Root Access

ChatBot John Cavil

00:00

I have just been restarted! This happens daily automatically, or when my owner restarts me. Ready for commands.

Michael Frank

@OmarMiguelSanane Just checked on one of our DHCP servers here, a pool is the range of address inside a scope.

So actually, the scope is 192.168.1.0, and the pool is 192.168.1.0-192.168.1.255

Omar Miguel Sanane

okay thanks

I read an entire wiki about dhcp and couldn't find that information lmao

Insane

HOLY S*** I GOT A HAT

DavidPostill

00:16

me too ;)

Ask, answer or vote. I haven't done any of those since midnight ...

Journeyman Geek

Most of the non secret hats (and I'm sure there are secret hats) seem to be pretty easy to obtain

DavidPostill

Yes, but the hat description is "Ask, answer or vote" and I got the hat without doing any of those things ;)

Omar Miguel Sanane

00:33

anyone know in default configuration how many days after receiving an IP address from a dhcp server will a client wait before trying to renew the lease?

Journeyman Geek

._.

That might entirely depend on your DHCP server

DavidPostill

@OmarMiguelSanane The default will potentially be different for each DHCP server ...

Omar Miguel Sanane

I figured

this hw question is pretty stupid

DavidPostill

I think I just found the first Hat bug. My hat is not showing on the chat room list of occupants.

Omar Miguel Sanane

on my computer in cmd its 3 days till expiration

in ipconfig/all

Journeyman Geek

00:39

Winter ~~hats~~ bash has started. Get your hats!

3

@OmarMiguelSanane a more useful question might be why you need to know this.

I do believe it would vary based on your use.

and your DHCP server

Omar Miguel Sanane

It's a homework question.

Assuming a default configuration, how long after receiving an IP address from a DHCP server will a client wait before trying to renew the lease?

Question 4 options:

1 day

4 days

7 days

8 days

I answered 4

based on what i found for my dhcp settings on cmd

Journeyman Geek

"Its a homework question" -> lecturers are lazy. Its whatever the notes say.

Omar Miguel Sanane

I have a 3 day lease right now

DavidPostill

0

Q: My hat is not showing on the chat room list of occupants

There appears to be a bug in the chatroom code - my hat is not showing on the chat room list of occupants: It is correctly showing in the message list:

Bob

@OmarMiguelSanane Default is half of the lease period.

The lease period is very server-specific.

Omar Miguel Sanane

00:43

win server 2008?

Journeyman Geek

@Bob no updates yet on the monitor. :(

Bob

RFC 2131:

> Times T1 and T2 are configurable by the server through options. T1
defaults to (0.5 * duration_of_lease).

> A client MAY choose to renew or extend its lease prior to T1.

Psycogeek

@OmarMiguelSanane what client? why would a client renew a lease if it was (say) a 2 week lease like is handed out by the ISP here? Does the client become disconnected , or disconnect, or try to renew? Why am i the worst student in the world :-)

Bob

> The client maintains two times, T1 and T2, that specify the times at
which the client tries to extend its lease on its network address.
T1 is the time at which the client enters the RENEWING state and
attempts to contact the server that originally issued the client's
network address. T2 is the time at which the client enters the
REBINDING state and attempts to contact any server. T1 MUST be
earlier than T2, which, in turn, MUST be earlier than the time at
which the client's lease will expire.

Journeyman Geek

So, the real question is "What does my lecturer think the time before renewing the lease should be?"

Bob

00:44

@OmarMiguelSanane Great, now you can go look that up.

Blog bot

Announcing Winter Bash 2015

Pops on December 14, 2015

Another calendar year is ending, which can mean only one thing. It's time once again for the event that brings joy to all (with a slight helping of dismay for our friends in the southern hemisphere1): Winter Bash!

Omar Miguel Sanane

I suppose i'm just going to guess on the answer then and ask him later

Alright last question

to implement two DHCP servers on the network so that if one server is unavailable, the other server can still provide addresses to clients. Observing recommended practices, how would you configure the scopes on the two DHCP servers?

Question 7 options:

Duplicate the scopes on both servers.

Create one scope of 192.168.1.1 to 192.168.1.230 on one server, and a scope of 192.169.1.1 to 192.169.1.230 on the other server.

