Tech @4-ch

Tech @4-ch

Technology, computers and gadgets are the point of discussion.
  • Do you have a small issue or question? Then post it in the Single questions & Help thread instead of making a new thread, otherwise it might get deleted.
  • Don't forget to provide a link (if applicable) to any relative articles.
  • Keep discussion of programming and code over at the Programming discussion board.
Rules · 規則
Board look: Blue Moon Buun Futaba Headline Mercury Pseud0ch Toothpaste
1: How can cropping images make the file bigger?!? (6) 2: Why aren't you using SadOS? (6) 3: How will the failure of net neutrality effect online gaming? (4) 4: [HELP] Single questions & Help Thread [n00b] (354) 5: TRON project as original and newest OSs, Specifications and Concepts (68) 6: How does one download Wikipedia for offile reading, in Linux? (4) 7: learning through direct download? (4) 8: Chroms forking of Webkit, without the bullshit. (4) 9: isn't he aggro (2) 10: Search Revolution (1) 11: The worlds first fully open-source tablet? (5) 12: Firefox OS continues to develop. [NEW PHOTOS] (3) 13: The Pebble e-Ink smartwatch is set to ship. (1) 14: Damn small computers (15) 15: 51cnnet is gone! (1) 16: plan9 second edition (8) 17: [VOIP] [HELP] Need help deciding what would be better for video calling, SIP or XMPP? (4) 18: Error Cannot Copy <filename> Invalid MS-DOS function (44) 19: 3D Printing, can society. (18) 20: MaxiVista alternative (19) 21: Question about Wordpress blogs and accounts (6) 22: Perfect infographic about how the SOPA is very wrong for our Internet. (7) 23: Japanese IME on Windows XP (2) 24: Is there a light web IRC client... (6) 25: Can any of you help out with this Linux distro? (2) 26: Intel fakes playing a game demo when it's actually a pre-recorded video. (1) 27: Using file sharing with Norton Internet Security 2011? (4) 28: Hibernate settings/options (1) 29: Greetings oh gods of technology. Question using Truecrypt (2) 30: How do you like Firefox 4? (10) 31: Importance of graphics card for stuff other than games (2) 32: Posting a thread on (3) 33: Anatomy of a Short Film Volume 2 - Photoshop tutorials (3) 34: Apple fucks up the next Nano (2) 35: What do I do with these files (3) 36: People are really fucking stupid when it comes to technology. (5) 37: Crunchbang Linix on Dell netbook (1) 38: Senators want to put you in jail for embeding youtube videos (1) 39: What does it mean to have an "Unlocked" cell phone? (4) 40: [repourpse] my old iPaq (2)

How can cropping images make the file bigger?!? (6)

1 Name: Artist : 2013-08-17 21:40 ID:QfDEDDc+

For some reason sometimes when I crop an image to reduce the file size the opposite effect happens and the file actually gets bigger? How does this happen and can it be avoided without affecting the picture quality?

2 Name: 4n0n4ym0u5 h4xx0r : 2013-09-01 12:02 ID:2K9ioN4N

Sounds like a format change. Maybe you cropped a png and saved as jpeg? Or maybe you cropped a 8bit png and saved as 24bit?

3 Name: 4n0n4ym0u5 h4xx0r : 2013-09-06 04:25 ID:DP7+Y0kk

Nope, no format change. though the images were all .JPG as I recall. The program I did the editing in was XNview.

4 Name: Kovalski : 2014-08-10 13:12 ID:8GHeQ3Of

It can be happened for some reasons. I saw such thing for once when I edited my icons using special editors from maybe other I don't remmeber exactly. I cropped a picture a lil bitbut I set the edges of the croppin frame OUTSIDE the edge of the picture. After I cropped programm added this piece to initial picture and it became larger.

5 Name: 4n0n4ym0u5 h4xx0r : 2014-08-11 18:46 ID:tBoYea8H

I hope that their bloggers must close bloger.
Because ther are kitty guy,stupid and fuck.

Thank you

6 Name: 4n0n4ym0u5 h4xx0r : 2014-08-24 07:48 ID:MCMmaizc

>>1 is probably long gone, but anyway.

