Ask Ubuntu General Room

TheWanderer

3:08 PM

4

David Foerster

@TheWanderer ceiling cat walking with its back to the ground.

TheWanderer

@DavidFoerster and floating on the floor

(⌐■_■)(⌐■_■)

@NathanOsman you have that ^ emoji in the menu, so why doesn't it parse?

RPi Awesomeness

@TheWanderer Is that your cat? xD

@NathanOsman I got a Go question, when you get a moment

TheWanderer

no

nor my GIF

RPi Awesomeness

Ah, gotcha. Still funny xD

Seth

3:24 PM

@RPiAwesomeness Iz curious

RPi Awesomeness

@Seth Nothing crazy, I'm working on a notification system that makes use of RethinkDB's changefeeds.

For the bot project I'm a part of

Seth

Ah. Cool!

RPi Awesomeness

Yeah. I think I figured it out, I just want to get some clarification, and he knows a fair bit :P

It's actually a really good project though, makes use of goroutines and channels and websockets, so lots of learning experiences \o/

Go is pretty cool.

And it makes pretty code.

Seth

3:48 PM

I've barely used go but I loved every bit of it when I did.

@RPiAwesomeness Oh that's awesome

Nathan Osman

4:05 PM

@RPiAwesomeness Yes?

Grafana is a cool tool:

The top half is metrics from my server and the bottom half is data fed from my sensor here.

RPi Awesomeness

@NathanOsman Oh sweet, you're here. My question is about the init() function.

I have a few objects/structs that keep track of pointers. I declared the variable outside of init() (that makes it global to that file, right?) and then assigned the values to the variable within init() with a few function calls.

The issue is that if I try to access those pointer things in main() they're set to nil, even though they were fine in init().

I was able to fix it by not using pointers, but I was curious if you knew why that was happening.

Nathan Osman

@RPiAwesomeness Yes, variables declared outside a block are global.

Depending on the capitalization of the first character of the variable name, they are either package-local or exported.

@RPiAwesomeness That's strange since init() functions always run before main().

RPi Awesomeness

That's what I expected

But it works fine if I don't use pointers and it works fine WITH pointers, but only if I use them in the same function.

Nathan Osman

Are you able to show a snippet where you initialize the variable?

RPi Awesomeness

4:21 PM

@NathanOsman gist.github.com/RPiAwesomeness/0793a3d515b1f398bcbd0dcca7234106

Zanna

@SergiyKolodyazhnyy I only just saw your comment on my answer on 21st May, and only just noticed you'd answered that Q too

Nathan Osman

config, err := LoadConfig()

^--- that line's your problem

You have just created two local variables limited to that function.

The := operator not only assigns but declares variables.

RPi Awesomeness

But I have to do that since err is local.

I guess I could put var err error before it

Nathan Osman

That is one way to do it.

Or... another way would be this way:

c, err := LoadConfig()
//...
config = c

Sidenote:

err = rdbConn.Connect()
if err != nil {

...can be written:

if err := rdbConn.Connect(); err != nil {

Then err becomes local to the if block.

I'm still not sure why rdbConn.Session is nil in main() though...

RPi Awesomeness

My guess is it has something to do with scoping and pointers interacting weirdly.

Nathan Osman

4:27 PM

Can you verify that it is non-nil at the end of init()?

RPi Awesomeness

Yup

I could add to the repo. It's private currently, but then I could ask questions and you could point out other silly things I do :P

Nathan Osman

Is this the package you're using? godoc.org/github.com/GoRethink/gorethink

RPi Awesomeness

Yup

@NathanOsman I invited you on GH for the repo

Make looking around and figuring this out a bit easier

Nathan Osman

Okay.

RPi Awesomeness

If you have the time of course, don't want or need to impose on you :P

Nathan Osman

4:32 PM

I have a few minutes, no problem.

@RPiAwesomeness so just to be clear, the code in there now works? Or it doesn't?

RPi Awesomeness

It should work

It requires RethinkDB to run though

Thomas Ward

~~GREETINGS MINIONS~~

uh, i mean, hello!

anyone seen @Rinzwind around?

cl-netbox

@ThomasWard Hello Thomas ! :) Welcome back evil and darkness ... :D

Jacob Vlijm

@ThomasWard probably preparing for the football match Ajax-Manchester.

cl-netbox

@ThomasWard I think @Rinzwind is preparing to watch Ajax vs. United European soccer cup final. :)

Hey @JacobVlijm ! :)

Thomas Ward

4:45 PM

ah, well he owes me a sample of WannaCry[pt] because I said so :p

we want to do testing here at a lab environment xD

Jacob Vlijm

Hey Boxy! @cl-netbox

Nathan Osman

@RPiAwesomeness from what I can tell, what you have now is probably the best way to do it.

