Ask Ubuntu General Room

Nathan Osman

12:04 AM

Does anyone know how to get analog loopback working with Intel audio?

I have a piano connected via line-in and I have loopback enabled in alsamixer but I can't hear anything.

Audacity can record the audio and I can play it back.

But no live loopback.

Mateo

ah the fun of trying to run something in a container that is root that dosn't have sudo, and everything making assumptions about the environment...

edwinksl

docker container?

Mateo

libertine

so far I have been able to edit out the "sudo" and checks for being root in the scripts ;)

It probably won't work, but I'm installing this on my ubuntu tablet - github.com/MycroftAI/mycroft-core

although I'm not sure if the container can access the mic in any way?

huh

it double posted, then I deleted one of the messages, both gone?

CodeX

it shows one gone

Mateo

strange

I saw two for a sec...

CodeX

12:18 AM

javascript

Mateo

anyway, saying it might just work if sound was made to work

Mateo

12:31 AM

might need a sd card, running out of spase with these containers

Ubuntu Questions on U&L

0

Q: how to configure WIFI on debian (wpa_supplicant and WICD)

I installed Debian and found that WICD doesn't when connecting to my WIFI. Specifically, it says Validating Authentication and finally not connected at the bottom of the WICD window. So after a long battle I changed /etc/network/interfaces to this: # This file describes the network interfaces a...

Mateo

@NathanOsman something like alsaloop commandline tool

Nathan Osman

Wut.

Here's the two commands that got it working:

sudo alsactl kill quit
sudo alsactl init

Super weird.

Mateo

huh

needed to be restarted?

aw, looks like this script is compiling stuff... this will take awhile

Serg

12:52 AM

o/ hi chat

Mateo

aw

guess it isn't close enough to a real system...

edwinksl

what up serg

Edity

1:09 AM

hmm getting a gpu lockup in ubuntu (latest ver) any suggestions?

edwinksl

what gpu?

Edity

graphics card lockup

might be because of amd... O_o

for ubuntu's sake amd

FOR UBUNTU'S

mmm, drunklisious.

Videonauth

@edwinksl @Serg without telling me the solution, can you look at my script and tell me what i do wrong syntactically? paste.ubuntu.com/19035637

edwinksl

1:24 AM

i got a MemoryError when i ran your code

Videonauth

yeah and pycharm outputs only the adress of the genrator object to me

uh i guess that list is a bit big

mhmmmm seems I have to try a different approach

is there a sizeof function in python ?

edwinksl

len?

Videonauth

na, in c++ sizeof returns the bytes for a data type

example: typeof(int) returns 4

think i simply need another approach

Zacharee1

@ParanoidPanda I'm in tears

and the subtle Linux product placement, nice

Videonauth

1:45 AM

yep the sieve runs into MemoryError, I guess its simply to big

Zacharee1

These Angry Birds Toons are great

Videonauth

anyways the script as well does not return a full list of prime factors of the smaller number

so its wrong anyways

IanC

guys, can I get the sha256 fingerprints using ssh-keygen?

I need to compare the one I got with a sha256 fingerprint :/

Serg

2:01 AM

@Videonauth. Can't point out what is wrong but consider using sieve of Eratosthenes. There's plenty of solutions online. I'll keep looking at it, but my Mind isn't clearest right niw

Videonauth

well it is a sieve of erastotenes and then i try to factorize

but for the number i want to calculate i run out of memory

Mateo

ooo, this could be a game changer:

guess what that is

Videonauth

A cable clip ?

Mateo

hm

maybe not what I though it was

Videonauth

what is it ?

Mateo

2:10 AM

a bag sealer

Videonauth

well i wasn't far of with my guess :P

Mateo

I was thinking it was to press down on ziplock's, looks more like it will hold a rolled bag

we will see...

if it isn't I will have some chip bag clips, and will have to design my own because I'm not really seeing anything existing what I want to do

although this would be the next step up - associatedbag.com/… was really wanting something hand-held and inexpensive

Videonauth

mhmmm for what use you want it ?

