Ask Ubuntu General Room

Ubuntu Questions on U&L

1:58 AM

0

Q: How to check the processor of ubuntu distribution

How to check the processor of ubuntu distribution whether it is amd, arm or s390x?

ubuntu

Asme Just

4:01 AM

Hi, Anyone know how to remove the new Skype?
I just install the deb file to test it just to find out it was an electron based one and it don't even work.
I tried `sudo apt-get remove skype` but it don't work.

https://www.skype.com/en/discover/

Videonauth

simply open the software centernavigate to your installed programms and find it there and you get a button which says remove

after that make sure you delete the file skype made in /etc/apt/sources.list.d/ directory

Eliah Kagan

@AsmeJust The package name is skypeforlinux. So you can uninstall it by running:

sudo apt purge skypeforlinux

Videonauth

btw the new update for it is awfull

broke my webcam functionality with it and messed up all my sound settings

terdon

8:55 AM

Skype is awful in general. Crappy connections, awful video calls, bad UI, spyware, stealing your bandwidth, I really don't understand why anyone would use it today.

Ubuntu Questions on U&L

9:46 AM

0

Q: how to debug ls -l being slow

I'm on ubuntu 16.04, which was installed by the university where I work. ls works fine, but ls -l very often hangs for 4-5 seconds. I've found some sources saying this could be due to mounted shares and such, but I have no mounted filesystems on my computer (other than my harddrive of course). T...

ubuntu ls

bratner

9:58 AM

Hi all.

TheWanderer

11:22 AM

I don't like LG, but this is a terrible review: businessinsider.com/…

Asme Just

12:22 PM

@Videonauth btw, I purge it.

cl-netbox

Hello :)

@terdon exactly my opinion ... :)

terdon

12:51 PM

yeah. . .

Oli

1:04 PM

Ah bums. Alt+Drag (move) and Alt+RightDrag (resize) stopped working after upgrading to 17.10. I'm useless without them. Halp.

Oh somebody thought it'd be smart to swap Alt for Super.

terdon

Those are always the first tweaks I do to any new DE. I feel your pain.

Rinzwind

geez @terdon

I call that bad design :X

terdon

@Rinzwind Me too!

But .bashrc is not relevant at all. That's read every tie a new shell is started, env vars don't belong there, they should be in the profile family of files.

Rinzwind

My boss has this thing of adding IP adresses to software so it only works on his machine....

terdon

71

A: Is there a ".bashrc" equivalent file read by all shells?

The file $HOME/.profile is used by a number of shells, including bash, sh, dash, and possibly others. From the bash man page: When bash is invoked as an interactive login shell, ... it first reads and executes commands from the file /etc/profile, if that file exists. After reading that fi...

Rinzwind

1:16 PM

But he uses 192.168.10.152 ... that is not very unique :P

terdon

Oh man. ..

Rinzwind

yeah

he wants us to use git as a repo

comment from me: "not until you remove the mysql passwords in software and never do add those again. EVER"

cl-netbox

1:54 PM

@SergiyKolodyazhnyy FYI : As of today you can replace yum with dnf in CentOS 7 -> sudo yum install centos-release-yum4 | sudo yum --enablerepo=centos-yum4-testing install yum4 | sudo yum4 --enablerepo=centos-yum4-testing install dnf-plugins-core ... I have already installed and tested it, dnf works great and blazingly fast ! :)

@SergiyKolodyazhnyy Additional information : dnf gets installed alongside yum ... so you can use both in case you sometimes would want or need to use yum. :)

Thomas Ward

@Videonauth well I do have coffee today so :P

of more importance is food rather than coffee

that said, breakfast time.

cl-netbox

@ThomasWard bon apetite ! :)

Thomas Ward

well unless it's the souls of the condemned to charge my life-force, then it's not gonna be as delicious

laughs evilly

cl-netbox

2:10 PM

laughs "darkly"

Thomas Ward

lights the room aflame as part of his dark evil flaming takeover of StackExchange on this day of darkness and chaos

Oct 31. Halloween night.

and apart from someone egging my neighbor's car last night during mischief night...

cl-netbox

laughs "choatically"

Thomas Ward

... I might not have to go out this evening armed when walkingbetween classes.