Create a scope on one server of 192.168.1.1 to 192.168.1.100, and a scope of 192.168.1.101 to 192.168.1.200 on the other server.

qasdfdsaq

None of the above.

Journeyman Geek

(Tip: chat's not a great place for live support. Its an even worse place for homework questions.... quite literally, all these should be in your notes)

qasdfdsaq

@JourneymanGeek Your picture keeps changing

Michael Frank

00:53

technet.microsoft.com/en-us/library/cc780311%28WS.10%29.aspx

Journeyman Geek

@qasdfdsaq its the same picture. Only that it has cake.

Michael Frank

DHCP Best Practises.

DavidPostill

@OmarMiguelSanane

3

A: Basic DHCP Leasing

The DCHP Lease Life Cycle The use of dynamic address allocation in DHCP means a whole new way of thinking about IP Addresses. A client no longer owns an IP Address, but rather leases it. This means that when a client machine is set to use DHCP dynamic addressing, it can never assu...

qasdfdsaq

@JourneymanGeek When I click it, I get a different picture with a different round thing

Journeyman Geek

@qasdfdsaq oh. Hats.

You should go ~~downvote~~ upvote someone and see

DavidPostill

00:55

@qasdfdsaq That's because the chat room list of occupants are naked (without their hats)

qasdfdsaq

Upvote a person? On chat? Or the main site?

Journeyman Geek

yes

Its winterbash!

qasdfdsaq

Oh winter hat bash

It's confusing because we've all put hats on top of our pictures already

As in santa hats

Journeyman Geek

Its the hattiest time of the year.

qasdfdsaq

But yeah there's another hat overlay

Journeyman Geek

00:59

yup

(amusingly the santa hat tradition predates winterbash, IIRC, and is from a room that's essentially dead)

qasdfdsaq

So what happens if you get more than one hat?

Journeyman Geek

You pick

qasdfdsaq

Oh cool

DavidPostill

You get to pick which ones you wear.

qasdfdsaq

I want this one

Michael Frank

01:00

That's not a valid option.

Journeyman Geek

;p

qasdfdsaq

David's hat seems like more of a facemask than a hat

Journeyman Geek

yup

qasdfdsaq

Gah Singapore is so... wet

Journeyman Geek

lol

Its been raining a bit

qasdfdsaq

01:01

I was looking at the climate earlier, as well as Bali

Journeyman Geek

its still a fairly nice monsoon season

qasdfdsaq

Seems to be pretty much the same temperature all year round

Journeyman Geek

@qasdfdsaq its an island

within ~10 degrees or so, yes

qasdfdsaq

Except Bali has much drier summers,

DavidPostill

I had better go to bed. Otherwise I will be up all night trying to get all the hats :/

qasdfdsaq

01:02

Within more like 2 degrees or so :-P

Journeyman Geek

cause they're a bigger island

naw

25-32 ....

7?

qasdfdsaq

Geography of Singapore

Singapore is a small, heavily urbanised, island city-state in Southeast Asia, located at the end of the Malayan Peninsula between Malaysia and Indonesia. Singapore has a total land area of 714.3 square kilometres (275.8 sq mi). The Singapore area comprises mainland and other islands. The mainland of Singapore measures 50 kilometres (31 mi) from east to west and 26 kilometres (16 mi) from north to south with 193 kilometres (120 mi) of coastline. These figures are based on 2.515 metres (8 ft 3.0 in) High Water Mark cadastral survey boundaries. Singapore is separated from Indonesia by the Singapore...

Wikipedia says there's barely 2 degrees variation across the year on high, mean or low temps

Journeyman Geek

I live here, I know what the weather is like ;p

wikipedia lies.

qasdfdsaq

Interesting. Is it lying about the wetness too?

Cause that'd be good!

Journeyman Geek

naw

qasdfdsaq

01:04

I'm just bummed I've left it so late that I'm gonna have to pay $700 SGD a night to stay in the hotel with a boat on the roof

Journeyman Geek

but its been mild so far

lol

especially in december

its a 5 star hotel.

There's only like one place fancier than that

qasdfdsaq

It's a lot cheaper at other times, but I left it too late

TBH I'd rather come and stay longer when it's cheaper, given the climate is relatively similar all year round

Than waste about £3k in total just to go there for Christmas when all I really need is somewhere warm

Unfortunately the climate map suggests there is nowhere in Europe that's warm enough right now, at least not in geographical europe

Journeyman Geek

lol

go to india! Its warm and cheap. Just avoid chennai.