Mateo

closing many bags ;)

Videonauth

ok sec

images-eu.ssl-images-amazon.com/images/I/… and a firm surface is the quickest

its normaly meant for tapestry

Mateo

2:26 AM

not bad - some have tried a spatula, but it is also food safety so needs to be something more purpose built

anyway getting off topic ;) but thanks for the help

Videonauth

ah ok, well when have we been really on topic in here ?

Mateo

true

Videonauth

as long im on the site not often ;)

@serg i found a solution but it is not very elegant

just looked through the solutions posted

edwinksl

ubuntinator ;D askubuntu.com/users/566864/ubuntinator

2

Mateo

so, was kind of thinking something like this:

hold like tongs and slide through

Videonauth

2:32 AM

if you have a 3d printer print it out and test it if it works

Mateo

that is the other problem

I might think it out and send a few to shapeways though

Videonauth

:) well there you got me in a field i know really lots about, im a trained cnc technican

:)

Mateo

cool

Videonauth

rapid prototyping ot 3d printing i think is the pastest way to test if a design works

Mateo

yeah, I need to get at least a makerbot or something one day

Videonauth

2:36 AM

and cheaper as if you produce it on the conventional way

Mateo

the 3d-doodler is nice for fixing some things, it might work for this project if I make something similar to that pic

I have one of those

maybe use some existing flat pieces for the important part ;)

Journeyman Geek

._.

Roll up the bag top + rubber band works ;p

Mateo

yeah, I think everyone else is going full on heat sealed...

If I do make one I'll put some ubuntu stickers on it to be somewhat on topic when pictures are in here ;p

Serg

3:01 AM

omgubuntu.co.uk/2016/07/someone-just-installed-unity-windows

This is too much ^

edwinksl

that thing is trending on my facebook too

Ubuntu Questions on U&L

3:13 AM

0

Q: Help needed with Raid 5 that was working OK

My parents had a Netgear RN 104 that stopped working properly, they messed with some settings, messed it up and gave it to me to fix. It has 4 x 4tb drives in Raid 5. I've used mdadm before to recreate a very simple Raid array, so I connected all 4 drives to my computer, installed mdadm in Ubuntu...

ubuntu mdadm raid5

Mateo

Prototype so far:

Complete with Ubuntu logo ;)

Looks like it will work with some tweaks

Serg

3:48 AM

what is that ?

Mateo

something I'm trying to make

to close zip bags

Nathan Osman

Where is the proper place in the filesystem for a Python web application?

/opt? /var/[app]? Something else?

Mateo

I found some in /usr/local/lib

but I don't think that is proper as far as I can remember

Serg

@NathanOsman why not in /usr/bin ?

Nathan Osman

That's for executable files.

Not web applications.

Mateo

3:59 AM

I think they want stuff in opt now

sublime is there

Nathan Osman

pathname.com/fhs

@Mateo They?

Mateo

ubuntu people

Nathan Osman

I'm not worried about them :D

I want to do the correct thing according to the FHS.

Mateo

119

Q: What is the best place to install user apps?

Occasionally I am installing application with something other than apt-get or the Package Manager. What is the "best practice" location for installing user apps? (/usr/bin/, /usr/local/bin/, /opt/, etc)

application-development software-installation

Nathan Osman

Yes, but this is a web application.

There are no executable files.

It's just Python scripts.

Mateo

4:03 AM

slap a desktop file in there ;)

Nathan Osman

It's for Docker, not a snap :D

Nathan Osman

4:14 AM

This is hilarious.

So they uploaded the code for the Apollo 11 mission to GitHub: github.com/chrislgarry/Apollo-11

2

Journeyman Geek

@NathanOsman who do you run it as?

Nathan Osman

And this bug is full of gold: github.com/chrislgarry/Apollo-11/issues/3

3

@JourneymanGeek The web app or the Apollo 11 source code?

Journeyman Geek

I tend to stick em in the home directory of a user I create to run it

@NathanOsman yes,

The former

Nathan Osman

It's running as root.

(It's in a Docker container.)

Journeyman Geek

er. eww eww eww.

oh

Nathan Osman

4:15 AM

Yeah, no I don't generally run stuff as root :D

Journeyman Geek

still ewwish.

Nathan Osman

But it's okay in Docker since the container is isolated from the host.