Jacob Vlijm

@ThomasWard if Ajax wins, he'll give it to you

cl-netbox

@JacobVlijm If Ajax looses @Rinzwind gives all his points to our most evil mod @ThomasWard ! :D :D :D So, Thomas, who do you want to win the finals ? :D :D :D

Thomas Ward

E: Sport not tracked, no opinion available

E: getOpinion(Sports("Ajax v. United European")) returned "False"

cl-netbox

4:55 PM

@ThomasWard clarification and explanation : if Ajax match points < United match points then Thomas reputation points + 159000 ! :D :D :D

RPi Awesomeness

@NathanOsman Sweet. Thanks again!

Sumeet Deshmukh

5:17 PM

i.stack.imgur.com/8l34w.png @Avery is this gonna affect my installation in anyway?

Avery

@SumeetDeshmukh unlikely

Sumeet Deshmukh

@Avery huh, peace of mind. thanks for making me try this stuff :)

Avery

hey, I'm not making anyone do anything :P

Rinzwind

@ThomasWard yo

Avery

(I know that the thanks now will turn into swearing later when OS breaks randomly, heh)

Sumeet Deshmukh

5:20 PM

@Avery yes, but thanks for saying that it's easy

Rinzwind

@cl-netbox if ajax looses I will downvote 159000 answers

Sumeet Deshmukh

@Avery that's the strategy for blaming other people in poor decisions || but it's not gonna break easily, is it?

Avery

I didn't have my setup break yet

or at least in a way that I can't fix

Sumeet Deshmukh

@Avery anyways i've dual booted it with Ubuntu so apparently i'm safe

Avery

ah, that's nice

cl-netbox

5:25 PM

@Rinzwind hahaha ... then let's all hope that Ajax wins ! :D :D :D

Avery

Questions, questions... should I write decent code or a dirty hack?

obligatory 🤔

jokerdino

yes

Rinzwind

@Avery go for the "decent hack"

Avery

@Rinzwind can't think of a decent hack

thing is, none of the system status report tools are working for us so I've made one myself and am thinking on how I should display the data, and I have no idea how to make a decent hack

Rinzwind

0

Q: Running 32-bit prorgram with 64-bit Unbuntu 13.04

I have looked and tried all the on-line suggestions for running 32-bit programs on 64-bit ubuntu and none have worked. I keep getting "dependencies" still needed to install other i386 requirements etc... I have tried: sudo dpkg --add-architecture i386 I have tried: sudo apt-get update sudo ap...

software-installation

nuke!

Avery

5:40 PM

with a dirty hack... I'd store stuff in files and just read from there

with a decent code, I'd need to set up a database (sqlite probably) but I hate sqlite

David Foerster

@Avery: How much information is there two store and how complex is it (i. e. how many records and database tables would you create typically or ideally).

cl-netbox

@Rinzwind done ! :)

Avery

@DavidFoerster 7 rows, one record added every minute, one table.

David Foerster

@Avery Over how long (i. e. how many records in total), how often are you going to read the records and in what manner (sequential/bulk or random-access)?

Avery

I might rotate the stuff daily, it'll be sequential and bulk, i'll read it... everytime dashboard is opened, which is like, kinda rare but also not.

agh

I dropped in linux discord to rant about yaourt being displayed as example on emojione, had an editor war, DE war and we're now arguing if arch is bloated or not.

:thinking:

Rinzwind

6:07 PM

@cl-netbox advice from police: do not come to amsterdam. 150000 people already there on the main squares in amsterdam

Avery

@Rinzwind why exactly? I had someone say that too, but why are people out?

Rinzwind

@Avery UEFA cup final starts in 20 minutes. Ajax is in it

Avery

ah

David Foerster

@Avery a comma-separated text file or depending on the data even a binary record list file should be fine in that case. Don't overcomplicate things with a relational database if you don't even have relations.

Rinzwind

Ajax could be the 1st team ever to win all 5 different cups the UEFA had/has
(the old 3 are:europa cup 1, 2 and 3. The new 2 are: Champions league. And now the UEFA cup)

David Foerster

6:11 PM

"I don't need a girlfriend. I'm a DBA. I have more than enough relationships to handle already."

