Ask Ubuntu General Room

Nathan Osman

05:41

Wow, it's hard to find a good optocoupler on Amazon.

RolandiXor

05:53

@Fabby thanks for recommending me ^_^

I can't (yet) take international requests (for payment) so even if your cousin picks me, I'd only be able to volunteer my efforts.

Fabby

08:26

@RolandiXor I'll warn her... (I was impressed by your web site)

She has a company so she' ll need an invoice.

@RolandiXor (Why not use BitCoin for international orders?)

Zanna

@towc you know /sys is not a real filesystem right? It's just a peek into the kernel. The stuff in there is not files.

Videonauth

@Zanna everything is a file ;)

terdon

10:01

@Melebius @user68186 @guiverc @N0rbert @DKBose this question is actually on topic:

0

Q: Can I use Canonical Livepatch in non debian-based Linux?

Can I use Canonical Livepatch on my Arch Linux Desktop? I have look around and I can't see a detailed list about which OS are really supported. I have found that only debian-based have installed this using Snap from the Users by distribution section on https://snapcraft.io/canonical-livepatch....

I completely understand why you would think it isn't, but we do support Canonical tools, so a question about how those tools work should be on topic according to the help center:

2

askubuntu.com/help/on-topic: "Services provided by Ubuntu and Canonical."

That's my understanding, anyway.

Melebius

10:20

@terdon To be honest, I hadn’t thought about it in this way before. However, I understand and accept your explanation.

Fabby

10:33

we bow to the wisdom of @terdon

;-) >:-)

terdon

10:44

@Melebius to be honest, neither had I :) I'm open to corrections, but my understanding is that we provide support for anything coming from canonical. I might have to open a meta post about this though.

Zanna

I think there was something about this before in relation to MaaS?

Fabby

If you want to document this for posterity: please Q&A because your resoning makes sense...

Rinzwind

11:23

@terdon we do.

Debian can use Kernelcare (also a paid solution)

Journeyman Geek

I need to set that up ;p

Fabby

@JourneymanGeek For your computers of fo your brain? ;-) :P

(I wish I could set that up for my brain!)

Journeyman Geek

(I have a ubuntu linux router now, and live kernel updates would be handy ;) )

Fabby

11:38

Woohoo! :-)

Journeyman Geek

Still lots to do, I still gotta work out IPv6 (I am having a hell of a time with that), QOS (fireqos seems nice) and maybe some nice graphs (netdata seems good)

terdon

@Rinzwind That's what I thought but I couldn't find anything on meta specifically dealing with running Canonical tools on non-Ubuntu systems.

Rinzwind

@terdon Oli said so a couple of times

Journeyman Geek

@terdon IIRC that storage/cloud thing on windows was supported on AU

terdon

Yes, that's what I remember, I just can't find an actual discussion on meta that I can point users to.

Rinzwind

11:42

@JourneymanGeek WSL. Unfortunatly

terdon

It is a very understandable confusion.

Journeyman Geek

@Rinzwind ah zat too

Fabby

@Rinzwind WSL is better than dual boot if you just want bash on a corporate laptop...

(that's what I use it for)

Rinzwind

12:05

@Fabby tsk.

Fabby

@Rinzwind Better than W10 host and an Ubuntu VM! :P ;-)

Driving.. BBL8R.

PerlDuck

12:37

Did you notice that moron who keeps telling people should remove /usr/bin/sudo when it asks for a password?

Jos

12:50

Did you notice this question about a process using 100% CPU? That turned out to be cryptomining malware.

3

Q: '/etc/.a/kernelupd /etc/.a/.cf --daemonized' Using 100% CPU

I found this process which uses all CPU Power: /etc/.a/kernel upc /etc/.a/.cf --daemonized I have not started this myself, what is this? It seems to be a kernel update, but as I said. I did not start this. Maybe this is caused by canonical live update? htop screenshot

kernel cpu-load

Scary stuff.