Ubuntu Questions on U&L

0

Q: Unlock encrypted Ubuntu via USB

I install Ubuntu and checked the options to encrypt my disk with luks. Every time when I start my computer I get prompt to enter the password to unlock the disk. That's fine, but is there any option to do this using a USB stick instead of typing the password at every boot. Thanks in advance. Ubun...

ubuntu luks

Videonauth

4:27 PM

Nathan Osman

5:47 PM

My ISO collection has grown to the point where I can spin up a VM for nearly any recent Ubuntu release to test something.

Videonauth

6:01 PM

I miss some in my colection but i still have a dvd of feisty fawn somewhere around :)

Rinzwind

6:12 PM

lol. I have 5 dapper drake cd's :{

Ubuntu Questions on U&L

7:15 PM

0

Q: How do I remediate / fix CVEs in Ubuntu system packages?

I have multiple cloud stacks that are running ubuntu trusty (v 14.04.2) and I need to remediate CVEs that I'm exposed to in some system package versions that come with trusty. Eventually I need to migrate these systems to a more recent version of Ubuntu, however until I have resolved blockers to ...

ubuntu security apt

Nathan Osman

NitroShare 0.4.0 can now transfer in both directions. \o/

I've reached core feature parity with the current stable version :P

user136984

7:37 PM

@Videonauth Haha! I love that! But I read the "Huh" as "Wah" at first so that made it funnier! :D

Videonauth

i still dont get it where i can find the keyserver for the arch linux signing keys

terdon

@UbuntuQuestionsonU&L OMG!!! That's actually a question that is correctly tagged with ubuntu and it is a valid, interesting and well written post.

Mind. Blown.

Videonauth

@terdon, do you have any clue why auto-key-retrieve does not work on ubuntu? (gpg not gpg2)

using: gpg --keyserver-options auto-key-retrieve --verify archlinux-2017.10.01-x86_64.iso.sig

terdon

7:53 PM

On Ubuntu or on Arch?

Well, either way, the answer is no.

No idea, sorry.

Videonauth

im on ubuntu host and want to validate the iso :)

yes me too if i would know what keyserver that key is on i could import it beforehand

Rinzwind

Possible terror attack in Manhatten

user136984

@Videonauth: Why not just download it from here https://www.archlinux.org/iso/2017.10.01/archlinux-2017.10.01-x86_64.iso.sig?

Videonauth

@ParanoidPanda i did download the sig from there but well

┌─[✗]─[20:30:17]─[michael@NEXUS-ONE]
└──> downloads $ gpg --keyserver-options auto-key-retrieve --verify archlinux-2017.10.01-x86_64.iso.sig
gpg: assuming signed data in 'archlinux-2017.10.01-x86_64.iso'
gpg: Signature made So 01 Okt 2017 07:29:43 CEST
gpg: using RSA key 7F2D434B9741E8AC
gpg: Can't check signature: No public key

user136984

@Videonauth: What about what this page says?

Videonauth

7:59 PM

@ParanoidPanda same i dont have the public key in my database yet

verifying is not the problem its where do i get the right key

normaly auto-retrieve-key should get it but it doesnt

user136984

Maybe post a question on U&L about it?

user136984

Or post on the Arch forums?

user136984

They normally respond quickly.

user136984

@Videonauth: Well I managed to do this all on Ubuntu some time ago. Someone also recently did it for me on Fedora. So it must be doable.

user136984

How about seeing if they have some sort of IRC?

Nathan Osman

8:03 PM

Oh Apple.

Wat did u do?

Videonauth

@ParanoidPanda doing: gpg --keyserver pgp.mit.edu --recv-keys 0x9741E8AC

beforehand did the trick

but was a lot of digging till i found on which keyserver they are hostet

user136984

@Videonauth: Great! Glad you found the answer! Maybe you should post a Q&A about it on one of the SE sites to save other users the hassle in future.