It's like a lightweight VM.

Journeyman Geek

but its a docker container, who gives a shit? ;p

@NathanOsman but if someone gains control of the docker container...

or something.

Nathan Osman

The container filesystem is readonly.

If someone compromises it, I just restart the container. Bam. Everything is the way it was before.

Serg

AFAIK user has to be in docker group to do anything, Right?

Nathan Osman

4:34 AM

github.com/chrislgarry/Apollo-11/…

So. Much. Humor.

Ubuntu Questions on U&L

1

Q: How to Configure CGI in Ubuntu?

I am very new to Apache in Ubuntu. I recently installed Apache2 on Ubuntu and I am trying to configure CGI. I added the following lines in apache2.conf file: ScriptAlias /cgi-bin/ /home/router/cgi-bin/ <Directory /home/router/cgi-bin/> Options ExecCGI AddHandler cgi-script cgi pl

ubuntu cgi

0

Q: Dual boot Linux on Windows 10

I just burned Ubuntu 16 to a CD. Is this considered dual booting since I can go back and forth to Windows and Ubuntu?

ubuntu dual-boot

Nathan Osman

3

LOL.

edwinksl

matt damon needs to be saved!

PR needs to get merged asap

wut github.com/chrislgarry/Apollo-11/issues/53

Serg

Look what whois google.com brought up

   Server Name: GOOGLE.COM.SUCKS.FIND.CRACKZ.WITH.SEARCH.GULLI.COM
   IP Address: 80.190.192.24
   Registrar: COREHUB, S.R.L.
   Whois Server: whois.corehub.net
   Referral URL: corehub.net

there's whole bunch of domains like that

SmokeDetector

5:06 AM

[ SmokeDetector ] Bad keyword in title, link at end of body, link following arrow in body, pattern-matching website in body: The Simplest Way To Create Chest Muscle? by Perreatdre on askubuntu.com …

edwinksl

5:16 AM

lol how did you encounter them in the first place

Serg

5:30 AM

@edwinksl I just . . . . typed whois google.com . . . .It basically looks up all registered domains and apparently there are some funny domains registered that start with google.com

I am actually going to be working on a script that will generate info on all IP address that has established connection with my laptop

Just in case I ever wanna find out who's looking at my p0rn

On a side note, anybody has a laptop ? I need helpz testing somezing

find /sys/devices/  -type f -iname "type" -exec grep -l -i 'battery' {} 2> /dev/null +

Byte Commander

Heya! o/

Serg

\o hello mr. BC

Byte Commander

   Server Name: GOOGLE.COM.SPAMMING.IS.UNETHICAL.PLEASE.STOP.THEM.HUAXUEERBAN.COM
   IP Address: 211.64.175.67
   IP Address: 211.64.175.66
   Registrar: GOOGLE INC.
   Whois Server: whois.google.com
   Referral URL: domains.google.com

edwinksl

i haz lappy

Byte Commander

We should link to that one from now on ^

edwinksl

5:38 AM

/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0A:00/power_supply/BAT0/type

@Serg

Byte Commander

(does not work though)

Serg

@ByteCommander yeah, i saw that one , lol'able domain

@ByteCommander do you have a laptop ?

Byte Commander

Yup.

SmokeDetector

[ SmokeDetector ] Bad keyword in title, link at end of body, link following arrow in body, pattern-matching website in body: Building Muscle Tissue Quickly Without Steroids? by ClintMckaye on askubuntu.com …

Byte Commander

   Server Name: GOOGLE.COM.LOLOLOLOLOL.SHTHEAD.COM
   IP Address: 123.123.123.123
   Registrar: CRAZY DOMAINS FZ-LLC
   Whois Server: whois.crazydomains.com
   Referral URL: crazydomains.com

xD

And that IP address...

Serg

5:40 AM

Notbad.png , trolling level over 9000

@ByteCommander find /sys/devices/ -type f -iname "type" -exec grep -l -i 'battery' {} 2> /dev/null +

Does that give you only one file name ?

Byte Commander

ARGV

I'm attacked by a fly.

edwinksl

fsck

Serg

sudo smack_that

Byte Commander

Getting out the fly swatter for a counterstrike... >:/

Serg

wait, that came out wrong XD

Byte Commander

5:42 AM

Hm?