Zanna

why are those files owned by their user?

they should not have had permission to write files there

Jos

Good question. We don´t know where he got this stuff

Zanna

hmm

terdon

13:08

@PerlDuck ?

Never mind, found it.

Fabby

@PerlDuck No, link???

@Jos Interesting...

First malware on Linux?

Jos

13:24

I have never seen something like it.

He must have got it through a browser extension.

Fabby

@Jos I was pretty good at manually removing Malware 15 years ago...

(haven't needed it since then; user did not have a backup)

:47532600 Downvote and delete vote cast.

looking into the other posts...

:47532600 Just a beginning cowboy on Ubuntu...

PerlDuck

13:39

@Fabby Yes, perhaps you are right. Sometimes I feel sorry for guys like him. I mean, he obviously doesn't understand how sudo and/or su work (and work together) but tries hard to help other people. According to his knowledge.

Fabby

Knows enough to get into trouble, not enough to get out of trouble!

@PerlDuck (reminds me of myself when I was 14 and didn't have a computer and was only allowed short bursts on other people's computers)

(back when you'd allow someone else on your computer)

PerlDuck

@Fabby :-) Well put.

... and now he feels the full impact of the meta effect.

Fabby

Ah? switching to meta.

PerlDuck

Oh, no, I was wrong. Forget it. I confused the "meta effect" with the "chat effect".

Fabby

@PerlDuck :D ;-)

In one of his answers he's referring people to actual documentation, so seems like he reads, so this behavious should go away all by itself in the near future.

PerlDuck

13:44

but same thing: when a post is mentioned on meta (or in chat) then it suddenly receives attention.

Fabby

Point him to documentation in the future...

We've all been 14 and stupid!

:D ;-)

PerlDuck

Yes, but when I was 14 I didn't get downvotes visible all over the world.

Fabby

14:40

@PerlDuck That's because when you were 14 the Internet was still called DARPAnet.

:P ;-)

Fabby

14:59

To all Unix & Linux members: I need one more reopen vote

And one additional DV needed here

Ubuntu Questions on U&L

15:33

0

Q: Log Console Output

Is there a way to not only protocol/log the console inputs (like the history), but also the console output by default (without the constant usage of pipes)?

ubuntu terminal logs console terminal-emulator

Ask Ubuntu Meta

0

Q: Reputation points and badges not incremented

My reputation points and badges suddenly stopped increasing on askubuntu... I have done some reviews today and I was also supposed to be awarded a gold badge for editing 500 posts. This started today. Everything was fine yesterday... How do I get all the reputation points I should have had tod...

support bug

TheWanderer

17:22

so 19.04 is apparently called Disco Dingo?

and there won't be a public alpha?

Fabby

17:40

@TheWanderer I starred that a few days ago when @Rinzwind mentioned it...

@TheWanderer Really???

TheWanderer

OMGUbuntu says so

omgubuntu.co.uk/2018/11/ubuntu-19-04-release-features

Ubuntu Questions on U&L

18:33

0

Q: Empty trash in ubuntu

I'm trying to empty my trash using the UI but it doesn't work. i tried to use this command rm -rf ~/.local/share/Trash/* but it those not success with the messages like rm: cannot remove 'file.txt': Read-only file system. any solution

ubuntu permissions rm delete

Rinzwind

19:07

@TheWanderer yes and 1st name ever I believe is stupid :=)

Ubuntu Questions on U&L

19:18

0

Q: How to receive files by bluetooth via command line headless?

I have installed several bluetooth packages: sudo apt-get install bluetooth bluez bluez-tools rfkill and then tried to serve BT: $sudo bt-obex -s /NAS/media/ScanInbox bt-obex: obex service is not found Did you forget to run obexd? The I called install sudo apt install obexd-server and i...

ubuntu bluetooth

Zanna

@TheWanderer April fool name?

dessert

19:36

@Zanna in november?

