Root Access

tapped-out

00:27

grr, Spotify is giving me soooo many Lowes ads today

ruda.almeida

01:08

@tapped-out That's called retargeting.

tapped-out

@ruda.almeida what's the difference between that and normal targeting?

soandos

02:41

What are the odds that if I was scraping a site, and it just went down, that I accidentally crashed the servers?

Journeyman Geek

03:02

@soandos: seen it happen before

soandos

@JourneymanGeek how big a deal is it, and how careful should I be in the future?

Journeyman Geek

usually not much

and amusingly it was the site admin who was doing it, and broke the site, so no one really cared

soandos

ah

in my case it may have been a US gov site

(assuming that it going down coinciding with my scraping is not a coinsidence)

Journeyman Geek

>_>

that would not be cool

soandos

yes

exactly my concern

Journeyman Geek

03:07

gah, stupid heavy machinary

soandos

?

Journeyman Geek

@soandos: there's some destruction and grassing over going on, pretty much right outside my window

for a moment I thought it was one of my fans making wierd noises

soandos

@JourneymanGeek ouch

Journeyman Geek

@soandos: I live next to a defunct railway yard, they're turning it into some kinda park

-2

Q: Is their one click way to prove that Internet is not working :(

I live in Village. Here people have bad mentality. Wikipedia says that my AREA (FIROZABAD) is one of the largest #1 in The world for population. People come to me and tell me to check something on internet. If I help them they will take 1-2 hours. These days I have trouble that Electricity neve...

whut?

soandos

@JourneymanGeek how many web requests is reasonable to have outstanding?

(trying not to crash the server again)

Journeyman Geek

03:22

@soandos: hmm. I have no idea. I would generally keep it under 10. 5 is safe

soandos

just 5?

that doesn't seem low?

Journeyman Geek

oh it is

but I do not want to crash sites. ;p

soandos

I suppose

Journeyman Geek

so i prefer to stay concervative

when downloading stuff in parallel, I usually use 10

soandos

makes sense

time to look up semaphores in c#

Journeyman Geek

03:26

oh, you wrote your own scraper? ;p

Journeyman Geek

03:41

@sathya: superuser.com/questions/597944/… another one for shit SE says I think

Bob

@JourneymanGeek what the..

@soandos AutoResetEvent and ManualResetEvent may be of interest.

Carl B

@JourneymanGeek you seem to have a new friend with the one click. no internet working person.

soandos

@Bob got it working with the semaphore (took 3 lines or so) but thanks

Journeyman Geek

I seem to have

darn

(psst. MORE CLOSEVOTES PLZ!)

Bob

@soandos Depending on what you are doing, that may not be the best choice. There are many substitutes in .NET with less overhead for specific scenarios.

albahari.com/threading/part2.aspx#_Synchronization_Essentials

though that particular page is not quite correct

assigning to an int is an atomic operation

but incrementing an int may be broken into a read followed by a write, therefore not atomic

Carl B

03:57

@JourneymanGeek I feel kind of bad for that person if all they are saying is true, but damn. I put a DV on it already. I am surprised it is lasting this long.

Bob

(though IIRC there is a x86 instruction for incrementing by 1)

Journeyman Geek

@CarlB: we fix technical problems

what he has isn't a technical problem, its really easy to convince a non technical person that a computer is broken, and the first thing a sane techie needs to learn to say is no

Carl B

@JourneymanGeek to true.

Journeyman Geek

"I'm working GTFO" would work here

refusing to help anyone who did not appreciate free help would too

so yes, the real solution is "grow a pair of balls"

(unless its a girl then its.. er... EMPOWER YOUR OVERIES?)

4

Carl B

@JourneymanGeek I think I just pissed my pants...empower your overies..I have to use that on my wife.

Journeyman Geek

04:02

XD

Sathya

04:19

@JourneymanGeek wtmf?

Journeyman Geek

;p

slhck

04:36

Not sure if trolling…

Journeyman Geek

quite sure it dosen't belong here

and the OP is a complete idiot of some sort ;p

slhck

That's what you said :P

Journeyman Geek

;p

cause i'm an old softy who HAS to comment to let people know why they are going wrong. I'm beginning to think its a charecter flaw

slhck

Yeah, like not even on a technical side.

Sathya

05:54

0

Q: Why is PDSP playing up?

