Ask Ubuntu General Room

I have grub installed as my boot loader for dual booting windows 8 and Ubuntu. It works fine as long as I'm only booting Ubuntu but as soon as I boot windows, something stops working. The next time I reboot my machine, there is no grub menu, nothing. My BIOS seems to think there is no operating s...

gentmatt

11:19 AM

@Braiam I finally got it working! askubuntu.com/a/406296/172081 The mirroring works, but I still need to figure out a way to check if the self healing works.

I.E somehow mount one of these drive and flip a bit in file X. Then check the log for self-healing updates.

Avinash Raj

11:50 AM

@seth i already put a close vote on askubuntu.com/questions/401920/… but reverted back

now there was no close vote appears on that question

Amith KK

12:10 PM

@Rinzwind that ep was sexy!

Avinash Raj

@AmithKK no u r under 18.

Amith KK

*awesome

Avinash Raj

@Oli why askubuntu.com/questions/401920/… not a dupe?

0

Q: Canonical Apprenticeships?

I am currently a student doing my 4th year at college passing 3 separate courses, My issue is that when I finish my course I will need to get a job or some sort of way to get income, I was thinking on going into freelance website design but that is a different story, I love Ubuntu and I love the ...

networking

Oli

@AvinashRaj It's a duplicate but I'm not sure that the older one is any better. I'm also shocked that the older one is so new. I'm certain there's a much older version of that question.

Avinash Raj

i think askubuntu.com/questions/406346/canonical-apprenticeships it's a question on behalf of many

Rinzwind

12:35 PM

@AmithKK not bad not bad :)

Amith KK

I have a question tho

Rinzwind

as long as it is about ubuntu it is ontopic >:)

Amith KK

Why is rin and kakashi stll looking young but obito is grown up?

Rinzwind

95% chance this aint real ;-)

bbl

Braiam

Maid Café (メイド喫茶)

Welcome back, my Master! (お帰りなさいませ、ご主人様!) Sit wherever you'd l...

5

or Anime & Manga

Nkciy84

1:49 PM

I have added new information in my post askubuntu.com/questions/405759/… and it seems like everything looks okay. I'm realy not sure on what to do next.

Dew

2:10 PM

@AmithKK there are some Kids in the chat room. So, Please....

jrg

@Dew he is one of the kids...

Takkat

@Nkciy84 short (as I have little time because of work) Linux partition still not there --> deeper search. Then list the files if any...

Mochan

@takkat Yeah I saw that ahaha

@AmithKK You're quite welcome. I'm good. Sorry, I basically just came to chat to leave that question here then just left XD

Dew

@Takkat @Mochan o/

Nkciy84

@Takkat Deeper search on gpt efi gave a lot of jibberish. A very long list of partitions that didn't make any sense. Scrolling from top to bottom costed about 3 minutes, so I went with the 'regular' search. I've found that the third and fourth MS DATA partitions had the linux files

@Takkat Everything is there

Takkat

2:20 PM

@Nkciy84 you may try to copy some of your files to an USB stick to see if they are alive. As long as you don't [write] you won't do much further harm.

Nkciy84

@Takkat on it

gentmatt

High guys, do you know how I can edit a file in vim without manipulating the time stamp?

Nkciy84

Braiam

can a mod close this as Off-topic instead of dupe

Nkciy84

@Takkat Listening now, and working

Takkat

2:31 PM

+1 for nine inch nails ;)

Braiam

@gentmatt touch it afterwards?

Nkciy84

@Takkat Another way to try and make this situation likable LOL

Takkat

@Nkciy84 what about other linux files? File where permissions may be an issue?

Nkciy84

Oh, yeah, I forgot due to my euphoria... let me see

Takkat

@Nkciy84 look for most recent files too.

Nkciy84

2:35 PM

@Takkat Well, some of it is damaged and some is not

@Takkat A lot is written in red, but it seems that a lot of other files are accessable

I just checked by copying to an SD

vmlinuz is damaged though..

Takkat

The red ones could still be recovered with PhotoRec (but then not filenames, folders, permissions).

Are permissions there? I am worried about the MSDOS thing...

Nkciy84

@Takkat how do i know?

Takkat

Check file properties on the copy but only if you had copied them on ext4. Otherwise they are lost on the copy.

Nkciy84

@Takkat it seems to be ok when copied to the SD

GabrielF

Hi all... I've seen a number of threads recently reporting nvidia drivers to just crash with a black screen on boot, needing to use the command line apt-get purge to fix it. Anyone knows if this always happened? Or maybe something is badly broken with X integration with nvidia drivers in 13.10?

Takkat

2:43 PM

@Nkciy84 looks good to me. Now go and copy all your files on an external drive to be sure to have them rescued.