Zanna

the release will be in April

but maybe we need a November fool's day just to break the year up a bit

dessert

@Zanna „Disco“ is not an adjective though, is it? this would be the first time breaking with this tradition (yes, I checked carefully).

Zanna

it's not. But putting a noun into service as an adjective happens very casually in English without anyone even thinking "hang on, this isn't actually an adjective!", doesn't it?

but the fact that they couldn't come up with an exciting adjective beginning with D is a bit worrying

dessert

there are of course constructed forms like „Yakkety“ and „Quantal“, but formally they are adjectives

Zanna

I mean, disco just sounds like a rubbish party. Sounds like the really crappy retro music they play at UK weddings that even the bride's great grandma is too young to like

3

dessert

19:46

oh, „quantal“ actually is a thing, my bad

Zanna

I'm not sure what kind of word yakkety is... or what it means

MarianoM

Hi, my language native is spanish and my english is very bad haha

dessert

-ety

== English == === Alternative forms === -ity === Etymology === Uncertain origin. Perhaps imitative of repeated action. Compare -et, a suffix used to form diminutives. === Suffix === -ety Added to monosyllabic words, typically nouns or adjectives, to extend their form. Often seen in fanciful compounds. dig + ‎-ety → ‎diggety, hot diggety dog lick + ‎-ety → ‎lickety, lickety-split ==== References ==== === Anagrams === Tye, t'ye, tey, tye, yet...

MarianoM

reader this forum! This is excellent

Zanna

@MarianoM looks good so far :D

MarianoM

19:50

@Zanna haha so far xD. Thanks

Zanna

@dessert just for fun ^_^

MarianoM

I recommend Ubuntu or Debian to go introducing me in linux? I want to have a balance between the terminal and GUI.

Zanna

You can try both

there is no limit

MarianoM

Before migrating, it is essential for me to understand how to recover the system in case of damage to the file system.

Zanna

do you mean, you are concerned about losing your data?

Fabby

20:00

@MarianoM Desktop and server: Ubuntu. Ultra-Stable server you don't want to touch too much: Debian.

MarianoM

@Zanna I like to be prepared, to know how to prevent and keep information intact. On Windows I have never lost anything.

Fabby

@MarianoM BackInTime for data and CloneZilla for the system.

MarianoM

@Fabby I had some experience with clonezilla, the other program I do not know. I'll have to take a look. Thank you.

dessert

just back up everything before and nothing can happen :)

Zanna

^

MarianoM

20:03

In case of data loss, are there effective tools for recovery?

dessert

ubuntu has a huge userbase and a nice question-and-answer site with lots of equally help- and beautiful people ;-)

Thomas Ward

@MarianoM depending on how the data was 'lost', yes.

data recovery is not straightforward as "Can it be recovered", there's a lot of factors at play

dessert

equally good tools as for windows, I’d say

MarianoM

then I think I'll have to hope to find the love of my life around here. hahaha

Thomas Ward

what @dessert said, with the same "factors"

MarianoM

20:08

@dessert then I think I'll have to hope to find the love of my life around here.

Fabby

@MarianoM That depends: I would say >90% of people here are men...

MarianoM

@ThomasWard Of course, I understand that. How does it affect data recovery if in linux it is never defragmented?

Thomas Ward

defrag/fragmentation isn't the only factor at play

TheWanderer

@Fabby it's 2018 SIR

MarianoM

@Fabby I promise not to be confident haha

Fabby

20:10

@TheWanderer Like i said: It depends...

Thomas Ward

puts @TheWanderer and @Fabby in a room and locks them in

TheWanderer

@ThomasWard ew no

Fabby

Dropping subject, oh exalted one!