When you do something to a jpeg image, this is usually how an image editing program would do it:


  1. Decompress jpeg file
  2. Convert jpeg macroblocks to bitmap
  3. Do image editing operation

4. Convert bitmap to jpeg macroblocks
5. Throw away some amount of detail (configurable)
6. Compress jpeg file
7. Add metadata (like "CREATED BY ADOBE PHOTOSHOP LOLOL", thumbnail, date and time, etc)

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Why aren't you using SadOS? (6)

1 Name: 4n0n4ym0u5 h4xx0r : 2013-05-31 06:06 ID:HIyrP7pc

It's THE os for an artsy hacker!

2 Name: 4n0n4ym0u5 h4xx0r : 2013-11-06 14:13 ID:4gBHiu3I

because it's sad

3 Name: 4n0n4ym0u5 h4xx0r : 2013-11-08 22:56 ID:zaSnfDBX

i am not a panda

4 Name: 4n0n4ym0u5 h4xx0r : 2013-11-28 20:17 ID:pacy88d/

Because of my Social

5 Name: 4n0n4ym0u5 h4xx0r : 2013-12-12 19:23 ID:GGaXKDr+


Don't you mean Seasonal Affect Disorder?

6 Name: 4n0n4ym0u5 h4xx0r : 2014-07-28 03:22 ID:u47mQMF6

the fact that there are two disorders with the same acronym makes me even more sad than I was previously. (*;_;)

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How will the failure of net neutrality effect online gaming? (4)

1 Name: Bill of the Gates : 2014-01-27 12:03 ID:1mJ/GH/f

How will the failure of net neutrality effect online gaming? Will I have to pay more to play world of warcraft?

2 Name: 4n0n4ym0u5 h4xx0r : 2014-06-04 19:49 ID:BFx+5FvW

Probably not. If your ISP is so evil as to try to extort money from someone, it will most likely be Blizzard, or the company that makes the game you want to play. And if Blizzard don't comply, your ISP might try to drive away Blizzard's profits by slowing down everyone's connection to their servers. So no, if this repeal comes into force, you probably won't be affected monetarily.

3 Name: Bill of the Gates : 2014-06-09 17:11 ID:eOdvkNAZ

So instead of costing me more, it'll just make me more likely to get ganked then when playing online. It is probably a good thing I don't have Comcast any more, greedy comcastards...

4 Name: gorrillaconvention : 2014-08-03 21:00 ID:Heaven

i dont care who says theyre hot or they arent id still put it in all their holes

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[HELP] Single questions & Help Thread [n00b] (354)

1 Name: CyB3r h4xX0r g33k 2005-09-05 20:53 ID:KxkIsG20

If you have a single (or some more) question regarding any of the tech topics of this board and feel that it wouldn't justify creating an own thread just for that, feel free to post it in here.

If you know the answer to any of the questions in this thread, please help us out here! I am sure it's going to be appreciated.

I am creating this thread since there's ben popping up too many threads lately with single questions asking for help that aren't really set out to create too much interest.

345 Name: 4n0n4ym0u5 h4xx0r : 2012-08-16 03:41 ID:sYCeqEuy

Thank you for your reply.
The output of ifconfig gives me values for "inet addr," "Bcast," and "Mask." So I guess I can assume those values are the current LAN address, the Broadcast and the Netmask? Should the broadcast number look something like I know the mask should look like that, but other guides say that the broadcast should be the last address in your network's range, like, for your example, "," so the output confuses me a little.

346 Name: 4n0n4ym0u5 h4xx0r : 2012-08-27 13:16 ID:yjMoyBq1

Does iTunes for Windows do anything to your music files at all?

As in, does it have any sort of deal where when you add your giantass folder of music to its library, it renames all the music files to random alphanumeric things like "HH23X9.mp3 and then places them in a folder tree with names much similar to that? Or does it add some sort of code to your files that only allows them to be played back from within iTunes?

For various reasons I will be forced to use iTunes for the management of my music library but I'm almost scared to try this because I hear things like this about iTunes for Windows very frequently.

Can anyone confirm or deny any of this for me?

347 Name: 4n0n4ym0u5 h4xx0r : 2012-08-28 15:17 ID:HH6HeEdn

I only used it briefly, but I think it stores its own metadata without actually touching your files. That would create problems for a lot of people.

There's probably an option to move/rename/tag music, though.

348 Name: 4n0n4ym0u5 h4xx0r : 2012-08-28 15:38 ID:HH6HeEdn

I use Debian wheezy and the official Firefox binaries.