Nkciy84

@Takkat Working on obtaining a drive, thanks

@Takkat what should I do after that is done?

Takkat

@Nkciy84 you may want to rescue still missing files with PhotoRec (overnight process, really).

Nkciy84

@Takkat I assume you are suggesting to do a fresh installation after backing up all the files

Takkat

If the backup is o.k, all files are good, and you feel like it you may "write" the partition table from testdisk to see how much damage there is. Be warned - you may have to reinstall al lot, if not all, but your data are safe.

Nkciy84

@Takkat Thank you very much

Takkat

2:48 PM

If all runs smooth you may try without a re-install but this is the best possible case, hence unlikely.

<-- one time completely recovered a drive without data loss

Nkciy84

We'll see. In the first place I am happy that the damage seems rather small and there is a way to repair most of it. I am very gratefull for the time you spent on this. Thanks a million man...

Takkat

@Nkciy84 one word on PhotoRec still: it will give you all files of the type you specified that ever were stored on the 1TB drrive with random numbers as name but appropriate extension in a single directory... I wouldn't want to sort these out, really.

Journeyman Geek

@Takkat: there's supposed to be a script to sort that out

Nkciy84

@Takkat Thanks for the heads-up.

Takkat

But in case one of these files is vital, you may want to do that anyway.

@JourneymanGeek Scripts can help for photos and mp3, true.

Journeyman Geek

3:01 PM

yup, anywhere there's meta-tags

Nkciy84

Ok, first steps first... On the top of my list of things to is get myself a 1TB HDD for backup

I'm already in deep over my head, really.. so, yeah

Takkat

you may need 2 of these if you plan to PhotoRec,

but you may be lucky and get almost all files rescued from testdisk.

Nkciy84

Let's hope for the last

After this is over, I think the first thing I should do

is change my avater

from noob to veteran or something, lol

and secondly, get a bottle of scotch

Takkat

lol - teach everybody to not change partitions without a backup first.

gentmatt

@Braiam Sorry, I couldn't answer quicker because my internet connection was really horrible. :/

Touching the file and changing the time will not work in my scenario.

This is about my RAID setup again. (askubuntu.com/questions/406096/…)

Nkciy84

3:11 PM

@Takkat Wearing a blue robe and stuff, becoming the backup guru of the modern age...

gentmatt

I copy a picture to the RAID. Then I enter one of the volumes and open the picture in vim. In vim I flip just one bit. Then I safe and leave.

Because the 'corrupted' file has a newer time stamp, the mirrored picture is replaced with the corrupted picture and not the other way around.

Avinash Raj

askubuntu.com/questions/406392/… is that off-topic

Mateo

3:47 PM

yeah development. an answer for trusty on the other might be alright, but who knows that bug might be fixed really soon - and the accepted answerer answered on both..

gentmatt

4:01 PM

It's quite interesting what changing just one bit can do to a picture, but I can't do this stealthy (without changing the time stamp).

Before:

After:

Oh really, I can't upload the second picture?!?!?! Well, here's a screenshot of the picture when I opened with eog:

Oli

@gentmatt I read that article too :)

Amith KK

beat that

My internet speed is so slow that speedtest's download test won't even start

2

gentmatt

@Oli Yeah, that was a really nice read.

@Oli Any idea how I can change that one bit stealthy?

Braiam

@gentmatt again, you can use touch to change the timestamp of the file or find a way to break vim so it doesn't change it...

gentmatt

@Braiam The problem is that when I save and quit vim, the change is immediately mirrored.

Oli

4:12 PM

@gentmatt No. You'd need to badger the data directly without going through the filesystem (dangerous dd stuff)

gentmatt

@Oli Well, this drive is to experiment for now. So I'd be willing to do anything. (Expect physical damage) :)

But how else can I verify if the self-healing thingy works for me?

Braiam

most of the time we trust that it works... until it doesn't...

@JourneymanGeek any idea how to damage a single bit of a raid array to test if the raid works as expected?

Oli

You wouldn't be able to. You'd need to work out where the file lives in the filesystem (stat should help there), unmount it (it will have to be offline - the article says this too) and then change the data... But I'm not sure on the technical low-level writing side of things.

gentmatt

Oh.... :(

Oli

But yeah, this is all stuff I'd definitely only consider doing with a virtual filesystem

gentmatt

4:18 PM

Well, thanks for the talk anyway. I don't think that 'simple me' will be able to do this then. So I'll try to find more documentation to verify if the self-healing should work :P

Braiam

we could do this if tagging didn't suck

Amith KK

What happens if a hardware fault causes the timestap to mess up?

gentmatt

(Oh really, since when do gifs not work...)

Amith KK

Can that seriously happen?