Videonauth

┌─[✗]─[21:12:25]─[michael@NEXUS-ONE]
└──> downloads $ gpg --keyserver pgp.mit.edu --recv-keys 0x9741E8AC
gpg: key 7F2D434B9741E8AC: public key "Pierre Schmitz <pierre@archlinux.de>" imported
gpg: key 42F98DA59741E8AC: public key "Pierre Schmitz <pierre@archlinux.de>" imported
gpg: marginals needed: 3 completes needed: 1 trust model: pgp
gpg: depth: 0 valid: 2 signed: 1 trust: 0-, 0q, 0n, 0m, 0f, 2u
gpg: depth: 1 valid: 1 signed: 0 trust: 1-, 0q, 0n, 0m, 0f, 0u
gpg: Total number processed: 2

user136984

8:23 PM

Does anybody know by the way when the next version of Firefox (57) will be released?

Videonauth

isnt it already released? thought to have seen a .deb file on their website a few days ago

ah, no its still beta blog.mozilla.org/blog/2017/09/26/…

user136984

So this is the version that they introduce their Quantum engine then?

Videonauth

yep

and the version where add-ons marked with Legacy wont work anymore

user136984

Yikes, Adblock Plus isn't going to work any more!

user136984

I wonder if the new Adblock Ultimate is really any good?

Videonauth

8:34 PM

im using privacybadger

user136984

What does that cover?

Videonauth

nearly every ad you can come across

user136984

Ok, I might give that a go then.

Videonauth

there are only a few sites where i have disabled it

its from EFF

user136984

Apart from ad databases, how much does it differ from Adblock Plus or Adblock Ultimate (I assume that they only differ in terms of databases)?

Videonauth

8:36 PM

eff.org/privacybadger

dont know which databases they use but i have not seens ads in a long while

and the source can be looked at at github

github.com/EFForg/privacybadger

it saves your settings and do not track locally

user136984

@Videonauth: Sounds great! I'm giving it a go! :)

user136984

Thanks!

Videonauth

and another one im using from them is ublockorigin

together with no-script and flash-block it feels extremely safe

user136984

Have you tried uMatrix?

user136984

That is really an amazing tool.

user136984

8:42 PM

The best I think.

user136984

It gives you so much ease in controlling and customizing and the interface doesn't overload you.

Videonauth

you have a link?

user136984

@Videonauth: Here, he's the same guy who is the author of uBlock Origin.

user136984

It's good to use them together.

user136984

As you should be able to see from the screenshot provided there it allows you to very easily choose what to block and allow with the table it provides.

user136984

8:46 PM

It also offers many other privacy and security features.

Videonauth

well ill give it a spin

user136984

@Rinzwind Looks like it probably is.

user136984

@Videonauth: Great! Let me know if you have any questions. I've been using it for quite a while now. :)

Videonauth

it seems to do the same as privacy badger which has btw a very small and clean ninterface as well, but you would not be able to block scripts etc it simply blocks the trackers

user136984

@Videonauth: The most convenient thing for me is that it also allows the blocking of images and has some additional nifty little features in the settings.

user136984

8:52 PM

Because most browsers just automatically download and display images, in terms of exploits, that is a very dangerous thing.

user136984

And I've come across this many times before.

Videonauth

well if i dont want css, images, and script i use lynx2 :p

user136984

So it's nice to be able to only load allowed images.

user136984

:D

user136984

Yes, but this allows you to do it more dynamically, and you could just block a very specific image place.

Videonauth

8:53 PM

when a webpage is good made lynx is a wonderfull tool for just seeing information

ah ok well i installed it will see what it does

the picture above is the menu of privacy badger

where you can allow cookies and block trackign coockies etc

or deactivate them for specific services

Diego Henriquez

Ubuntu!!!

Videonauth

ublock for the heavy lifting of ad blocking

Ubuntu manajaro olé?

:D

user136984

No! Arch is better! >:P

Videonauth

well manjaro is arch, just with an installer

which sucks btw

user136984

No no, that beats the point of Arch. Why would you want it to do the bit for you?

user136984

9:02 PM

The whole point is the lightweightness and control.