I have been looking up binding affinities of drugs to their pharmacologic targets in the PDSP database and for whatever reason whenever I change the species to Human when searching with the Ki ID, "Lysergic acid diethylamide" I get nothing (i.e. this is what it looks like before I hit "Retrieve T...

database

?????

Journeyman Geek

06:12

webapps? ;p

Sathya

@JourneymanGeek no

Journeyman Geek

oh it belongs there. What he's searching for is a LITTLE ... interesting, ;p

Bob

07:14

@JourneymanGeek o.O

Journeyman Geek

lol

It was a spur of the moment thing!

Sathya

07:29

dude cross posts

and then complains he can't see deleted answer

actual reason: The answer was on the other site.

This is why we say don't cross post. sigh — Sathya 39 mins ago

Journeyman Geek

fail!

Tom Wijsman

08:21

Restoring your phone... 12%. Yay!

Reset worked this morning; it did a bit odd after, but now I no longer see odd things. Hopefully a restore is sufficient and the issue stays away...

Tom Wijsman

08:50

Hmm, working on something that consumes a lot of data while restoring a phone using a VM that uses a lot of memory isn't a good idea; glad I thought about it before it started to kill processes... :D

slhck

Attention: there is a user who persistently creates new accounts and asks super-basic questions, mostly about Linux, starting with "Guys…" and poor grammar. Please flag those when you spot them.

7

Bob

09:13

@slhck That bad?

@TomWijsman restoring a phone using a VM..

you like taking risks, don't you? :P

slhck

09:24

@Bob superuser.com/users/225718/belmark?tab=questions for example.

Bob

@slhck Wonder how long it'll take for a question ban to kick in.

slhck

@Bob Well that account was already banned anyway.

Bob

And then we might get the experience the... ahem... joy of him coming into chat to complain about it.

slhck

Ah, that'd be fun

HackToHell

10:20

<3 gameofkittehs.tumblr.com

HackToHell

12:12

OOOh

in Ask Ubuntu General Room, 13 hours ago, by Nathan Osman

Tom Wijsman

12:42

@Bob It runs more stable than running it natively. :P

Bob

@TomWijsman Uhh..

If by 'native' you mean WINE, maybe. But otherwise I just don't see how a VM is supposed to be more stable? :S

Tom Wijsman

Because the VM is more predictable towards Windows, better than running it on random hardware. :D

Bob

Ah.

Tom Wijsman

And the Linux kernel works out all the oddities before they reach the VM...

Bob

I've had enough VM-related deadlocks to use it for something that critical, while I have a choice.

Tom Wijsman

13:16

I can't reproduce them.

Saladin

13:36

@TomWijsman

are you there

HackToHell

in Ask Ubuntu General Room, 2 hours ago, by HackToHell

Is there any way in which Ubuntu updates can be downloaded by just one computer and installed to several other Ubuntu boxes on LAN

any idea folks ?

ruda.almeida

Someone sent an email about a public hearing on the town where I live. With 70+ emails visible on "cc". And the contents are "[inline image 1]", nothing else. I replied (using bcc) saying "please don't" (in nicer words). Immediate result: 25 "address not found"s.

1) Ask a question on AU
2) Maybe you can create a repository on a machine and add its address to any other machine? Hm, no, too trouble updateing each sources.list and creating a custom repository. Maybe use a combination of proxy and caching?

HackToHell

@ruda.almeida ok, will ask it there :)

Saladin

@HackToHell

follow this guide

this works for ossec HIDS

books.google.com.pk/…

it make running copies of the installation and using ssh push it to all agents

Oliver Salzburg

@HackToHell Create your own mirror

Or even better:

5

A: Is it possible to mirror the apt repositories?

You might want to use apt-proxy instead of a full mirror, since it will then take considerably less space and time to get set up: https://help.ubuntu.com/community/AptProxy You would then need to update the repository lists for anyone wanting to use your proxy.

ruda.almeida

13:43

@HackToHell Or maybe ask on unix.SE as it is might not be strictly an ubuntu question

HackToHell

@Saladin nice idea...

@OliverSalzburg will see

I have to try it out locally ... will have to remotely do this stuff to my dad's office

59

Q: Best way to cache apt downloads on a LAN?

I have multiple Ubuntu machines at home and a pretty slow internet connection, and sometimes multiple machines need to be updated at once (especially during new Ubuntu releases.) Is there a way where only one of my machines needs to download the packages, and the other machines can use the first...

networking apt proxy cache squid

ruda.almeida

@OliverSalzburg Wouldn't creating a local mirror demand that he downloads at least once EVERY apt package? A cache would download just once only a package that is requested by a local machine, and cache it for subsequent requests.