Oli

@gentmatt Well, I've asked... askubuntu.com/questions/406463/…

gentmatt

4:27 PM

@AmithKK Sure, why would nature ignore the bits on the disc which store time-stamps?

@Oli Ha!

Amith KK

I just found a loophole in raid

Time to shut down bushinesses

Rinzwind

@Oli dont think you can :-X

gentmatt

@Rinzwind Well, the arstechnica reporter did this intentionally in his picture.

Rinzwind

thinking out loud...

Braiam

@Oli not sure here you will get answer...

Rinzwind

4:30 PM

make a dd copy. mount it elsewhere. change a file. restore the dd copy. remount it?

gentmatt

What I did (but which is not what is being asked specifically in this question) is:

Rinzwind

or would that be an acceptible change? :S

gentmatt

vim my_pic.jpeg

:%!xxd -b

change one bit

:%!xxd -r

:wq

Rinzwind

@oli I would ask in comments on that site how he did it O Bug him to death >:)

Amith KK

@Oli Isn't that a U&L question?

Oli

4:38 PM

@AmithKK It could be... But it isn't :)

It could be a ServerFault or a SuperUser question too. With a bit of rephrasing, it's probably on topic on StackOverflow too.

Ubuntu Questions on U&L

0

Q: How to restore desktop configs after an intallation

I have installed recently PgAdminIII and Geany via Ubuntu Software Center, but this changed my desktop configurations. It no more koos like before. I am using Pinguy OS 12.10 based on Ubuntu 12.10. How can I restore my configs ?

linux ubuntu restore

Mateo

@oil have an old 486 computer laying around?

Rinzwind

gertvandijk got an answer for oli :D

yay dutch people

Mateo

ask.slashdot.org/story/10/03/02/2341236/…

Oli

@Mateo I'll start training butterflies.

Braiam

4:49 PM

> Got myself a disk editor, and wrote something on the very first sector.

After that I can't use the HD anymore.

The computer can't even recognize it anymore.

...

Mateo

lol, there is some gold in there

wonder if you can format a floppy, don't floppy's have low level writing

Rinzwind

5:13 PM

@Braiam nice :D

Ask Ubuntu Meta

0

Q: Is there any waiting time for getting answer?

I am just wondering for answer for my question. Is there any waiting time average for a question to be answered in this forum? It would be helpful because we can make a decision to ask to another person in the office (for example lecturer in university, etc.)? Thank you

discussion answers timestamps

Nkciy84

5:49 PM

Hey @Rinzwind where stays that harddisk now he?

Rinzwind

@Nkciy84 I'd throw it out the window :=D

Nkciy84

@Rinzwind I got some good advice and help from Takkat, now I'm just waiting for someone who is nice enough to lend me a large enough hdd for backup

Rinzwind

cool :) maybe there is hope

Braiam

@Oli I trow it in both chat rooms to get more eyeballs

Nkciy84

@Rinzwind I was able to restore some files and got great feedback from testdisk, so yeah

Seth

6:13 PM

@AvinashRaj Actually, he just needed to upgrade his kernel.. Not sure we should close it just because he's using Trusty..

Ubuntu Questions on U&L

6:31 PM

0

Q: How to make a u disk Linux?

Things like this. I want to make a ubuntu u disk, and it can save my project.And I can take it to my factory and programing on it. And my computer is Ubuntu12.04, What can I do to make it? I have two ideas. To find another one u disk,and install the Ubuntu on one of them.Then install iso on ...

ubuntu

Braiam

@Seth it should be closed just because he's using trusty ;)

Seth

@Braiam I'm not so sure.

but I'll leave my close vote.

Seth

6:55 PM

0

Q: How to make a u disk Ubuntu?

Things like this. I want to make a ubuntu u disk, and it can save my project.And I can take it to my factory and programing on it. And my computer is Ubuntu12.04, What can I do to make it? I have two ideas. To find another one u disk,and install the Ubuntu on one of them.Then install iso on ...

12.04 installation udisks

O_O

Braiam

@UbuntuQuestionsonU&L you will get closed there...

What you mean with an "u disk" — Braiam 25 mins ago

Rinzwind

translator needed:

0

Q: No Puedo Ver la Interfaz De Instalación de UBUNTU 12.04

Booteo la usb que contiene ubuntu 12.04 y carga y luego la pantalla no da imagen, apareciendo el mensaje de entrada no admitida. La marca de mi monitor es AOC.

boot

:P

Braiam

@Rinzwind err... I know he's talking in spanish... I can read spanish, I don't understand what he means after "carga y luego"

@Seth anyone have a "unclear" vote for that? @Rinzwind?

Seth

7:29 PM

@Braiam sure

hbdgaf

8:43 PM

@Braiam probably not dupe-able to black screen. image does not show is "no boot splash" and input not supported is probably refresh rate or resolution differences between the tower and the monitor (or it's an aux monitor, or it isn't plugged in)...