11

Rinzwind

24 years ago on -this- day Kluivert scored the winner in the CL final.
His son is now part of the main squad today so he could do the same :D

@DavidFoerster so true

and when I need children I start apache :=D

Nathan Osman

@DavidFoerster There are so many good DBA jokes...

Rinzwind

When did God create the DBA ? The day before he had his rights revoked.

Nathan Osman

There is a definite correlation between temperature and humidity:

No idea if the humidity sensor is accurate - I have nothing to callibrate it with.

Avery

@NathanOsman what do you use to visulize that data?

Rinzwind

6:19 PM

ok BBL.turning on beamer to watch the game :=D

Nathan Osman

@Avery Grafana.

Avery

and nice I don't need to deal with setting up mu own dashboard probably \o/

David Foerster

@NathanOsman Of course. Relative humidity decreases when temperature increases and absolute humidity stagnates.

Nathan Osman

See, I learned something new today :D

David Foerster

I'm going to make a huge tomato salad for dinner. It appears the Netherlands are dumping all their tomatoes and now they're only 0.75 €/kg.

I wish I hadn't cut the tip of my right digit earlier. Tomato juice stings in wounds. :-/

Good thing I have a grind stone and thus can reduce the juice leaks to a minimum.

Jacob Vlijm

6:42 PM

@Rinzwind good luck :)

Zanna

@DavidFoerster by using a supersharp knife?

David Foerster

@Zanna exactly

Zanna

Sounds yummy. I got some tomatoes today. Going to make a fritata and spicy tomato sauce

Sergiy Kolodyazhnyy

7:13 PM

freakin allergy is driving me up the wall

@Zanna sorry, which question are we talking about ?

David Foerster

@SergiyKolodyazhnyy floor allergy? ;-]

Sergiy Kolodyazhnyy

7:24 PM

@DavidFoerster yeah, the tiles make me sneeze, haha

But in all seriousness, I've no idea what causes my allergy

David Foerster

Did you ever take an allergy test?

Sergiy Kolodyazhnyy

I've been living in Colorado for almost 10 years, and had the allergy for whatever many years

@DavidFoerster too broke for that

David Foerster

Is it limited to certain seasons or weather conditions?

Did you live in the same house the whole time since you moved to Colorado?

Sergiy Kolodyazhnyy

more active in spring and summer but over all, it seems to constantly be therr

David Foerster

Did you live in North America before that?

Sergiy Kolodyazhnyy

7:27 PM

@DavidFoerster same house, same rooms . . .

@DavidFoerster never before

David Foerster

Could be related to something in the house then, e. g. mite excrement or fungi spores.

Sergiy Kolodyazhnyy

I tend to think it's related to plants growing nearby, because I do have seizures outside the house, on my college campus occasionally

but yeah, could be the house

David Foerster

There are charts with clinically relevant allergy provokers and their typical intensities throughout the year. You could start with that to look for possible correlations.

Also, how expensive could that allergy test be? I just did one and the doctor can bill a public health insurance 200–300 € for that.

It's probably not even an allergy but a different kind of auto-immune disease but he had one done on the off chance that it's a rare allergy with the same symptoms as the far more likely alternative.

Avery

@NathanOsman what data source do you use exactly

Nathan Osman

7:43 PM

I bought a temperature / humidity sensor and connected it to an Arduino. I wrote a program to sample the sensor and send the current values over serial to a connected Raspberry Pi. A program I wrote for the Pi then takes those values and pushes them to InfluxDB.

Avery

ah

Sergiy Kolodyazhnyy

@NathanOsman fancy. By the way, my sd card is apparently a toast, but the raspberry is fine

Zanna

@SergiyKolodyazhnyy this one

Avery

aghhhhh

why does no one ever supply non-amd64 binaries ever

you know, I'm just too lazy to deal with compiling that

Seth

@Avery Package it for them in a PPA :)

Or create a job on the openSUSE build service.

Sergiy Kolodyazhnyy

7:56 PM

@Zanna yeah, i answered and commented on it like two days ago. It's recent thing

Avery

I'll do it the easy way

aka "spend bizspark money so former startup can yell"

Nathan Osman

Lol.

Avery

as with my great naming scheme, that's ao3, though I have 6 machines. Fun.

Nathan Osman

I really need to overclock this Pi...

