Ask Ubuntu General Room - 2011-07-05 (page 4 of 6)

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Octavian Damiean

3:23 PM

@Gigili I have absolutely no clue.

hi @JorgeCastro @Oli @StefanoPalazzo o/

Hi @karthick87

Hello @Lekensteyn :)

Is there any Winscp equivalent tool in ubuntu?

Octavian Damiean

You mean like scp?

scp -- secure copy (remote file copy program)

scp copies files between hosts on a network. It uses ssh(1) for data transfer, and uses the same authentication and provides the same security as ssh(1). Unlike rcp(1), scp will ask for passwords or passphrases if they are needed for authentication. File names may contain a user and host specification to indicate that the file is to be copied to/from that host. Local file names can be made explicit using absolute or relative pathnames to avoid scp treating file names containing ':' as host specifiers. Copies between two remote hosts are also permitted. The options are as follows: -1 Forces scp to use protocol 1. -2 Forces scp to use protocol 2. -3 Copies between two remote hosts are transferred through the local host. Without this option the data is copied directly between the two remote hosts. Note that this option disables the progress meter. -4 F…

Ofcouse SCP might be the answer, but i need a GUI to browse files

3:31 PM

@karthick87 the file browser should support it

If you install sshfs, you can mount the remote filesystem on the local machine

Yeah fine. But i need to know is there a tool like winscp in ubuntu. Do any one know?

so I want to learn to use basic terminal commands through ssh, anyone know any good introductory guides?

When will Asus EEE Ubuntu netbooks be for sale? http://bit.ly/mdnSx8 #ubuntunetbook

Tweeted by StackUbuntu on July 5, 2011 at 3:26 PM

@Gigili I'm sorry, but I haven't the foggiest notion what you're trying to say.

Octavian Damiean

Interestingly I don't have you on my list. I think.

3:42 PM

I just stopped thinking about it, should hire Holmes or someone

0

Q: How to setup a mail server?

I have read more no of guides on setting up a mail server. But none of them seems to work completely. It would be nice if someone starts writing answer to this question, and this might help lot of people on setting up a mail server.

setup mail-server

not enough info

you don't say what you followed

@OctavianDamiean No worries by the way, I'm nicer than nice.

@JorgeCastro i just don wanna confuse with my previous setup. I would like to setup a new server..

Wow, there's a lot of people here early on in the day.

3:46 PM

well you don't really mention your requirements

but, the easy answer is run tasksel and pick Mail Server

@JorgeCastro fine i will elaborate the question..

@JorgeCastro: What do you think of Google + ?

Octavian Damiean

@FlackBot Who is your author?

@OctavianDamiean Unfortunately, I don't seem to have any information on that topic.

Octavian Damiean

That is pretty bad.

3:53 PM

@GeorgeEdison \o

hello all

@Amithkk Hey, nice to see you!

user image

that is the logo i told about

@Lekensteyn see my updated question..

I just clicked on a Unity icon with both mouse buttons and Unity restarted... is that supposed to happen?

@GeorgeEdison its a papercut

do you have any invites left?

3:59 PM

I'm not sure that invites are working :(

I sent some out but I don't think the people got them.

try me

amithkumaran@gmail.com

@Amithkk There, I sent it.

it'll appear in my inbox ,right?

It should.

waits for invite

4:06 PM

Is it possible to set a policy in ubuntu like, if i set a wallpaper in one sytem it should be applied in all the ubuntu machines..

Any guess o?

it-it.facebook.com/people/Stefano-Palazzo/1409701129

lol

@karthick87 umm no idea!

Stefano Palazzo

for the record: that's not me

not even remotely

but it does prove the fact i should write Stefano Pallazo of Ask Ubuntu on my blog.

@RolandTaylor \o

i have a question regarding 2buntu

o/ @Amithkk

Sure

you got that page : myths of ubuntu

4:09 PM

@karthick87 yes it is possible, but it is going to take some scripting, and maybe a cron job.

i got content for that so shall i get permisson to edit that page

@Amithkk you can join us as an editor

how?

go to 2buntu.com/wp-register.php

and I will edit your profile

ERROR: This email is already registered, please choose another one.

??