Thomas Ward

@MarianoM what factors are at play is on-disk free space, whether the system was 'running' and data being written to disk since the 'data loss', etc.

because any "free space" can be overwritten at any time

whether there's data there or not physically

dessert

not everyone around here is helpful though ;P

Thomas Ward

20:12

and some of us choose to be both mildly annoying AND helpful

TheWanderer

@ThomasWard or if you chucked the drive off a cliff then ran over it with a truck

MarianoM

@ThomasWard I understand, I understand. But I was curious about the fragmentation, that's why I asked.

Thomas Ward

@TheWanderer well at that point it's physical damage and you're SOL anyways

dessert

if you drop the hdd into the ocean, no software on earth will help you with the recovery

Thomas Ward

@TheWanderer same could be said for putting a hard drive in the path of a .50BMG bullet being fired, you'll get nothing off it later

except for extensive painful forensic reconstruction of the billions of tiny shattered bits :P

(won't work for flash memory on SSDs though in that case)

TheWanderer

20:13

@dessert if it's unplugged it shouldn't be too hard

Thomas Ward

@TheWanderer salt water corrosion

dessert

@TheWanderer no, you need a submarine

TheWanderer

@dessert how deep is this ocean

@ThomasWard how long is the submersion?

Thomas Ward

@TheWanderer marianas trench.

TheWanderer

whoa whoa whoa

Thomas Ward

20:14

@TheWanderer depends, how many hours ago was 1979?

TheWanderer

you're not OP

dessert

it’s an ocean. not a fish tank

Fabby

@TheWanderer If it's an SSD drive in titanium casing, it'd probably survive a throw off the cliff, a drive over with a truck and being thrown in the ocean for less than a minute... @PerlDuck @TheWanderer@ThomasWard

TheWanderer

REJECT --> CAUSES HARM

@dessert well at the beach, it's still the ocean

MarianoM

@Thomas Ward Anyway with a good backup, it's safer. Changing the subject Which SQL viewer for Windows do you recommend to view a database of an android application?

TheWanderer

20:15

it depends on which SQL format the app uses

MarianoM

It can also be a viewer for Ubuntu. I could try.

Thomas Ward

again, depends on the SQL format that the app uses

TheWanderer

I tend to just keep downloading programs until something works

MarianoM

@TheWanderer How do I find out?

Fabby

@MarianoM hexdump.

Thomas Ward

20:16

@Fabby SPEAKING of clonezilla...

Fabby

;-) >:-)

Thomas Ward

i took a full disk image 2 days ago

Fabby

Good for you! :D

Thomas Ward

and discovered a partclone bug in Xenial which makes it unusable when trying to reconstitute my clonezilla disk image into an actual raw mountable .img file

dessert

@TheWanderer curious there, is “app” a synonym for “program” for you?

Fabby

20:17

@ThomasWard Huh???

Wow!

TheWanderer

@dessert Android has apps

Fabby

@ThomasWard Ah!

MarianoM

@Fabby Is it a hexadecimal viewer?

Fabby

@ThomasWard Yeah, not many people must try that...

@MarianoM Yes, I was just joking...

Thomas Ward

@Fabby yep. bugs.launchpad.net/ubuntu/+source/partclone/+bug/1802330 - Xenial partclone tries to load the file into memory and barfs, but newer partclone doesn't heh.

@Fabby Well, it's not just a backup it's also where I'mma restore data out of manually after I upgrade

so either the upgrade will work and i don't need to revert

or it barfs and I need to restore the older Xenial entirely

MarianoM

20:19

@Fabby Ok, later I find out and I consult them. Thanks

Thomas Ward

hence why i needed a mountable .img

Fabby

@ThomasWard Largest server I ever mounted had 8TB RAM...

(but good to know as I normally don't split my images...)

Thomas Ward

@Fabby clonezilla basic image set is a GZipped partition splits into 2GB-20GB segments, it seems

so i still had to reconstitute the image

Fabby

But you got it done!

Thomas Ward

with pain and backports of newer partclone in a PPA, yes.