I forgot how slow these things were.

Avery

arm is slow in general

user136984

8:08 PM

@ByteCommander: It's been a while since I heard anything about Powerwolf having a new album. Is everything ok with them or have I just been missing their activity? :)

Byte Commander

/shrug

user136984

I see, you haven't heard anything either then.

Byte Commander

Can't tell you any more than what you will find on powerwolf.net

user136984

By the way, I was attacked by a squirrel today because he climbed up me and I prevented him with my hand from climbing up underneath my shirt... :D

Byte Commander

o.O

You seem to attract quite a lot of unusual things... malware, bugs, pigeons, now squirrels...

user136984

8:12 PM

Did I tell you that I tried to sit on a smallish hedge and fell right through it onto the ground where some particularity stern old women just happened to be walking by? :D

user136984

Plus a few weeks ago my soup just suddenly exploded out of my bag for no apparent reason onto my friend and I...

Zanna

@SergiyKolodyazhnyy two days is years in AU addicted time

user136984

I have just got used to the fact that bad comedy follows me around relentlessly. :P

Thomas Ward

@Rinzwind WannaCrypt email sample. Give. ITSec "Prod the Virus and Play with It" time in a lab environment.

user136984

If something bad and strange can happen, it will happen to me.

user136984

8:14 PM

I think it's probably just a mixture between bad karma and some god's sense of humour as well as my own.

user136984

:D

Avery

Zanna

@DavidFoerster thanks for adding to my answer to make it address the question more directly :D I changed the original loop back to a one-liner to show both ways of arranging it and take up less space

Sergiy Kolodyazhnyy

got +10 for one answer and -10 because user was removed . . . so far so good . . . question mark . . . .

Seth

TheWanderer

8:25 PM

YAY

I HAVE OFFICIAL LINEAGEOS FOR MY TABLET

Nathan Osman

Cool.

Zanna

@Seth so well drawn!

TheWanderer

why do they call them nightlies if they're weeklies though?

Nathan Osman

Random fact of the day: on Mercury, nightlies would be equivalent to one release every two months.

TheWanderer

k

Nathan Osman

8:30 PM

You're welcome.

TheWanderer

Sir Pedant has arrivéd!

Nathan Osman

At your service.

TheWanderer

:p

o_O

still parses ^

Nathan Osman

Yes, It's still on my TODO list.

TheWanderer

tsk tsk

David Foerster

8:33 PM

@NathanOsman Two Microsoft patch cycles per day.

TheWanderer

lel

Nathan Osman

Thanks to yesterday, our chat Twitter account has nearly two weeks worth of content queued.

Avery

@NathanOsman how does your database scheme look like?

or rather, how do you push the data?

Nathan Osman

I wrote an app to do it: github.com/nathan-osman/thsat

The actual pushing part happens here: github.com/nathan-osman/thsat/blob/master/src/influxdb.cpp#L44

user136984

@NathanOsman: Remind me again how you filter the content?

Nathan Osman

8:45 PM

@ParanoidPanda Which content?

user136984

The content that gets queued.

user136984

What is the criteria that is for it being Tweeted? Or does it all get Tweeted?

Nathan Osman

It is hand-picked.

user136984

Which Twitter account is it again?

Seth

Ask Ubuntu Chat

@ChattyCapybaras, Stack Exchange HQ

Random. Funny. Weird. Wise. Ask Ubuntu chat. Come join us in room 201! (attr. https://t.co/w1vFXRbQZV)

230 tweets, 18 followers, following 9 users

user136984

8:49 PM

@Seth: Thanks :)

Byte Commander

You should set something up like twitter.com/burnedyourtweet @NathanOsman

Nathan Osman

No, that's too much of a fire risk.

user136984

Duck!

user136984

So funny to see that there... :D

Nathan Osman

8:58 PM

It's not the first time we've seen that one..

user136984

PSA: we are permanently closing this account in favor of opening accounts on Reddit and Instagram. So long and thanks for all the fish! 😉

Tweeted by ChattyCapybaras on March 31, 2017 at 9:53 PM

user136984

Was that a joke? Because you carried on posting to it...

Nathan Osman

@ParanoidPanda Look closely at the date.

TheWanderer

ugh I have to update to Nougat though

user136984

@NathanOsman: It says it was on the 31st.