4:12 PM

@Amithkk it is?

let me check something 1 sec

i already have a wordpress account anyways

but you have to register with us

well its not accepting my email

oh you are already registered

I just have to edit your account

uh how do i login?

4:14 PM

go to 2buntu.com/wp-login.php

I made you an editor

you are using ISS for your server?

my password is?

i didnt get an email

oh I will mail you a password

give me a sec cause I'm doing something on google+ too

:D

yes adds info

@RolandTaylor you are on 3.1?

I'm planning to upgrade to 3.2

I just need to confirm some things

what, 3.2's Dashboard is awesome

4:27 PM

updating

btw we should discuss any further 2buntu related stuff on our room here or on jabber/IRC

BBL

cya

The Evil Phoenix

greetings

@Alvar your move

@TheEvilPhoenix really? no email

The Evil Phoenix

rly?
i sent it

one sec

1. e4 e5 2. Nf3 d6 3. Nc3 Bg4 4. Bb5+ c6 5. Bc4 Bxf3 6. Qxf3 Qf6 7. Bxf7+ Kxf7 8. Qd3 Nd7 9. O-O Nh6 10. Qc4+

send me the next move via email

note i am on a mobile connection so... I might not respond fast

4:41 PM

@TheEvilPhoenix I've already responded to that move!

check your email!

1. e4 e5 2. Nf3 d6 3. Nc3 Bg4 4. Bb5 c6 5. Bc4 Bxf3 6. Qxf3 Qf6 7.
Bxf7 Kxf7 8. Qd3 Nd7 9. O-O Nh6 10. Qc4 Ke8

Anyone want in on Google+?

Remember you're here to help make it better :D

@RolandTaylor what is google+?

@Alvar you don't know what google+ is?!

@RolandTaylor no, googleing it..

2buntu.com/?p=1144

4:44 PM

:P

@RolandTaylor I don't think invites are working ATM.

@GeorgeEdison seem to be working for me

at the last one I sent worked

The Evil Phoenix

ok responded to your most recent move @Alvar

@RolandTaylor How did you do it?

The Evil Phoenix

strange glitch shrugs

4:45 PM

@GeorgeEdison same old post email in the share box method.

@TheEvilPhoenix faster...

@RolandTaylor Hmm... it isn't working for me.

@RolandTaylor could I get an invite?

@GeorgeEdison keep trying, cause I think they are letting people in incrementally.

@RolandTaylor: Also, this isn't working.

4:46 PM

Also try sending them feedback.

@RolandTaylor sounds like something you want to use...

@GeorgeEdison it won't work now cause I have to change some settings :)

@Alvar what's your mail?

got it?

yep

thanks :)

@RolandTaylor that email is even slower than @theevilphoenix s ...

4:51 PM

@Alvar haha

@RolandTaylor plus.google.com (they are over there limit :()

@Alvar oh :/

funny... it worked just last night lol

I think it is opening up every few hours then

haha grrr...

@RolandTaylor puh...

@sadmicrowave o/

@Alvar don't worry, at least you will now have some priority

it did that to me at first, and then it just suddenly let me in

@RolandTaylor ?

4:55 PM

@sadmicrowave it means hi

@Alvar yes

oh

hi

@RolandTaylor then I'll just wait like everyone else xD

Try again

@RolandTaylor how? Ḯve never got how that works or I've gussed that it just means that...

quick question, I'm trying to set a command alias to do 'ssh user@128.251.xxx.xxx' but bash retuns: alias: ssh lv_admin@128.251.108.xxx: not found...is there a way to do this?

4:56 PM

I see why it probably didn't work (hunch); I didn't add you to a circle before...

@RolandTaylor I havent got the email...

@Alvar just go to the site again

@RolandTaylor aha ! :D

thanks I'm no a member....

:D

@GeorgeEdison I did it! :D!

@RolandTaylor Really...?

5:00 PM

@GeorgeEdison could you help me with Python?

@GeorgeEdison yep ^^!

Apparently the person must also be in your circle.

I've a class named "Backend". Somewhere in my code, I load the backend name from a file. Each backend is unique by that name. What is the best way to use an existing Backend instance? In PHP I would create a static method for that

Should I create another class that is created globally, and operate on that instance for getting a Backend instance?