$ find /sys/devices/ -type f -iname "type" -exec grep -l -i 'battery' {} 2> /dev/null +
/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:18/PNP0C09:00/PNP0C0A:00/power_supply/BAT0/type

edwinksl

i am confuciused

Byte Commander

To many PNP... folders for my taste...

Serg

Well, I have to use those thingies, because in /sys/class directory there's waaaay to many symlinks and it breaks find command

I think i'm going to post another version of that battery script , to automate finding the BAT device, because it can either be BAT1 or BAT0 , but i probably will do it in python , to make it moar challengang

edwinksl

i don't understand why noobs keep having /usr/local/bin/python. do they really need to install their own pythons? :/

Serg

@edwinksl it has to be installed on Windoze so they probably assume they need to do the same on Ubantu

edwinksl

5:52 AM

@Serg see stackoverflow.com/questions/38298196/…

SmokeDetector

[ SmokeDetector ] Link at end of body, pattern-matching website in body: With this particular one-time by user566911 on askubuntu.com …

[ SmokeDetector ] Manually reported answer: Envy 4500 printer not scanning by user231054 on askubuntu.com …

edwinksl

serg is always right :)

SmokeDetector

[ SmokeDetector ] Manually reported answer: Envy 4500 printer not scanning by SEO Ganesh on askubuntu.com …

edwinksl

lol SEO

Serg

#SergIsRight

3

Meawhile, today I am lurking on 2ch.hk/b/ , it's russian chan site

Aaaand watching videos about deep web :p

edwinksl

6:09 AM

so basically just a regular night in colorado

Serg

basically , yes

edwinksl

i wonder if how the number of bash scripts written by serg compares with number of python scripts written by jacob

Serg

probably I'm lagging behind, since Jacob has been on this site for 3 years, way before i came around

Also, he slightly wins in quality.

Ubuntu Questions on U&L

6:36 AM

0

Q: nvidia-prime doesn't disable intel video card

Elementary OS Freya (ubuntu 14.04 x64), nvidia-355 proprietary driver from ppa:graphics-drivers/ppa. cat /proc/acpi/bbswitch returns 0000:01:00.0 OFF When in nvidia-settings Intel enabled. But powertop returns 100,0% PCI Device: NVIDIA Corporation GF119M [GeForce 610M] I tried ...

ubuntu nvidia elementary-os optimus

0

Q: How to make display all the environmental stored in my unix?

Is there any command to display all the Environmental variables stored in my unix?

ubuntu

Rinzwind

Better late than never askubuntu.com/help/badges/73/10-04

edwinksl

10.04 ._.

Jacob Vlijm

@Serg @Serg, I just coincidentally read that. I think we are both creative persons, but with you the priority is more towards being creative. People write according their personality. Your priority is finding new ways, which you do. On a sub consious level you accept the fact that every now and then a script might not be totally practical, for the sake of the new found method(s).

With me the balance is slightly different. Different, but you cannot say which is better. Both are needed. This is my honest opinion.

Serg

Very interesting . I never considered creativity as my strong trait, but to some extend you're right - I like finding new ways of doing things.

Ubuntu Questions on U&L

6:58 AM

-3

Q: Is there an operating system named Linux

how can install xampp in Linux ubuntu 15.10 with 32 bit operating system

linux ubuntu xampp

Jos

guys, what is a bash command that does exactly nothing?

Let's say I have a script if [[ xxx ]] then echo foo else echo bar but I decide I don't want to see foo, only bar. I can't just comment out "echo foo" or bash will complain.

I could do echo foo > /dev/null but there must be something more elegant for this situation.

Serg

You're looking for :

It basically same as true

DIR:/xieerqi|01:03|skolodya@ubuntu:
$ :

DIR:/xieerqi|01:03|skolodya@ubuntu:
$ true

DIR:/xieerqi|01:03|skolodya@ubuntu:
$

Or just reverse your if statement

Jos

Yep, that works

Serg

What is xxx supposed to be ?

a string ?

Jos

it's a string comparison, yes

checking if the router is there.