Nathan Osman

9:02 PM

In other timezones, it was April 1 :D

user136984

That makes it extra funny! :D

TheWanderer

oh that was actually kind of painless

Avery

@NathanOsman agh, can you give me a hand on configuring grafana? I just can't get it to display the data.

user136984

@ByteCommander Sounds like your duck population might get rather out of control... :P

user136984

And don't ask how I randomly found that... :P

TheWanderer

9:06 PM

>_>

Byte Commander

...

Nathan Osman

@Avery What's up?

user136984

And another ducky highlight:

user136984

Jun 23 '16 at 20:19, by Serg

"Rate my duck" thread on 4chan, literally rating the ducks people breed O.o

user136984

I must now stop searching this room for duck related things... :P

TheWanderer

9:08 PM

o_O

@NathanOsman ^

Nathan Osman

ಠ_ಠ

TheWanderer

:)

Avery

@NathanOsman the documentation on neither sites is good enough from what I've seen, and 1) i'm not sure how exactly I should form the database (it's just cpu, ram and hard drive percentages) 2) probably due to #1, I can't find a way to show the data on a dashboard on grafana

user136984

:D

Nathan Osman

@Avery What are you using to collect the data and deliver it to InfluxDB? Telegraf?

Avery

9:09 PM

own script

user136984

It feels like a good time for somebody to post a large ASCII duck... :P

Avery

the premade stuff doesn't work for some reason

Seth

you're still searching the transcript for duck stuff panda?

user136984

@Seth: Yes, and now they've become a really nice and special thing for me.

Nathan Osman

@Avery Do the databases you're pushing to and using in Grafana match?

user136984

9:10 PM

I just love everything about them! :D

Avery

Yes

Nathan Osman

Do any of the metrics show in the query editor?

user136984

They're so fat and waddley and yellow and make such a cute little noise! :D

Nathan Osman

...until the food makes its way through their digestive system...

Avery

the rows? yes

Nathan Osman

9:11 PM

Okay, but the data doesn't show up?

(I assume you're using a graph.)

Avery

Tried something else, sec

I'm pushing report cpu_percentage=72,ram_percentage=58,download=23,upload=3 $(date +%s) and trying to read like this and I'm not sure what's the issue here, probably both.

Nathan Osman

@Avery You can omit the date part - it uses the current timestamp by default.

That might be the problem since InfluxDB uses nanoseconds by default IIRC.

Avery

what do you know

that might've worked

Nathan Osman

\o/

user136984

9:33 PM

                           ,..--------...
                     ,.--'|              /''-..
                 ,-''      \            /      `-.
              ,-'           \          /          `-.
            ,'               |        /              `.
          ,'                 .       /                 '
         ,\_              _,,'-------`._             ,- `.
        /   `._       .-''              `-.        ,'     \
      ,'       `._ _,'                     `.   ,-'        \
     /           .'                          `\'            \____

user136984

:D :D :D

user136984

Source

Byte Commander

Just had this review audit... an ASCII trollface codeblock... askubuntu.com/review/low-quality-posts/715050

user136984

@ByteCommander: Hahaha! :D

user136984

Maybe if I posted that duck as an answer it would get deleted and become a review audit... >;P

Byte Commander

9:38 PM

This guy posted one rather bloated answer (I think most of it is unformatted and unnecessary terminal output though...) and then posted a bunch of answers just containing links to that first one...

Maybe someone should look into that

user136984

Anyway

user136984

Goodnight folks! :)

user136984

Ducks out of room... :P

Avery

@NathanOsman hmm, have any idea why the lines don't work?

ahh, it's about the fill thing

Avery

10:14 PM

end result

Nathan Osman

Cool.

^--- pretty similar to what I have

Ubuntu Questions on U&L

0

Q: scp files from particular folder in parallel

I want to scp files from machineA into my machineB and this is how I am doing it. I am copying bunch of files one by one from primary folder of machineA to primary folder of machineB and secondary folder of machineA to secondary folder of machineB. trinity@machineB:~$ scp trinity@machineA:/data0...

linux bash ubuntu scp

TheWanderer

10:41 PM

@Avery cuz ur an scrub

Avery

ok

TheWanderer

yehs

chaskes

@ParanoidPanda Just checked the OpenWeather extension in a fresh install (without Extend Settings) and it does provide a setting for the location on the top bar on its own.

Avery

11:27 PM

this is what we ended up with

(the storage and ram freakout is due to me accidentally forgetting it open on testing environment)

TheWanderer

halp

oh there it goes

Transcript for