(I'm assuming. Maybe I'm wrong)

HackToHell

Will have to remotely do this .. sigh hopefully my dad can set up ssh

ruda.almeida

Oh, I was wrong:

"apt-proxy is a program that caches the packages you download from the Internet, to your hard disk. Because apt-proxy behaves as if it were a HTTP server with a full copy of the repositories you select, you can access the packages from other computers on your network.

If a package is not in the cache, apt-proxy automatically downloads and caches it. This can significantly decrease download bandwidth and installation time when you have to install the same packages repeatedly (i.e. an upgrade of multiple machines)."

"apt clients need the /etc/apt/sources.list file to be reconfigured to point to the new apt-proxy server instead of the outside world. "

If it's hundreds of machines then maybe it's more interesting to set up a transparent proxy

Oliver Salzburg

@ruda.almeida Well, it depends on if you create a full mirror, or, yeah, use the proxy

ruda.almeida

13:51

@OliverSalzburg Blame me on being too lazy to read the first paragraph. If I get this correctly, apt-proxy will download and cache only the requested packages instead of creating a full mirror that would demand lots of time, bandwidth and space

Oliver Salzburg

@ruda.almeida Yeah, personally, I've only worked with full mirrors. I've only learned about apt proxy when I just came across that question ;P

ruda.almeida

@OliverSalzburg I've learned about it now. It might come in handy for my institution, or at least my team as someone was asking me a similar question last week.

Stack Exchange

gemsfromstackexchange: New teeth for everyone!

posted on May 21, 2013

New teeth for everyone!

ruda.almeida

Q: Best way to cache apt downloads on a LAN?

I have multiple Ubuntu machines at home and a pretty slow internet connection, and sometimes multiple machines need to be updated at once (especially during new Ubuntu releases.) Is there a way where only one of my machines needs to download the packages, and the other machines can use the first...

networking apt proxy cache squid

Journeyman Geek

14:13

o0

Oliver Salzburg

28 mins ago, by HackToHell

59

Q: Best way to cache apt downloads on a LAN?

I have multiple Ubuntu machines at home and a pretty slow internet connection, and sometimes multiple machines need to be updated at once (especially during new Ubuntu releases.) Is there a way where only one of my machines needs to download the packages, and the other machines can use the first...

networking apt proxy cache squid

Journeyman Geek

@HackToHell: howtogeek.com/110034/…

I'd have suggested keryx but it seems to be down

HackToHell

@JourneymanGeek helpful during re installs !

Journeyman Geek

lol

I just hit it the install I have with remastersys periodically ;p

HackToHell

Tempted to get this over the nexus 4 ....

Choosing is too hard :P

Journeyman Geek

14:23

lot cheaper?

Saladin

ehllo

hello guys

using ubuntu i want to find real time stats of ifconfig eth0

this is my command

allquixotic

EHLO

Saladin

watch -n1 "ifconfig eth0 | grep GiB"

the commands works fine

but i want to grab just the last 5 numbers e.g 334324333GiB

Journeyman Geek

hmm

Saladin

(\d{1,4})(?!.*\d)GiB

Journeyman Geek

14:25

could you gimme the output of the whole line?

or use cut

Saladin

wait

Journeyman Geek

OH

grep does do regex i think

HackToHell

@JourneymanGeek and it's not hard to get ;p

Saladin

RX bytes:726877048654 (676.9 GiB) TX bytes:28947007411 (26.9 GiB)

with -o

it does

Journeyman Geek

and there's that

Saladin

14:25

rubular.com/r/fQHTdkCKLI

Journeyman Geek

you might be able to use cut and ( as a delinator

but what?

Saladin

i have tested it on online site the regex seems to work

ok

but i just want 7048654 (676.9 GiB)

Journeyman Geek

no seriously

Saladin

last 5 digits

Journeyman Geek

hmmm

Saladin

14:27

i think awk has deliminator option

Journeyman Geek

ugh, too late at night, I know there's something that does that

I abuse cut a lot ;p

Saladin

lolol

can cut use regex?