Fabby

20:22

Now I know I've seen pigs fly

MarianoM

How is it proven that a PPA is safe?

Fabby

@MarianoM It never is...

Thomas Ward

in this case, the PPA is my own PPA and I copied the package directly from newer Ubuntu

so I mean :P

Fabby

But if you have a PPA loke xorg.edgers with 1000s of subscriptions, it's probably safer than

botnet.IT because the Italian maffia can always use some extra bots.

Thomas Ward

ppa:teward/* is typically safe PPAs. So is ppa:nginx/* because I also maintain those.

but other than those and the ubuntu security team's proposed ppa, I can't vouch for any PPAs :p

(disclaimer: I'm an IT Security guy so I'm picky about what goes into the PPAs I maintain lol)

Fabby

20:30

@MarianoM this is a good answer to read:

25

A: How do I install applications in Ubuntu?

How to install Ubuntu software when you're a (future) ex-Windows user! 16.04 and higher: Ubuntu Software Center has been renamed to Ubuntu Software (Everything else remains the same) The most important thing is to remember that some day you'll have to remove this piece of software that you're ...

2

MarianoM

@ThomasWard Excellent. Is the IT security issue complicated? I was always interested in security, I would like to try some audit.

@Fabby Thanks, later I'll take a look.

In this case love favorites :)

Well, I'm leaving because I have things to do. It was a pleasure to talk with you.

I'll be here soon to learn more about Ubuntu and English.

Fabby

C U!

dessert

@MarianoM hasta luego!

Thomas Ward

@MarianoM IT Security is a huge umbrella that covers a ton of topics

@MarianoM it's impossible to know it all, and you constantly have to learn new things

MarianoM

@dessert Vaya! Que gusto saber que no soy el único que habla español jaja.

Thomas Ward

20:40

and need a lot of energy and cycles and willingness to learn things and such CONSTANTLY

also need to pay attention to details super well heh

MarianoM

@dessert Hasta luego, fue un gusto.

@ThomasWard Obviously when something is passionate, there is nothing that tires, at least that's what happens to me. Technology evolves more and more and in security I imagine that it should be more. It also carries a lot of responsibility, I imagine.

Thomas Ward

yep

i'im specialized moreso into server and network security than IT Security as a whole

but meh

Fabby

@ThomasWard Back when I was a kid, Physical security was the most important thing...

(It still is, but you would be surprised at how far down the list that has become...)

Thomas Ward

@Fabby well, the CLOUD is starting to become the "big thing" so I mean...

Fabby

I've actually seen 23data centers with non-fire retardant glass instead of walls.

2h fire-retardant walls and doors and then: a big glass pane to show off the servers...

Thomas Ward

20:50

heh

Fabby

@ThomasWard One of those hosted a Cloud Service Provider...

MarianoM

@ThomasWard Interesting, I'll keep it in mind for any questions or work because I soon want to create my own xD test server.

Fabby

Urgh! 3! Not 23!

MarianoM

How nice, I admit that I like how servers look with all the wiring well accommodated. Too bad I have not been able to see them in person.

Now if I go, a hug.

Fabby

@MarianoM not always well accomodated

:-)

Yufenyuy Veyeh Dider

21:04

Hello!

dessert

@Fabby that’s how it looks like when you set it up, isn’t it?

Zanna

Hi @YufenyuyVeyehDider

Fabby

@dessert Uh Huh.. :-)

Yufenyuy Veyeh Dider

@dessert this sounds harsh!

Fabby

DC Ops left and I had to finish the job...

@YufenyuyVeyehDider He was referring to me! ;-)

@dessert Everything was documented and it worked, but it wasn't pretty!

dessert

21:07

@YufenyuyVeyehDider don’t worry, Fabby’s harsher :)

Fabby

:D ;-)

Yufenyuy Veyeh Dider

@dessert It depends... on how protected it was and the sofistication of the software too.

i squared - Keep it Real

Hi. I have a bunch of files that contain ? character in the name in the directory and then the ones that do not contain it. To find all of the ones that contain ? I do: find . -name "*?", but what I want is to get the ones that do not contain it, so I found the -not option. But when I do find . -not -name "*?" I am not getting anything, how come?

