings.
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[19:53] <Snert_> Do the continual ping against the pi while wiggling cables...etc.
[19:54] <on3pk> I should probably start by hooking it back up to a monitor and setting it to use a static ip instead of dhcp
[19:54] <on3pk> So I can find it on the network
[19:54] <Snert_> sure. All critical infrastructure should be static anyways.
[19:54] <Snert_> and not dhcp with reservations.
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[19:59] <ssl_> good news shiftplusone H__: I did a apt-get upgrade and it's working as expected now thanks
[20:00] <ldiamond> Does the raspberry pi provide any mean to make it "hard" to tamper/read the filesystem on the sd card without requiring manual decryption at boot?
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[20:01] <Snert_> ldiamond: physical security, yes. hide it...but I assume you want something other than that.
[20:03] <ldiamond> yea, the best I've found so far (which is pretty damn weak) would be to use the OTP data as a decryption key. At least someone who takes the SD card can't decrypt the encrypted partition but it's easy to find the key if you get physical access again
[20:04] * dreamon (~dreamon@unaffiliated/dreamon) Quit (Remote host closed the connection)
[20:04] <ldiamond> There's Zymkey, but I don't know how good it really is.
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[20:07] <Snert_> just steal the whole pi.
[20:07] <Snert_> mess with it later.
[20:07] <gordonDrogon> quite.
[20:08] <gordonDrogon> however you can create an encrypted filesystem that needs a password to mount.
[20:08] <Snert_> whocares about the SD card....I'll throw my own in.
[20:08] <Snert_> it's the pi I want.
[20:08] <gordonDrogon> so boot the pi normally, then manually mount the partition, giving the key at the keyboard.
[20:08] <ldiamond> Snert_: I don't care about the Pi
[20:09] <gordonDrogon> luks is what you need to google for.
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[20:43] <ldiamond> gordonDrogon: I know about luks, the problem is that I want the pi to boot unattended.
[20:44] <ldiamond> The key needs to come from somewhere.
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[20:44] <CoJaBo> ?
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[20:46] <gordonDrogon> that doesn't make it secure then - the pi is so small, anyone will steal both then have the data and the Pi.
[20:47] <bindi> ssh unlock?
[20:47] <bindi> that can be done
[20:47] <bindi> https://unix.stackexchange.com/questions/5017/ssh-to-decrypt-encrypted-lvm-during-headless-server-boot
[20:47] <gordonDrogon> however if you want to pretend it's secure, then you can grep Serial /proc/cpuinfo and use that as a key of sorts ...
[20:48] <CoJaBo> Just pot the entire thing in epoxy. Make them work for it, dagnabbit :P
[20:49] <gordonDrogon> nah, concrete t into the floor.
[20:53] <norwood67> is there a way to tell if you my rpi is picking up the 'bleeding edge' or kernels? at some point, i had picked up a newer kernel because i was having trouble with the SSD drive. with that fixed, want to have the kernel at the stable kernel
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[20:59] <BCMM> norwood67: are you asking how to tell what kernel version you're currently running?
[21:02] <norwood67> sort of.
[21:03] <norwood67> it looks like everytime apt-get upgrade runs, i'm getting new /boot stuff and i don't remember that always happening
[21:05] <norwood67> actually, i see how to revert back to supported kernel
[21:05] <norwood67> so, i'll just do that on the test machine
[21:05] <norwood67> and see what happens
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[21:19] <uriah> does anyone in here run gqrx on a pi?
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[21:24] <setham> Hello, thanks in advance for any help.
[21:24] <setham> I changed the hostname to two raspberry pi, both running 4.14.70-v7+ using raspi-config. I also updated the DHCP/DNS table so I can access both raspberries by their new name. I can ping, ssh, all resolv commands function with the new hostnames, however if I run arp -a, one of the raspberries cames up with the old hostname
[21:24] <setham> I had rebooted, dhcpserver, dns server (dnsmasq/pihole), the raspberries and the issue persists. The old name shows in arp in lan clients
[21:24] <setham> What I might be missing to update? thanks
[21:24] <norwood67> does the dns need to be updated on the machine you are using?