Journeyman Geek

nope

cut just lets you set delimiters

Saladin

darn do u know the site where i can get the best help

any sister website of SE

allquixotic

@JourneymanGeek wowwww

Journeyman Geek

14:29

BUT

computerhope.com/unix/ucut.htm

this can help

tombull89

superuser.com/questions/597944/…

Saladin

okay wait

Bob

@ruda.almeida you should have replied to just the sender, not the whole cc list...

Saladin

let me go there

tombull89

ah so it won't onebox if it's been deleted.

Journeyman Geek

14:30

@tombull89: lol, I linked that at least twice

nope

Saladin

thanks guys

allquixotic

@Bob yeah no kidding .. i hate it when people Reply All :P

Journeyman Geek

@tombull89: the comments there get bizzarer and bizzarer

Bob

@allquixotic I occasionally use it...

tombull89

@JourneymanGeek could you screenshot it?

Journeyman Geek

14:31

eheh

just a moment

could have sworn I had it somewhere

allquixotic

that question is actually really sad if it's not a troll (and it doesn't seem to be)

WAY off topic, but still sad

Bob

@Saladin How is that the last 55 digits? I count 7 before the parentheses and 4 inside.

Journeyman Geek

@tombull89: with comments

Bob

@allquixotic yea... we need a VtC reason: see a psychiatrist, we can't help here

Journeyman Geek

@allquixotic: I didn't assume so until the suicide part

thats when it got REALLY WIERD

hmm

Bob

14:36

@tombull89 is that a new avatar I see?

Journeyman Geek

superuser.com/questions/598092/… would replacing the HDMI tag with a display port tag be better?

and what do you guys think of a canonical cable identification question?

tombull89

@JourneymanGeek wow.

Journeyman Geek

@tombull89: I know, right?

tombull89

@JourneymanGeek Hmm. I'd be up for writing one of those.

Bob

@JourneymanGeek faaaaar too broad

Journeyman Geek

14:37

@Bob: perfect for CW

Hennes

Hmm. Dot New sentence without capital letter. HDMI not capitalised.

I see edit options

Bob

unless it deals more with how than specific cables

Saladin

hello

for those who are good in regex

can help me with this question

0

Q: how to parse watch command output to last 5 digits?

From the command watch -n1 "ifconfig eth0 | grep GiB". I have output given below, Now i just want the last 5 digits before (GiB). I wrote an regex for it, and it seems to work (\d{1,4})(?!.*\d)\sGiB The only problem is that i cannot use it with the command i showed above? I'm using u...

command-line regex

Journeyman Geek

@Bob: A canonical answer would cover the process of decidign what a cable is, and working out how to describe it I guess

Bob

probably just end up a list

Journeyman Geek

14:38

and various common questions

Bob

which I'm sure exists on Wiki somewhere

Journeyman Geek

yup

@Bob: or the famous deviantart poster ;p

allquixotic

what poster is that ? (stack.imgur plz)

Journeyman Geek

but IMO, thats better than a bunch of scattered "what is this cable" post

Bob

@Saladin that wouldn't work

Hennes

14:40

slhcs pinned item really should have been: GUYS, attention. There is a user who ...

Saladin

@Bob work in what aense

Journeyman Geek

2

HackToHell

@Hennes *slhck

Journeyman Geek

Warning, image will beat up a slow internet connection, kick it in the groin, steal its lunch money and stuff it in a garbage bin.

Bob

@Saladin well, you're checking for four digits followed by not <characterchain><digit> followed by GiB

HackToHell

14:41

@JourneymanGeek still better than gifs

Bob

:S

Journeyman Geek

its a little outdated, pity

last revision was in 07

Bob

(\d{5}) \(.*? GiB\)

@Saladin that should work provided the GiB is always there. Note that this will match both the TX and RX

Journeyman Geek

and it isn't CC, so someone can't remix it

Hennes

The DMS59 port might be wrong. I recall using MS59 to dual VGA cables.
And IIRC DVI-D is digital only

Saladin

14:43

@Bob

let me check this

sorry that regex test link was from another test

not mine

Bob

@JourneymanGeek It's only 0.5 MB...