And it seems this is a common problem for AOC monitors from a cursory google search - even for high resolution/refresh rate Windows users.

Braiam

@hbdgaf those "or"s doesn't make me want to duplicate it...

@hbdgaf then a hw failure?

hbdgaf

i edited it to not after i thought about it

@Braiam check my edit

Seth

9:10 PM

Wut dat you say?

@Braiam askubuntu.com/posts/405530/revisions

Braiam

What is the output of apt-cache policy libqtgui4 libqt4-svg libqt4-opengl libqt4-declarative:i386 libqt4-declarative? Edit your question. — Braiam 1 hour ago

Seth

Yeah I know.. facepalm

Seth

9:28 PM

Hey, did anyone know launchpad bugs and ubuntu manpages onebox?

Braiam

I knew about launchpad... dunno about manpages

Seth

in The feeds, 4 mins ago, by Seth

sl - display animations aimed to correct users who accidentally enter sl instead of ls.

sl Displays animations aimed to correct users who accidentally enter sl instead of ls. SL stands for Steam Locomotive.

blade19899

9:54 PM

plus.google.com/110057782918857744445/posts/JTye28sUEAS

ahh to bad G+ pages don't one box

But, anyways. Spammers show up using my name again? or... AU a save place for me again?

Ubuntu Questions on U&L

0

Q: Ubuntu: how do you swap eth0 and eth1? (Ubuntu 13.10 server in a VirtualBox VM)

I installed Ubuntu 13.10 server (64-bit) in a VirtualBox 4.3.6 VM (Windows host) with one NAT adapter assigned. The only non-default software selected during installation was OpenSSH. So far so good... I could ping the world and the address is 10.0.2.15 as would be expected (per ifconfig the NAT ...

ubuntu networking virtualbox

Seth

@blade19899 I haven't seen any more spam..

blade19899

@Seth, good to here.

I was getting to busy flaggin spam at work i forgot to do actual work.... xD

Seth

@blade19899 LOL

hbdgaf

10:15 PM

epic under-rated answer on SO: stackoverflow.com/a/18032347/486399

@Seth i loled at that too, but running 12.04 for app-dev testing in vbox on 13.10 is a reasonable - even encourage-able solution.

Braiam

10:42 PM

@hbdgaf whoa

blade19899

This IMO is a must have feature in a file-manager: askubuntu.com/q/117743/36315

Linked answer: askubuntu.com/a/187351/36315 Hate those

PPA packages do not show a changelog in update-manager

When installing official packages via update-manager, the change log is available from a tab in the GUI (next to description). These change logs are not available for PPA packages. Could this facility be added? When discussed on IRC #launchpad, there was some concern this might blur the boundaries between official and PPA packages and result in unfounded trust in the PPA packages.

Launchpad itself

Low / Triaged

> fdgzghxfhfg@gmail.com,

don't we have an e-mail validator that reject edits from spam emails? suggested edit: askubuntu.com/review/suggested-edits/210024

Seth

11:18 PM

@guntbert Go ahead :)

I'm guessing it's this one.

Braiam

anyone else but me thinks that this is a bug?

Seth

I approved it because:

A: If I ask a question knowing (or thinking) I can use testdisk as an answer (lets say I'm just not sure how) I might tag it [tag:testdisk].

B: People who know how to use testdisk will have a better chance at finding the question.

hbdgaf

11:35 PM

@Braiam i know... awesomesauce right? way better than the accepted answer.

Braiam

heh, @Oli question is in the Hot question list

hbdgaf

what question?

Braiam

13

Q: How can I flip a single bit in a file?

I want to intentionally damage a file in order to test the claims that btrfs can heal itself. The article talks about taking the filesystem off, damaging a photo by "flipping" a single bit and then remounting it. In older filesystems this would just be corrupted but it's supposed to fix itself in...

filesystem btrfs corruption

hbdgaf

wow... that's a silly way to go about it. seems like he wants someone to write debugfs for bartfs if it doesn't already exist. related question + dd and offset stackoverflow.com/questions/3444844/…

on a lighter note, i got my django db sync slowness problem under control by putting 13.10 on 1.6 instead of the older 1.5 with pip... and using bulk_create and queryset.last()

Braiam

11:52 PM

@hbdgaf it exist, it's called (reads strugee answer) btrfs-corrupt-block

hbdgaf

i saw that too. it was just a thing.

done coding for the night. closing all windows and killing some zombies. it's been fun @Braiam - later on. tag me if you see something you want another brain on. i haven't forgotten about uberwriter packaging, i just have more pressing issues with deadlines.

Maid Café (メイド喫茶)

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