Thanks. Didn't know that : was a valid command. Of sorts.

Serg

7:05 AM

You can do something like this

if [[ "$USER" != "admin" ]] ;then  echo  "Not admin" ; fi
Not admin

Jos

Sure

SmokeDetector

[ SmokeDetector ] Bad keyword in body, pattern-matching website in body: Why Academic Essay Writing Is Very Important To The Students? by Barryd Pearce on askubuntu.com …

grooveplex

8:01 AM

Congratulations on reaching 2K rep, @Zanna!

Zanna

thanks ^_^

I lost some rep last night from going over the limit :( but a random upvote on a old answer pushed me over 2k at 14 minutes past UTC midnight ^_^

Serg

@Zanna if you mean the 200 rep ber day limit, it's not lost, it just rolls over to the next day

Jacob Vlijm

@Serg @Zanna I am afraid not, if you go over 200, it is lost :( accepts and bounties are excluded however.

Zanna

@Serg oh really? I didn't get it yet... counting the upvotes from yesterday, some has gone missing

thanks @JacobVlijm :) I better read meta SE to find out the reason for this limit

Serg

@Zanna ask Seth or another mod to review your profile. At least in my case, I never lost upvotes, they just arrive next day :p

Jacob Vlijm

8:12 AM

@Zanna it is obvious, the site wants people to mature on the site before they have power by rep.

Serg

( by never lost , i mean the 200 rep limit , i did loose a lot during the Great June Purge )

Jacob Vlijm

@Serg That must have been a recalculation because of downvotes

...The 200 (excluded accepts and bounties) stands.

Zanna

@JacobVlijm thank you for explaining, it is clear

Byte Commander

8:25 AM

Does anybody know a better alternative to the command below for exactly matching a multiline block (content of file1) in file2?

grep -aof <(tr '\n' '\0' < file1) <(tr '\n' '\0' < file2) | tr '\0' '\n'

I'm talking about this question on U&L.

Serg

@ByteCommander grep is probably not the most suitable tool since that's a line matching utility , let me see what i can do with awk , and i'll let you know

Byte Commander

@Serg There is already an awk answer: awk -v RS="$(<file1)" '{print RT}' file2

No idea what that does though.

Okay, tank time!

Serg

@ByteCommander it does kind of the same as what I had in mind . . . assign the contents of file1 as record separator variable. Then prints RT which is record terminator

Byte Commander

Sounds AWKward.

(had to use that opporTUNAty)

Serg

There's no PUNishment for that

Byte Commander

8:33 AM

I better go drive some tanks now...

... while listening to heavy metal on the web radio of course.

Serg

@ByteCommander found better solution with grep , but i cannot read it from filie

i mean file1

Byte Commander

Tell me?

terdon

@ByteCommander pcregrep

Serg

$ grep -Pzo "A B\nC D\nE F"  file2.txt
A B
C D
E F

well , maybe -P was overkill

Byte Commander

But you must read from the file.

Serg

8:41 AM

that's my main problem !

terdon

@Serg That will match the entire file though, as long as the pattern is found, the whole file will be printed.

Serg

well, that . . .results in this:

grep -zo "$( cat  file1.txt)"  file2.txt
A BE FA BC DE FG HG H

@terdon well that file is multi-line and it prints out things properly i , it doesn't print the whole file

terdon

@Serg No, it doesn't. I completely missed the -o

Serg

my big problem is how can i read pattern from file :/

@terdon any idea on how can i turn A B\nC D\n into A B\\nC D\\n ?

terdon

$ perl -pe 's/\n/\\n/' file
A B\nC D\nE F\nG H\n

@Serg ^^

Byte Commander

8:55 AM

@terdon Why perl and not simply sed?

terdon

@ByteCommander because:

$ sed 's/\n/\\n/' file
A B
C D
E F
G H

Serg

@ByteCommander sed works on lines , so it's a bit more messy

terdon

You need to do some acrobatics to do that with sed

$ sed ':a;N;$!ba;s/\n/\\n/g' file
A B\nC D\nE F\nG H

So not very "simply" with sed at all.

Egad but I hate sed syntax.