Hennes

Hmm, no sockets for 68000's, or 68020's, or 6502's, ... :)

Journeyman Geek

@Hennes: geeze ;p

Bob

@Saladin and as that answer says, it'll break if it's not GiB

Hennes

/me waits for the Z80 comments from MSX users. ;-)

Journeyman Geek

14:45

but this is the sort of place where a listy, CW-style QA thread would be useful

Bob

@JourneymanGeek Image is too small to be really useful anyway

Journeyman Geek

@Bob: the version on deviantart is MUCH bigger

sonic840.deviantart.com/art/…

and honestly, I'd dump the CPU types since its not AS useful

Bob

@JourneymanGeek I prefer this:

List of video connectors

This is a list of physical video connectors and related video signal standards. For other video-related standards, please see the main article, video. By signal standard {| class="wikitable sortable" style="width:100%;" |- ! Signal standard name ! Introduction year ! Connector ! Type !width="130"| Max resolution (X-px × Y-px (i) @ Z-Hz) ! Used for ! Notes |- | Composite video || 1956 || 1 RCA, BNC, TV Aerial Plug, Mini-VGA, || Analog || 720 × 576i @ 50720 × 480i @ 59.94 || Consumer electronics, including VCR and LaserDisc, 1970-1980s home computers ...

Journeyman Geek

@Bob: general idea!

Bob

@JourneymanGeek What?

Saladin

14:46

@BOB it aint working

Journeyman Geek

having a canonical resource on SU for cable identification?

Bob

@Saladin make sure you're using PCRE

Saladin

watch -n1 "ifconfig eth0 | grep (\d{5}) (.*? GiB)"

oh

Bob

and, as has been said several times, that WILL BREAK IF THERE ISN'T A GiB STRING, which can happen

Saladin

thats like i have to check with the installed lib

Bob

14:48

@Saladin I believe there's a -e option for grep

Saladin

yes there is

wait

Bob

but that's only vague memories, and I honestly can't be bothered pulling up linux right now

Better might be:

RX bytes:\d*?\d{5}[ ]

(note the trailing space - it's important)

@JourneymanGeek probably too broad... there's a lot of those kinds of questions that are closed

as it is, we're pretty mcuh instantly killing any listy questions

would need a bit of rule relaxation... which is not such a bad idea, come to think of it

could open the doors for more interesting questions, as opposed to just troubleshooting

Saladin

hmm

i don't know let me try it out

Bob

@JourneymanGeek Wikipedia literally has list pages for just about everything

the display cables on is complete with pictures

Journeyman Geek

yup

Bob

14:52

Heck, it has these things

Twin-lead

Twin-lead cable is a two-conductor flat cable used as a transmission line to carry radio frequency (RF) signals. It is constructed of two multistranded copper or copperclad steel wires, held a precise distance apart by a plastic (usually polyethylene) ribbon. The uniform spacing of the wires is the key to the cable's function as a parallel transmission line; any abrupt changes in spacing would reflect radio frequency power back toward the source. The plastic also covers and insulates the wires. In 300 ohm twin-lead, the most common type, the wire is usually 20 or 22 gauge, about 7.5&n...

Journeyman Geek

this is something I will bring up on meta in the morning

Bob

haven't seen that in a while

Saladin

@Bob someone mentioned that you can read the results from /proc/net/dev

Journeyman Geek

then we'll see what the communuty thinks, and have something to point at

Saladin

but i don't know how can i do it in real time

Bob

14:53

@JourneymanGeek :D

user88311

Hey, I'm back

Anybody know of a place to get a some new fine tip soldering iron tips , 0.50mm or smaller, and a decent soldering iron, electric, I need a new one

allquixotic

@user88311 sounds like a topic for electrical engineering chat

but @BenRichards has done some hardware stuff too ;p

user88311

Possibly, but figured people in here might have a few recommendations

Bob

@Saladin Working PCRE (tested): RX bytes:\d*?(\d{1,5})[ ]

allquixotic

that would really depend on where you're ordering from though. online? local store? it really depends

user88311

14:57

online

allquixotic

did you try amazon?

user88311

No local store here would even have a soldering iron, due to the fact, I currently live in a country side area and the nearest store for actual hardware is over 100 miles away

Bob

@allquixotic I still haven't figured out how to get Amazon to not show me items they won't deliver here.

Bloody useless.

user88311

Don't have a credit card, paypal only

@Bob tell me about it

allquixotic

@user88311 get a paypal mastercard and charge it up from your paypal account

Bob

14:59

Oh, they'll happily tell me at checkout. You know, after I've wasted an hour looking at a whole list of similar items and decided on one?

Hennes

Aye

user88311

I decided to check out amazon once, made a account, looked around few items, just to see what I would get for payment options, get to check out, sorry we can't ship to canada

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