Videonauth

true

Charles Green

If I'm every smart enough to figure out how to install arch...

Videonauth

but well i actually be stuck on creating the partitions

@CharlesGreen are you afraid of the terminal?

user136984

Really? That's practically the easiest part. As long as you know which partitions a Linux system requires.

Videonauth

yes well i nevr used parted before

Charles Green

9:04 PM

No, but I'm stuck at installing a GUI. I'll get there, eventually

user136984

Why use parted?

Videonauth

you suggest using fdisk instead?

Charles Green

I think i saw somewhere that cfdisk is pretty friendly

user136984

I personally use gdisk.

user136984

But it's basically exactly the same as fdisk, just for GPT.

Charles Green

9:05 PM

i'll try gdisk tonight.

Byte Commander

Does anyone else in here qualify for this year's hacktoberfest shirt?

user136984

@Videonauth: Why don't you have a look at the manpage?

Videonauth

this i actually do :)

Byte Commander

I just completed my 4th PR and wonder if I should receive any message or popup, or if they'll contact everyone next month.

Videonauth

doing this for the first time, and only in a VM to test around

user136984

9:08 PM

If you can go with GPT, you could use cgdisk.

user136984

That is CLI.

Charles Green

Not sure I can do gpt with kvm

Videonauth

dont know what types a qemu-disk can be i guess it could be both, i dont have an EFI host so i usualy go with mbr/msdos

Charles Green

arch didn't see efivariables, so ran as mbr. no big deal for the vm

user136984

Ok, well, I imagine that fdisk is relatively similar to gdisk apart from perhaps in naming for options.

user136984

9:13 PM

What exactly seems to be the problem?

Videonauth

figuring out the sizes :)

user136984

You normally want just 1 more GB for the Swap partition than you have RAM, and then the rest for the root partition.

user136984

Or at least, that's similar to how I have it here, except I've got things mounted on different partitions as a part of UEFI and security.

Videonauth

well i have 8Gb qemu disk so i planned to tdo 7 GB system (including /root /boot and /home) and 1 GB swap

user136984

That should be fine.

Videonauth

9:17 PM

actually i fail to enter the correct last sector in size when i use 7G it says value out of range

user136984

Try manually entering the sectors.

user136984

Sometimes the tools are a bit buggy in relation to automatically doing it.

user136984

I should probably file a bug report.

user136984

What are your sector sizes?

Videonauth

512 Bytes

user136984

9:19 PM

Same here.

user136984

Should be easy then.

user136984

To calculate.

user136984

@Videonauth: I'll probably be off to bed soon. But perhaps @terdon can give you a hand if you're still struggling?

Videonauth

ah well at the ent i will figure it out one way or another :)

im just bored and decided to give arch a test in a VM

@CharlesGreen well finaly i was using cfdisk which was a breeze to use

user136984

9:58 PM

@Videonauth Glad you figured it out in the end! How is it going now? :)

Nathan Osman

Oh man I love LXDE.

I can reorder items in the taskbar.

Videonauth

@ParanoidPanda now at network configuration inside the chroot

user136984

@Videonauth: Specifically what?

user136984

dnsmasq or you haven't got that far yet?

Videonauth

well what to install to have network connectivity after reboot

o got the hostname set the hosts file changed

user136984

10:00 PM

Right, then after that you can just use dhcpcd you know to connect each time.

user136984

Or use something like NetworkManager as a daemon.

user136984

Which DE are you going to install or do you just plan to use it like that?

Charles Green

ya gots to enable either one...

Videonauth

this is what i thought of, just have to figure out how to install :D

no want to give gnome a try on that

Charles Green

no gnome? this is where i get stuck

I just setup a netgear d7000 as a home router - firewall is "Lets let everything through, you can block some services if you want"

user136984

10:05 PM

@CharlesGreen: :D :D :D

Charles Green

It's really an odd setup! I think I need to create a default "block everything" rule, and try to define allowable services, but I'm not sure that this will work.