[21:25] <norwood67> what if you ssh to the machine you can see. can you ssh to the other machine or ping it?
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[21:25] <Snert_> what is your TTL on the DNS record?
[21:28] <setham> local-ttl=2
[21:29] <setham> I changed the names yesyerday
[21:29] <H__> 2 seconds ?!
[21:29] <setham> dns comes from pi-hole conf
[21:30] <setham> yes, and I even rebooted all of them
[21:30] <setham> is kind of odd
[21:31] <setham> If I go to a client I cannot ping the old name, just the new name
[21:31] <setham> but if at the pi-hole I do a nslookup I get the same IP for both names, old and new
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[21:34] <norwood67> where do you run arp -a from?
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[21:43] <Kobaz> noregret: a shell
[21:43] <Gathis> norwood67 the arp command or address resolution protocol only works for resolving ethernet to MAC address mapping for your local network segment, so it'll tell you the MAC addresses of any local device you've recently pinged or connected to, but not anything beyond a router.
[21:43] <Kobaz> i prefer arp -n
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[21:45] <norwood67> i understand that Gathis
[21:45] <Gathis> when testing things (routers usually) with the same IP, i find arp -d handy to flush old out of date info
[21:46] <norwood67> Gathis: ok. i don't understand your point?
[21:48] <Gathis> nevermind, just that i seldom need that command. It can be useful to list MACs, the only other use I have is what i said, flushing incorrect MAC/IP pairings when swapping hardware around.
[21:50] <Gathis> reading back^ setham perhaps needed that :)
[21:51] <norwood67> Gathis: totally agree. I had a similar problem that setham mentioned when I moved dns to pi-hole. arp was show different things on my mac vs the pihole machine. which is why i was wanting to understand where he ran arp from.
[21:52] <setham> I tried flushing, rebooting
[21:52] <setham> I just noticed the arp -a was showing the old name
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[21:53] <norwood67> side note: i've found that on DNS issues the best thing to do is get soda and relax for a bit. (this is all for my home network. no one would ever employment for real neetwork admin. )
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[21:58] <setham> Same here, my home network
[21:59] <setham> worst I just reinstall the pihole
[21:59] <norwood67> what are you using for a firewall or router? did you set the dns entries in there correctly?
[21:59] * TheSilentLink (~TheSilent@unaffiliated/thesilentlink) Quit (Quit: Good Bye! My bouncer has probably crashed or lost connection to the internet...)
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[22:04] <setham> yes, openwrt for dhcp/dnsmasq, pihole points to the openwrt
[22:05] <norwood67> and you turned everything off on your network, include the computer you are currently on?
[22:05] <setham> DNS is working but for this particular host
[22:05] <setham> I had rebooted, not turn off
[22:06] <norwood67> i don't know if there could be something cached at the hardware but turning off and on the network card might clear it
[22:08] <Encrypt> setham, I installed Unbound here
[22:09] <Encrypt> And put a curl in my crontab to download ads domains
[22:09] <Encrypt> That's far lighter than PiHole :P
[22:10] * setham (~textual@unaffiliated/setham) Quit (Ping timeout: 244 seconds)
[22:11] <norwood67> Encrypt: pihole has a nice UI and i like the reporting built in.
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[22:11] <Encrypt> Yeah, right
[22:13] <norwood67> I was using Unbound on PFsense and I had a lot of issues. mostly with PFsense implementation .
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[22:32] <jancoow> ugh. I just updated my ubuntu server from 16.04 to 18.04
[22:32] <jancoow> and now my NFS boots over the network aren't working anymore
[22:32] <jancoow> the pi hangs
[22:32] <jancoow> which version of nfs is the pi kernel using?
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[22:42] <theo_> hi!