Stefano Palazzo

@RolandTaylor was that "join me" message meant to trigger the invite bug, or are you just becoming a zombie?

@StefanoPalazzo lol being a zombie :D

Stefano Palazzo

If it's the former, you have to select only that person to receive the message (not "Public")

5:07 PM

it has nothing to do with a bug :D

@StefanoPalazzo :D Could you look at my question above?

Stefano Palazzo

oh good :D

I use a different method

The Evil Phoenix

yawn anyways, greetings people

Stefano Palazzo

oh let me understand it @Lekensteyn. You want to have something like a singleton instance of your Backend class that the rest of the code uses?

5:09 PM

Nope, the Backend class can occur multiple times. I just want to avoid multiple duplicate Backend instances

@TheEvilPhoenix greetings, skyling.

Stefano Palazzo

oh I see

you could use a factory pattern I guess

make a class that creates the class, and then register and free instances

Does Python have static methods or properties like PHP?

Stefano Palazzo

yeah

let my try typing something up for you

meanwhile, check out "properties", and the "staticmethod" and "classmethod" decorators

Thanks, it wasn't mentioned in the Python tut

Stefano Palazzo

5:12 PM

yeah it's somewhat advanced :)

The Evil Phoenix

you should run an advanced python session @StefanoPalazzo

considering python has some advanced properties :P

Stefano Palazzo

yeah, it does have some really complicated stuff

(which, if you know it, makes life awesome)

@Lekensteyn how about something like this:

class BackendFactory (object):

    class Backend (object):

        def __init__(self, _id):
            self._id = _id

    current_id = 0

    def __new__(obj):
        obj.current_id += 1
        new_obj = obj.Backend(obj.current_id)
        return new_obj


b = BackendFactory()
c = BackendFactory()

instead of an incrementing id, you could create or return objects based on the arguments to __new__, and store them away in the factory to keep track of their properties

I realise now that I shouldn't call this Factory pattern. That's something a little different. But you see what I'm saying?

global objects are generally a bad idea. If you have a bunch of things, create something to hold them (not a module).

Isn't current_id becoming a global variable? And yes I got an idea what you meant.

Maybe it become more clear if I explain what I'm trying to do

Stefano Palazzo

current ID is a member of the Factory class (which doesn't have an instance, granted)

as long as they keep references to each other, that's fine

so, what I'm saying is, basically, global variables are :-(, but if you just make your entire thing one big class it's fine. Better yet, make the class mean something. Then you can declare a class member variable to keep track of stuff

the reason why this works is that classes are objects in their own right, just as their instances are objects

I'm creating a python wrapper for duplicity, which can have multiple backup profiles. Each profile links to a backend file which contains some backend information. Since I do not want to parse the backend file again and again, I want to store an existing instance somewhere.

Stefano Palazzo

5:21 PM

oh I see!

you have a function to parse the files?

why not just make it a cached function? then you can call it as often as you like, without losing performance

What do you mean by a "cached function"? Currently, I create some Profile instances in a function (main?) and those instances do not interact with others, so they cannot know of the Backend instances that are created by the other Profile instances.

Stefano Palazzo

this is what it looks like:

def cache(function):
    function_cache = {}
    def cached_function(*args, **kwargs):
        key = (args, tuple(kwargs.items()))
        if key not in function_cache:
            function_cache[key] = function(*args, **kwargs)
        return function_cache[key]
    return cached_function

@cache
def parse(filename):
    return hard_work(filename)

if you call parse(bla), it'll do hard_work(bla). but if you call it a second time, it'll retrieve the result of hard_work(bla) from the cache

this function that returns a function is called a "decorator"

and "@cache" is the same as writing "parse = cache(parse)"

in python 3.2, you have the caching decorator in the standard library (finally..)

the only real restrictions to this are 1) you shouldn't use it with huge arguments, as they get stored in a dictionary, and 2) all of your arguments must be hashable (that excludes dicts and lists)

and 3) you can't have side effects :)

back in a bit

Thanks for explaining the use of @

Stefano Palazzo

once you've written a few decorators, you'll use them all the time. they're brilliant

5:31 PM

I think I'll be using decorators (are @... called so?). The code will be like self.backend = Backend(filename)

Now Python classes looks a lot more useful :)

@StefanoPalazzo did you investigate those latex shared editors?