Serg

that didn't help , by the way

Byte Commander

Oha.

What about sed -z?

terdon

8:59 AM

@Serg I didn't really expect it to. I was wondering why you wanted that.

@ByteCommander Oh, true, GNU sed can do that. Still, it's no simpler or faster than perl

Journeyman Geek

hmm

@terdon askubuntu.com/users/541381/areil-bart spammer

Serg

I have perfectly nice working grep solution for multi-line match, problem is that i cannot get pattern from file !

Journeyman Geek

(or if he's asleep, FREE FLAGS!)

terdon

@JourneymanGeek poof

As in "gone" (to avoid confusion)

Journeyman Geek

understood ;p

terdon

9:11 AM

There's always pcregrep:

$ pcregrep -Mf file2 file
A B
C D
E F

@Serg @ByteCommander ^^

Byte Commander

Must be installed first though.

I prefer on-board tools.

Serg

well , ain't nothing to do here . Show's over folks

terdon

@ByteCommander True. Also, that one won't actually work. It takes each line as a separate pattern.

Byte Commander

9:25 AM

:-/

Serg

welp, my solution goes out the window i guess

i cant read damn file1 into pattern

terdon

@Serg this might be it:

$ grep -Pzo "$(perl -pe 's/\n/\\n/g' file1)"  file2
A B
C D
E F
G H

Serg

@terdon doesn't work for me :/ no output

terdon

9:40 AM

@Serg What are your input files?

Serg

$ cat -A file
file1.txt  file2.txt
$ cat -A file1.txt
A B$
C D$
E F$
G H$
$

file2.txt is same as OP's

Two newlines

that's it!

terdon

What are all those $ doing there?

Oh, cat -A

And yes, the two newlines would do it

Serg

@terdon posted the answer with honorary mention :)

terdon

Cool :)

No need to mention the catch, that's no catch, it's normal. If the contents of file1 aren't present in file2, they won't be found. That the extra characters happen to be invisible to humans is irrelevant.

Serg

nah, it's better be mentioned, otherwise someone will be back saying "This doesn't work" and I'll be thinking well why it's not right if the file is correct. . .

it's 3:49 AM . . . i said i won't be staying up tonight . . .

gosh

Ask Ubuntu Meta

9:56 AM

0

Q: When I 'improve [an] edit' suggested by a <2k user, do they still get +2 reputation?

As of today I am allowed to review suggested edits ^_^ I'm reading lots of posts here to help me do a good job. I can be absent-minded and I'm certainly not immune to typos, bad formatting decisions, or omissions myself, but when reviewing I am doing my best to be focused and critical, so I am ...

support

jokerdino

@AskUbuntuMeta yes

but how did you get 2k? I don't remember you being that close to the milestone.

Zanna

thanks! is that a pointless question? should I just delete it?
how did I get 2k... lots of work-avoidance yesterday!

jokerdino

Don't have to delete the question. I don't think many people would actually know the answer.

Work on Sunday? SadFace

terdon

@Zanna Well done!

I guess... ;)

Zanna

@terdon thanks! @jokerdino it's the crunch, 4 more days and I can resume my life from suspend :)

jokerdino

10:13 AM

Ah. hang in there.

Zanna

:)

Serg

10:34 AM

@ThomasW. Have you ever read this book and what would your suggestion be on getting or not getting it . I mean, is it going to be generally beneficial for learning python via pentesting book ?

Ubuntu Questions on U&L

0

Q: Warning because addgroup tries to create an already existing user group

I am trying to run the command dpkg --configure -a in order to fix dpkg so I can apt-get programs. I get the error addgroup: The group 'systemd-journal' already exists as a system group. Exiting. This apparantly coresponds to the following bug. https://bugs.launchpad.net/ubuntu/+source/syst...

ubuntu dpkg

Thomas W.

11:05 AM

@Serg How well do you know Python? That book is for the intermediate-level - if you don't know Python then the book won't help (mind you I haven't read the book)

Serg

@ThomasW. been doing data structures ( stacks, linked lists, dijkstra's algorithm,etc ) , some scripts here and there on AU . I don

I don't quite know my level tbh

But I am looking for ways to bump the level up

5:10 AM

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