Yufenyuy Veyeh Dider

@Fabby Ok I get it.

Fabby

@YufenyuyVeyehDider Take everything you read here with a ton of salt.

@isquared-KeepitReal Isn't that because of the font you're using or are they actual question marks?

i squared - Keep it Real

21:10

@Fabby actual question marks in the names

dessert

@isquared-KeepitReal did you try find . -name "*?*" and find . -not -name "*?*"

Fabby

@YufenyuyVeyehDider You're a physicist?

Zanna

that happens when the directory has no execute permission

dessert

@YufenyuyVeyehDider no, first of all it depends on how long you can hold your breath

i squared - Keep it Real

@dessert just tried, the not option does not work

Fabby

21:13

@Zanna That would be all of the files then, right, not just a few here and there...

@isquared-KeepitReal do the names consist of only question marks?

(or do they contain question marks as in a few here and there)

Zanna

oh

it's because ? is a wildcard

if you escape it, it should work

@isquared-KeepitReal like -not -name "*\?*"

Yufenyuy Veyeh Dider

@Fabby Yeah, but my focus is on Software Engineering...

Ubuntu Questions on U&L

0

Q: Shut up a kernel error or avoid it by configuring Prometheus Node Exporter

Let me start by giving the output which I get to see in /var/log/syslog and with dmesg: [559151.898586] ACPI Error: SMBus/IPMI/GenericSerialBus write requires Buffer of length 66, found length 32 (20170831/exfield-427) [559151.911578] No Local Variables are initialized for Method [_PMM] [559151....

ubuntu prometheus-exporter

Fabby

@YufenyuyVeyehDider I have a degree in Chemistry but never worked as an actual chemist except for summer jobs...

Zanna

I am not 100% sure how find processes ? by default. if you use -regex it might be more reliable. But just \? I would expect to be enough

Yufenyuy Veyeh Dider

21:18

@dessert hahaha! Or one could be dead by then.

Zanna

As a shell wildcard, ? means exactly one of any character

Fabby

@isquared-KeepitReal ----^

dessert

@YufenyuyVeyehDider failed recovery I’d call that ;)

Zanna

(in regex, it means zero or one of the preceding character)

$ touch 1 22 333
$ ls ??
22

dessert

right, quoting strikes again:

find . -type f -not -name "*\?*"

Zanna

21:23

i squared gave up and left

I was too slow as usual

Fabby

@Zanna Stop blaming yourself, please?

He/She was too impatient...

i squared - Keep it Real

haha, I did not give up guys, I just noticed that the files that I needed contain "-" so instead of going for not, I just found the ones containing "-". Thanks :)

I will keep in mind escaping, though I think I have tried it

Zanna

oh, jolly good haha

who flagged that answer? haha I have an answer with a score of like 10 suggesting exactly that for an analogous problem somewhere

Fabby

@Zanna upvoted...

Should dissapear from the LQ queue automatically.

Zanna

21:38

Does upvoting remove things from LQP queue? Hmm...

I upvoted it myself, but either someone downvoted it, or the useful "feature" of the system that casts a downvote when a VLQ flag resolves as helpful downvoted it

Anyway OP should probably try to figure out what they've done to mangle package management

rather than papering over the problem...

next question will be "why does VLC segfault?"

and it will be my fault

because I endorsed the dodgy practice of tricking it into using the wrong library

in any case, it's not NAA

MarianoM

23:33

Hi again

Has anyone of you installed Ubuntu on a hard drive with USB adapter? How has your experience been? I want to do something like that but I'm worried that in the shutdown or for some reason the file system gets corrupted.

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Ask Ubuntu General Room