Which is currently a city with canals.... least until the floods drain.

qasdfdsaq

Hmm, India

It's not superbly cheap to get to, but not terrible either

£860 return

I was sorta wondering about Australia but that's just a big trip

I mean big trips are sorta things you plan in advance and make it a thing

Journeyman Geek

arstechnica.com/science/2015/12/…

People are dumb.

@qasdfdsaq its closer than singapore ;p

(also, I was wearing my SU hoodie during walkies cause it was coldish and I'm still recovering from my cold)

qasdfdsaq

01:11

Hmm can still do Tenerife for £145 return

Hmm are these chat transcripts searchable (e.g. on Google)?

Or more precisely do they get google indexed

Journeyman Geek

@qasdfdsaq yes

and yes

qasdfdsaq

Dangit

Journeyman Geek

Which is one reason a good idea is not to say anything you are uncomfortable with people finding here

qasdfdsaq

Oh hey there's a website page full of this stuff

lastminute.com/deals/…

Michael Frank

They also get indexed pretty frickin' quick.

qasdfdsaq

01:19

Journeyman Geek

boingboing.net/2015/12/13/which-rectangle-is-darker.html

This is neat. I also have no idea how it works

Unrelatedly

qasdfdsaq

01:48

@JourneymanGeek Localised contrast

@JourneymanGeek mpg.de/9766118/drosophila-contrast-vision

Actually this is a better one youramazingbrain.org/supersenses/brightness.htm

And I can't fucking find the web page I had open a few days ago that explained it.

Journeyman Geek

@qasdfdsaq I know how that works

the wierdness is...

I don't see anyuthing to contrast against there

qasdfdsaq

The line splitting the middle

The line is darker on the left, and brighter on the right, and the localised contrast is interpolated by your brain to the larger area

Journeyman Geek

ahh

see

THAT makes sense

Journeyman Geek

02:38

Ugh. The speakers on the train are clipping.

qasdfdsaq

02:55

You're on a train?

Psycogeek

this sux, i have always kept my pristine offline deluxe everything phone from updating, and wrecking anything. I accidentally switched off data restrictions, and google updated, and now the google search crashes. (has stopped working) and gads it wont stop throwing up the error either.

qasdfdsaq

Android? You should be able to easily uninstall the update and revert to factory version

Psycogeek

@qasdfdsaq yea, but i could not figure out where to remove it? (still searching the web and the 5000 other questions just like it) The store also crashes, the keyboard to put in the password to log-in crashes . fricking dumb , they really reaked havoc on my precious.

Bob

@qasdfdsaq Not always.

I'm trying to avoid a certain type of update that includes a bootloader update with an "anti-rollback".

People who've installed it found that trying to install a previous version bricks the phones.

=> forum.xda-developers.com/g4/general/…

Psycogeek

I got it fully stable now, but google voice typing is gone. In reality google voice typing has saved me 1 hour. I spent that one hour already .

bwDraco

03:03

woof

Bob

Psycogeek

It is a very nice feature, that Offline it works half ass to save 1/2 the typing (it only works best when on-line) . If fixing it is going to take 2 more hours, It Better Be FUN!

If i have to reset the phone, i lose about 1 week, of customising and installing , which will probably only take 3 days to recomplete having done it. So i also have not updated the fully operational (until now) firmware OS junk.

Why they push a update on it, when even many "apps" are listed in the store as weather they work or not with the specific models. Looking at the web i am probably the last person, not the first to have this happen. Why they no fix by now?

qasdfdsaq

@Bob We're talking about an app update here, not an OS update

@Psycogeek Wait, are we talking about app updates (via the play store) or an OS update? The latter usually requires your explicit approval, won't download over mobile data, and requires rebooting your phone.

Psycogeek

right in this case, it seems that it is only some parts and pieces of google stuff that updated and were not ok with my specific configuration.

Bob

@qasdfdsaq Oh, right. Sorry.

qasdfdsaq

03:15

If it's stuff google updated then you can uninstall it via settings => applications

Psycogeek

@qasdfdsaq google makes up a ton of apps, and the One called "google search" does not display a removable update that i can (yet) find.