Just go to the Firefox website and hit the download button. It'll give you a .tar.bz2 with firefox/ inside. Extract that somewhere you have read/write access to--I used /opt/firefox/. After that, add that directory to your $PATH (e.g. open up ~/.profile and add something like PATH="/opt/firefox:$PATH"). Firefox's own updater should be able to update the software with no problems. Setting up any sort of desktop or menu shortcut shouldn't be difficult, just set it to run firefox (or the full pathname) and to use the icon in the firefox/icons/ directory.

Admittedly, it's not the best solution, but it works and ensures you get timely updates straight from Mozilla, with all the dependencies included. However, you may run into troubles with update-alternatives and the like, and you might have to set some options in your desktop environment (if you use one). But in lieu of a proper Mozilla Debian repository (maybe there is one, I haven't checked), it's one of the easiest ways to go about it. Maybe someone a little more package-savvy than myself could write a script that automatically fetches the latest binary, packs it into a .deb, and adds the relevant metadata? I don't see why it would be too hard.

349 Name: 4n0n4ym0u5 h4xx0r : 2012-11-08 01:29 ID:LMy80qwp

How do I define my own keyboard shortcuts in Firefox under Linux? Make whatever keys I want perform whatever action I want and whatnot?

350 Name: 4n0n4ym0u5 h4xx0r : 2012-11-11 19:47 ID:LOUpMS5f

Running Debian 64-bit. Tried to enable multiarch to install Wine 32bit. I was suggested these commands by the "wine64-bin helper package." I ran these commands as root:

# dpkg --add-architecture i386
# apt-get update
# apt-get install wine-bin:i386

When I tried the last command, this was the output:

The most relevant information, I think, is at the bottom:

dpkg: error: --configure needs a valid package name but 'libuuid1' is not: ambiguous package name 'libuuid1' with more than one installed instance

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351 Name: 4n0n4ym0u5 h4xx0r : 2012-11-11 22:32 ID:LOUpMS5f

Same idiot again. I'm going to go ahead and just backup and reinstall, but if anyone has had this happen before and got it fixed, you can post it. I imagine I'm not the only one, even if it seems like it from the google results I got.

352 Name: moron : 2013-09-29 21:55 ID:brK8jmNi

I need Java for homework. I installed it and this is the error I keep getting

Disabling this is not an option, I must have it or I cannot do my homework. What am I supposed to do?

353 Name: moron : 2013-09-29 21:57 ID:brK8jmNi

seems that link does not work, here's a more direct link? I can only hope

354 Name: 4n0n4ym0u5 h4xx0r : 2014-01-14 03:47 ID:8ApaitL8

ubuntuzilla is a repository containing the latest stable versions of mozilla's three programs.

currently hosted at sourceforge.

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TRON project as original and newest OSs, Specifications and Concepts (68)

1 Name: 4n0n4ym0u5 h4xx0r : 2006-03-23 10:32 ID:6Kuniap+

TRON is the Japanese and worldwide computer project from 1984.
TRON has been started by Dr. Ken Sakamura of University of Tokyo.


59 Name: Navin : 2013-04-02 09:53 ID:AfNUiYil

There are many links provided but nothing works... Plz give an working link to

60 Name: 4n0n4ym0u5 h4xx0r : 2013-09-06 07:50 ID:Cur4/6m/

can anyone show me what TRON is?

61 Name: 4n0n4ym0u5 h4xx0r : 2013-09-06 16:38 ID:Heaven

An elaborate Japanese hoax, an operating system that doesn't actually exist.

62 Name: 4n0n4ym0u5 h4xx0r : 2013-09-08 17:03 ID:AD6QitwE

i realy don't get it...
it seems like TRON is realy exist...

63 Name: 4n0n4ym0u5 h4xx0r : 2013-09-08 17:47 ID:Heaven

Just try to find somewhere to download it... You can't, because it doesn't really exist.

64 Name: 4n0n4ym0u5 h4xx0r : 2013-09-08 17:57 ID:AD6QitwE

then, is it just a concept and/or an architecture?

65 Name: 4n0n4ym0u5 h4xx0r : 2013-09-08 23:26 ID:TePtLK2X

TRON is just a specification, but there is a tron-conforming open source os-skeleton available. Skeleton means it lacks code for communicating with processor and memory, if I remember correctly. It does have the higher-level interfaces and some drivers ready as well as the real-time time-allocation stuff.

Also, you already have an I(ndustrial)-TRON system if you have a Japanese camera or car.

This is the current project's web site:

So, TRON isn't 'non-existent' as some people seem to believe.