Stefano Palazzo

@Lekensteyn the function that returns a function is called a decorator. using @bla on a function is called "decorating it".

@lazyPower totally forgot, I meant to ask you about them

its all gravy i could not find that specific project i was thinking of, so i sent you a link to a wikibooks article on several multi-user solutions.

Stefano Palazzo

I must have overlooked that, I only saw your message

@lazyPower does this link work? scribtex.com/projects/trial_user_46pm0lf/sample-project/files/…

if i had a login, it woudl have.

Stefano Palazzo

5:38 PM

oh :\

hehe

i'll signup, hang on

Stefano Palazzo

@lazyPower wait, there are plenty more

ok

Stefano Palazzo

well I don't really see the use of it now

titanpad.com/fPxltJejac

and then you can just, like wikibooks says, wget -O filename.tex "http://titanpad.com/ep/pad/export/xxxx/latest?format=txt" && (latex filename.tex)

Hi, I upgraded from 10.10 to 11.4 and since my upgrade my wifi does not start automatically, can anyone assist?

Stefano Palazzo

5:42 PM

sry, I'm not good with WIFIs

@kuberprok Do you need to connect to a network manually or can't you even see networks on startup?

this is what I have in my etc/network/interfaces

auto lo
iface lo inet loopback

@Lekensteyn I connect manually now with

hi @kuberprok welcome

sudo dhcpcd wlan0

@RolandTaylor thank you!

@kuberprok Did you previously use NetworkManager for connecting?

5:46 PM

yes, it started up without any problems, just after my password for login I could see my Wifi-cards led's flashing and then it was up.

now I need to go to the terminal and type sudo dhcpcd wlan0 to get it started

Stefano Palazzo

do you know what sort of wifi chipset you have?

maybe there's a question on the site

it uses prism-chipset.

Can you post your /var/log/syslog file on paste.ubuntu.com and put the link here?

will do.

@StefanoPalazzo That still counts as a factory - It's still generating instances of another class. I'm not sure this type has a specific name. It's close to a multiton, but it's also not at the same time (a multiton stores a dict of instances so you can only have one instance (ie a singleton - where it gets its name) per key)

I'll buy a book on patterns if I ever got insomnia. It would cure it almost instantly.

5:51 PM

here it is paste.ubuntu.com/638507

Stefano Palazzo

hear hear

The Evil Phoenix

yawns and after delving into the world of the IRC, I have returned. :P

Stefano Palazzo

I read something, in the corner of my eye, about a Borg pattern. I don't know what it is exactly, but I bet it fits this use-case (never mind, borgs are about sharing state..., they assimilate by doing obj.__dict__ = shared_dict)

2

@kuberprok Can you try recreating your NetworkManager profile? Also check if its IP settings are set to Automatic

Hi back for a while

5:56 PM

@StefanoPalazzo Wow, that got geekier than I expected. Scoring: Programming design patterns: +25, "Borg": +20, successfully working the two together with the word "assimilate": +2^1024

@Lekensteyn how do I recreate NetworkManager profile?

And yes the IP Settings is set to Automatic

@kuberprok remove the old profile and create a new one

Stefano Palazzo

@Oli It's kind of hard to understand all of the computer science jargon when you don't know any Scifi ;)

BBL

cya

6:01 PM

@Lekensteyn then I risk loosing my connection, don't I, I do not have a LAN connection nearby. I am on my desktop on the other side of the house

I asked this question before my uograde. askubuntu.com/questions/18973/…

The Evil Phoenix

@kuberprok then i think you're SOL

unfortunately, if you lose your connectivity you won't be here... but i doubt removing your old profile will permanently explode your networking

emphasis on permanently

but if you're concerned, you can wait until you're near a LAN :P

well I hope not, I wouln't like to clean up afterwards!

is it normal for a minimal install to take forever to install?

@TheEvilPhoenix Thanks!

The Evil Phoenix

@kuberprok granted i never had your issue

so better to be safe than sorry in your situation

because i use Intel wifi cards in my systems (or no wifi at all :P)

6:05 PM

@TheEvilPhoenix Good advice

Thanks any guys, I'll try what :1276046 has said when I am close to my LAN

Anyone here accustomed to installing ubuntu from a minimal cd?