Videonauth

10:29 PM

charkes you must have been flying through this setup, i struggled a bit but now booted into the base system

Charles Green

Eh. Read through a couple of tutorials, and the installation guide at [arch](archlinux.org) which is cleverly designed by the same people that design freshman chemistry courses.

Videonauth

ah ok i actually did the install

and well clever designed sure but a lot of cross reading

Charles Green

a lot of cross reading

user136984

Right

user136984

Now

Videonauth

10:37 PM

while you where reading , it took me about 1,5 hours to get the basic installation done and be now booted into the base system

user136984

Goodnight folks! :)

Videonauth

sleep well

user136984

@Videonauth: Happy Arching! ;)

user136984

Thanks! :)

Videonauth

still not sure how to do a basic thing like apt update && apt dist-upgrade with pacman

Charles Green

10:39 PM

pacman -Syu

if you change repositories, then you have to pacman -Syy

Videonauth

ok

debian user untill now

hehe but i got another project running here, installing gentoo on my laptop lol

but stopped on that after countless trys

Videonauth

10:55 PM

but stopping for now

Nathan Osman

Slack just died.

Videonauth

@NathanOsman huh?

Nathan Osman

You know it's bad when both Slack and its status page are down.

Tweeted by nathanosman_dev on October 31, 2017 at 11:03 PM

O_O

That Onebox is pretty big, lol.

Videonauth

:D

Yet Another Halloween http://www.commitstrip.com/2017/10/31/yet-another-halloween/

Tweeted by CommitStrip on October 31, 2017 at 6:06 PM

Byte Commander

And it's pretty empty.

Or does it show any image for you?

Just like for the twitter one above as well

Videonauth

11:09 PM

for me yes

it shows images

Byte Commander

Videonauth

weird

well the comistirp is funny you should use the link then

Nathan Osman

Corporate firewall?

Android Dev

uh oh

I may have just locked myself out of my Amazon EC2 instance

SSH is timing out

Videonauth

let me guess set up firewall and forgot to open port 22 ?

Android Dev

11:13 PM

well ufw was already installed, so I kinda assumed 22 was open

I was following this guide from Digital Ocean: digitalocean.com/community/tutorials/…

maybe someone who knows UFW well can tell me if the commands in there would have locked me out?

Byte Commander

@NathanOsman surely not, I'm at home

Nathan Osman

Hmm...

Byte Commander

@Videonauth already seen it hours ago ;)

Android Dev

but wait a second... it had me disable and enable UFW while I was SSHed into it

shouldn't it have lost the connection when I re-enabled?

it said something about disrupting SSH

Videonauth

mhmm not sure

Nathan Osman

11:18 PM

20 minutes and counting. Someone really messed stuff up.

Videonauth

on ubuntu ufw is intalled but diabled by default and has no ports set

Android Dev

oooh

it was an ubuntu instance

hmm, well I can connect the EBS volume to my other operational instance and edit the ufw file :D

Videonauth

ping the machine with xxx.xxx.xxx.xxx:22 and see if it answers

if not the firewall is up

Android Dev

ping: unknown host 34.229.x.x:22

but my operational instance responds the same way?

Videonauth

mhmm ok

Android Dev

11:21 PM

why is it throwing that at me?

Videonauth

does not seem to work with port i just tested here too on my internal network

108

Q: Check if port is open or closed on a Linux server?

How can I check if a port is listening on a Linux server?

linux port telnet

Android Dev

yeah shoot I locked myself out

well, let me attach it to another instance and edit the ufw file then

@Videonauth haaaalp mount: block device /dev/xvdf is write-protected, mounting read-only

I assume there's a force RW flag?

Byte Commander

mount -o remount,rw /dev/xvdf

Videonauth

^

Byte Commander

but that only tries remounting in rw mode - if it already tried that before and failed, it will most likely fail again

Android Dev

11:35 PM

nope it worked

Videonauth

well from what i see on the manpage there is no force option

since my small server running on a PI 3+ i have it easy tho

standing up walk over switch on the monitor grab the keyboard and boom

but usually i ssh in with key

and ssh to the outside world is not set up in my home network

Scary as hell! https://twitter.com/Nick_Craver/status/925494831543144449

Tweeted by videonauth on October 31, 2017 at 11:12 PM

Android Dev

wait nvm it didn't work :(

sudo mount -o remount,rw /dev/xvdf1 recover/ -t ext4
mount: recover/ not mounted or bad option

what did I do wrong?