66 Name: 4n0n4ym0u5 h4xx0r : 2013-09-09 02:05 ID:Heaven

> it lacks code for communicating with processor and memory

well, that sounds really useful.

67 Name: 4n0n4ym0u5 h4xx0r : 2013-09-10 16:20 ID:07SwUYql

is there any tutorials to implement it?
and can you give the os-skeleton's download link?

68 Name: 4n0n4ym0u5 h4xx0r : 2013-09-18 23:04 ID:TePtLK2X


This is the main source. There is also t-microkernel and some packages I don't really know about. If you want to get a t-kernel running you should know your target system's memory management support and the type of processor. It's possible, but if you can do it you can just walk in to some software company and ask for a job. I haven't found any 'ready-to-go' source packages.

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How does one download Wikipedia for offile reading, in Linux? (4)

1 Name: 4n0n4ym0u5 h4xx0r : 2013-02-04 06:13 ID:42dJORyg

It is in fact possible to keep and offline mirror of Wikipeda for yourself. But just the text of it obviously. If you tried to download ALL of every Wikipedia article, including sounds images and videos, it would probably be a couple terabytes in size.
Now, I can't for the life of me though figure out how to do it in Linux. I can find page after page of how to do it in Windows, but nothing for Linux. Help please?

2 Name: 4n0n4ym0u5 h4xx0r : 2013-02-05 11:55 ID:Ksl4vCsv

This seems to imply that you can download an archive and extract it, but media files have to be downloaded separately.

3 Name: 4n0n4ym0u5 h4xx0r : 2013-02-18 13:20 ID:O9VRSUrr

wikipedia is just the text; images are from wikimedia commons (which also supplies images to many other wikis)
so yeah, no images

also, i have the 2012/10 version and it's a bit less than 30 GB
woth downloading, if you ask me.

4 Name: 4n0n4ym0u5 h4xx0r : 2013-08-22 23:53 ID:i/goMVJW

Goodness me, I never knew such a thing was possible! Thank you for enlightening me. I have just downloaded the most recent version.

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learning through direct download? (4)

1 Name: Morpheus : 2013-06-05 08:22 ID:KkpGw0IK

So how long do we have to wait for technology to be able to teach us stuff by directly downloading it into our brains like in the matrix? I don't have the time to read a 900 page book on object orientated programming, I want to know that stuff now!

Neo: I know kung-fu!

2 Name: 4n0n4ym0u5 h4xx0r : 2013-06-13 07:22 ID:RdYxtNbk

This is not how true human learns!

3 Name: 4n0n4ym0u5 h4xx0r : 2013-07-02 20:03 ID:fU9udN/P

I'm still waiting for decent nootropics and brain implants.
I'd like to overclock my brain just a little. Should I invest in watercooling?

4 Name: 4n0n4ym0u5 h4xx0r : 2013-07-30 23:34 ID:P0ql+eXj


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Chroms forking of Webkit, without the bullshit. (4)

1 Name: 4n0n4ym0u5 h4xx0r : 2013-04-04 21:49 ID:8Xxncehn

2 Name: 4n0n4ym0u5 h4xx0r : 2013-04-12 00:50 ID:Heaven

That's an awful lot of bullshit for "without the bullshit."

3 Name: 4n0n4ym0u5 h4xx0r : 2013-05-31 06:04 ID:oLKOtqNm

How so, if I may ask?

4 Name: 4n0n4ym0u5 h4xx0r : 2013-07-09 02:22 ID:Heaven

Here's a copy of the page with the bullshit removed:

<!DOCTYPE html>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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isn't he aggro (2)

1 Name: isn't he aggro : 2013-04-03 03:57 ID:wn4OH2PI

Surely we should have neurophysiological support systems by now.


I want my nutrition blender that reliable supports my body and brain!

Easy immortality as long as you don't get disease or cancer!


2 Name: 4n0n4ym0u5 h4xx0r : 2013-04-04 14:11 ID:uvA88oVl

I just want food in pill form.

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Search Revolution (1)

1 Name: 4n0n4ym0u5 h4xx0r : 2013-03-31 23:02 ID:38rkarH3

Did you know that 90% of people in the UK access their online information through one source? Do you care?

Well. Think of it this way: We wouldn’t watch just one TV channel for our news. We certainly wouldn’t be happy with just one newspaper.

Most people get online, use whatever search box is there, and just click on whatever results they're given, without thinking about what they might be missing.

We're trying to spread the word about searching differently.

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New thread

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