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[22:43] <theo_> I'd like to setup something like theo.net/{nextcloud,git,blog}, I'd like to do that using docker+traeffic as it sems like the most convenient combo
[22:43] <theo_> I'm reading a lot of stuff, looking for some advice
[22:44] <theo_> e.g. the most comprehensive guide I've found is this
[22:44] <theo_> https://pascalandy.com/blog/traefik-demo-docker-stack-and-play-with-docker/
[22:44] <jancoow> ugh, adding ,vers=3 fixed the problem
[22:44] <theo_> why would we need the docker network mode, or the docker stacks ?
[22:44] <jancoow> it did cost me one SD card. I forgot the pi 2 has an lockable SD card slot lol
[22:44] <jancoow> so annoying they removed that on the 3
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[22:49] <Encrypt> theo_, You don't need Docker
[22:49] <Encrypt> You'd better put an NginX process in front of your applications
[22:49] <Encrypt> And let NginX forward the requests
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[22:50] <theo_> isn't a good security thing to have the containerization ?
[22:50] <Encrypt> I'm not a big fan of containers
[22:51] <theo_> i'm interested in starting to self host things, but I'm new enough to try and secure as much as I can
[22:51] <theo_> how so?
[22:51] <Encrypt> I might be wrong, but if your containers need X times the same library, it will be loaded X times in memory
[22:51] <Encrypt> So, that's not the best on a Raspberry Pi :P
[22:51] <Encrypt> theo_, I actually did what you're trying to do
[22:51] <theo_> that's what I understood went for VMs, and that Docker was smarter
[22:52] <Encrypt> theo_, Proof: http://share.encrypt-labs.tk/rpi1.jpg / https://blog.encrypt-labs.tk/
[22:53] <Encrypt> I played with subdomains though
[22:53] <theo_> plus I understand that getting https stuff with nginx was not a very pleasant thing
[22:53] <Encrypt> Because that's nice :P
[22:53] <Encrypt> Wut
[22:53] <Encrypt> It's a matter of 10 lines
[22:53] <Encrypt> And one call to certbot
[22:53] <theo_> huh, ok
[22:53] <Encrypt> (Considering you'll use Let's Encrypt)
[22:54] <theo_> yup.... idk, I guess since I had tried cloudron I was interested in the traeffik+docker approach to add apps easily
[22:54] <Encrypt> Well, you can try
[22:55] <Encrypt> You'll tell me how it went :P
[22:55] <Encrypt> I'm actually curious to know that
[22:55] <theo_> haha ok, well still looking for some decent guide
[22:55] <theo_> I lack the basic knowledge, so I'm easily lost on the guides I've found
[22:55] <theo_> (on peut parler francais hehe, je viens de charger ton blog)
[22:56] <theo_> maybe I lack more experience than knowledge, but that's a different question
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[23:06] <jancoow> I love containers
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[23:07] <jancoow> I've a nginx reverse proxy container which is doing reverse proxy to each other container
[23:07] <jancoow> with difference services
[23:07] <jancoow> running like ~20 dockers
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[23:07] <theo_> on a raspberry or something beefier ?
[23:07] <Lartza> Totally something beefier
[23:07] <Lartza> Still wouldn't want to load the same library 20 times :P
[23:08] <theo_> haha so that does happen?
[23:08] <Lartza> Of course
[23:08] <theo_> I thought docker was the smart stuff
[23:08] <theo_> well smarter than vms
[23:08] <Lartza> I mean containers can use system libraries but
[23:09] <Lartza> Doesn't mean they always do
[23:09] <Lartza> My main issue with containers is they get in my way
[23:11] <Lartza> Also it's totally possible to run redis as it's own container
[23:11] <Lartza> And not docker compose, but whatever
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[23:16] <jancoow> oh yeah sorry on my server
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[23:22] <Lartza> Also my last two messages were supposed to be part of another docker discussion, whoops :P
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