Byte Commander

Just rewatched youtube.com/watch?v=zJZfuJdycGc and noted that it is actually fairly halloween-themed. It's a funny satiric music video btw.

Videonauth

@AndroidDev does the other install is still running? maybe this is why it is write potected

Android Dev

@Videonauth no I shut it down and detached it

but maybe the ec2 gui hard killed

dunno

TheWanderer

11:44 PM

guys

Slack is down

Android Dev

[1027542.491096] EXT4-fs (xvdf): VFS: Can't find ext4 filesystem
[1027542.494514] FAT-fs (xvdf): invalid media value (0x00)
[1027542.497754] FAT-fs (xvdf): Can't find a valid FAT filesystem
[1027542.533719] EXT4-fs (xvdf): VFS: Can't find ext4 filesystem
[1027542.537341] EXT4-fs (xvdf): VFS: Can't find ext4 filesystem
[1027542.540923] EXT4-fs (xvdf): VFS: Can't find ext4 filesystem
[1027542.544492] FAT-fs (xvdf): invalid media value (0x00)
[1027542.547387] FAT-fs (xvdf): Can't find a valid FAT filesystem

uhhhh

Videonauth

@AndroidDev in fact im guessing around here, never worked with ec2 instances

Android Dev

did detaching it nuke the contents? I hope not

TheWanderer

Slack has been down since 4:30 EDT

halp

Nathan Osman

Lol. Trick or treat. :P

Everyone's partying on Twitter.

Android Dev

11:48 PM

@TheWanderer I locked myself out of my ec2 instance. halp.

Nathan Osman

Can you get a console through the web interface?

Android Dev

"Unfortunately, we don't have console access available to EC2 instance. If your instance is EBS backed, you can always detach your root drive, attach it to another instance, mount the volume and troubleshoot the issue."

that's what I'm trying to do!

Nathan Osman

Oh my.

TheWanderer

lolrip

Nathan Osman

I almost just misspelled "halloween" as "halloweed".

I bet a lot of people are celebrating both tho.

Videonauth

11:52 PM

halloweed? can i have some? :p

Nathan Osman

No :P

Videonauth

yes happy halloween to those who celebrate

Nathan Osman

Meh, to me it's Reformation Day.

In fact, it is the 500th anniversary of the Protestant reformation.

Byte Commander

To me it's birthday.

Videonauth

same here too, or was reformation day

Nathan Osman

11:53 PM

Oh cool.

@ByteCommander Happy Birthday.

Videonauth

oh happy b-day byte

Byte Commander

And I can't tell which of the three I celebrate least.

Thanks anyway.

Nathan Osman

You can also celebrate The Great Slack Outage of 2017™ with us.

It's been down nearly an hour now.

Byte Commander

I don't care.

Discord >> Slack

Videonauth

im terribly sorry for those victims in Manhattan

Byte Commander

11:54 PM

and I don't watch news, what happened?

Videonauth

remonds me on last year dezember

a guy drove 1 mile along a bike path and mowed down people with his rental truck

Byte Commander

ugh

Android Dev

OK I've got the EBS volume mounted!

Byte Commander

this needs no further comment

Nathan Osman

@AndroidDev \o/

jrg

11:56 PM

With Slack down do we all hang out in Discord or Ask Ubuntu...?

Byte Commander

I'm resident in both

Android Dev

wooooooot!

Nathan Osman

@jrg I'm on so many social networks, it's terrifying.

Eliah Kagan

But you can communicate that terror to people throughout the world with copious emojis!

Android Dev

sudo umount -d /dev/xvdf1
umount: /mnt: device is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))

ok I need more help :(

Transcript for

Ask Ubuntu General Room