I'm install 10.04 and at the point where it says downloading release file, the progress disappears and then I see nothing...

@Explorer hi! I'm trying to set up ubuntu 10.04 to test asterisk right now :) - but it's freezing (I think)...

cause of your desktop background hi

haha

I assure you, there are no cars driving over my applications :D!

=D

so gentle of you

:P gentle?

pulls hair out and throws it at virtualbox!

6:16 PM

<--- understand nothing

VBox eats all hair up :P

U.U @TheEvilPhoenix @Oli do either of you install from minimal cds?

@Explorer lol that's okay :D

@RolandTaylor I did for our media center

@Oli oh cool you might be able to help me

My install is sticking after trying to download the release file

Step one: Use the server CD. Minimal is a waste of time (you end up downloading it all anyway)

6:17 PM

o.o

so I have to download another iso?

D:!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

been a while since I used commandline installs that's why :P

Well in fairness, you've only wasted 17MB of transfer.

@Takkat not voluntary for sure

forgive my noobiness :D

o.o where did Explorer go O.o

The server CD is a lot bigger (it's a full CD) but it does have everything you need to get going so you don't have to fight network issues right off the bat

there's a mini.iso somewhere

6:20 PM

@JorgeCastro yeah that's what @RolandTaylor has

I found the 10.04 mini freezes after starting the progress bar for the download

well here goes another two hours of downloading :P

Well while that's doing that, what are you trying to build, @RolandTaylor?

@Oli so the server CD will allow me to choose what I want to install like the alternate CD does correct?

@Oli I'm trying to test asterisk-gui (so I can tell Explorer how to do it in "so easy a cave man could do it" - terms.

@RolandTaylor pretty much. It installs ubuntu-standard and then runs tasksel to allow you to install more (you can skip this or install more metapackages).

ubuntu-standard being a fairly rich command line environment, nothing more.

How does the Community account end up with 3 rep?

6:24 PM

@RolandTaylor no desktop, no gui on the server CD...

@Takkat kk I just meant if I could use tasksel :P (couldn't remember the name)

the last time I installed from an alternate CD was back around 8.xx something

or earlier

@JorgeCastro It accepted a question on April the 18th and got +2

O_O hah, how does that happen?

u.u?!

@JorgeCastro It was a migrated post that (I assume) already had an accepted answer.

6:27 PM

oh I see

Because of the way things have to be re-built when they're migrated, Community has to do some evil behind the scenes.

I assume he gets normalized eventually

* Suspends Community for being a sockpuppet

o.O

@JorgeCastro: I'm going to hate myself for forgetting this one... but what was that app that generated a 3D visualization of revisions to a repo.?

6:29 PM

gource

RIGHT!!

I knew it started with a 'g', but Google was being mean today.

@maroceppi youtube.com/watch?v=z9DpIsq1e2w

Can I benefit from UbuntuOne services on a non-Ubuntu Linux flavor? http://bit.ly/ksLnah #ubuntuone

Tweeted by StackUbuntu on July 5, 2011 at 6:26 PM

Stefano Palazzo

@lazyPower that's pretty cool

:) I'm a fan of 8/16 bit remixes.

Stefano Palazzo

6:36 PM

When I was driving to get some usb widget the other day, there were chiptunes playing on a childrens radio programme

nice

Stefano Palazzo

if that's what kids want to listen to, the world is only going to get better. looking forward to the future

I've had a passion for MOD trackers, chiptunes, etc. ever since i ran across the ORION dump site for their keygen music.

The Evil Phoenix

@RolandTaylor never. why?

@GeorgeEdison amusing i generate a gource view once a month on our work repository so the boss can "see" that i've been busy. as if the logs i email once a week from the issue tracker isnt enough :P

6:43 PM

@TheEvilPhoenix nvm Oli helped me :)

Back in my day we only had two bit music.

back in my day, we didn't play music on computers...

@lazyPower Lol!

I think I'll generate one for StackApplet.

Does Google+ have an API?

Hello again

services.google.com/fb/forms/plusdevelopers

^--- Filled that in.

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