All the rest of the people on the web, just "removed the update" 15 minutes later, i am like where ?

there is some thing just flat called GOOGLE inc. what ?? that isnt going anywhere, then the 3 services, and the text engine stuff and the store did require updating to even function anymore. Twas a delacate balance of mixed up. Oh just toss the phone and buy a new one :-)

HackToHell

Blaah, my router will come tomorrow apparently

Sigh

Bob

@HackToHell Ah, the pain of waiting for deliveries :P

allquixotic

@Bob I have no idea what you're talking about

What pain? I want something, I snap my fingers and it gets here

except refrigerators :P

Bob

lol

@allquixotic They did deliver the next day, I hope?

allquixotic

03:29

yes

Bob

@qasdfdsaq We have warm! ...if you like the humid kind of warm.

Ugh.

@JourneymanGeek What was the estimated date for the monitor?

I'm told my SSD will arrive on Thursday but it hasn't even left the US yet apparently :\

Journeyman Geek

Tomorrow before 6

Bob

@allquixotic Oh, and -- it's not the LTE, for me. Or at least not LTE + SBC. I tested again with that x100 speaker.

Will have to find some time to do some more Matrix2 testing.

Speaking of which - it's remarkably comfortable for over-ears :P

Psycogeek

And it is a LG g-pro thing "I work for a carrier and LG phones are being bombarded with this error, and also power-cycling. Google, what update did you send in the last week to the Google Search function?" A post from 4 months ago.

I was happlily oblivious to it, and would remain so if i could have more explicitly turned off updating.

Bob

03:56

> You earned Sufganiyot on Server Fault!

wat

Journeyman Geek

04:15

@Bob monitor's already in Singapore tho :p

I might even get it today. And oh snap. I forgot to buy a doorbell.

Bob

lol

Psycogeek

wow because the google search is tied to the google tts which is tied to the keyboard as a method of text entry, many people lost the ability to password into thier phones :-)

Good thing i didnt have a password, or i would be at factory reset like many of them. The many that wanted to "throw thier phone off a cliff" wonder if i should stand under a cliff :-)

collect phones , sell them on e-bay

Bob

04:41

...why does the community user have a mask?

superuser.com/users/-1/community

Hm. It won't onebox :P

Psycogeek

04:54

that is the "tragedy" mask of the "comedy tragedy" pair

Psycogeek

05:27

@JourneymanGeek boingboing.net/2015/12/13/which-rectangle-is-darker.html it is a lie, i just popped it into photoshop and color droppered it , and the left side IS darker. just not readily apparent when there is something between the 2 .

Journeyman Geek

07:16

@Bob fedex just sent me an email confirming delivery is tommorrow

bwDraco

07:29

There's been lots of emphasis on low-power servers lately. Atom and ARM servers are all the rage these days.

The idea: Have lots and lots of cores for highly-threaded applications, each core running slower but much more efficiently than a full-fat high-performance core like Haswell.

Applications like web servers don't need lots of single-threaded power, they just need to process and generate pages quickly for each user. Performance demands rise primarily when more users use the site at a time. Even complex webapps can run reasonably quickly on slow processor cores, as long as no more than a few users per core are on the site.

When your system needs to serve dozens to thousands of users at a time, though, it's far more efficient to scale out than to scale up.

Peak performance will be lower, but as I've said, it's generally adequate for things like webapps.

What matters is that you can deliver your application smoothly and to more users with less power.

Your thoughts on today's low-power scale-out servers?

After all, faster, more complex cores consume disproportionately more power than slower, simpler cores.

Journeyman Geek

@bwDraco I run one. Its good enough ;)

but you can do both

run a low cost, server specific processor with more cores that's using a 'mainstream' core

a pretty important question is what are you doing and dude, do you even ~~lift~~ thread

bwDraco

Well, it comes down to the nature of the application.

Journeyman Geek

That said

one of the advantages of atom/arm servers is also density

bwDraco

Web servers are inherently massively parallel.

Journeyman Geek

Seen the crazyass arm servers that online.net runs?

You could basically run like 4-5 times as many small servers, doing limited tasks, in the same space as a 'simple' blade

especially if you design around (relatively) low ram

bwDraco

07:43

Your typical web server for a large website is not serving one or a few users at a time with very high CPU demands. It's doing small amounts of processing for each of anywhere between a few dozen to many thousands of concurrent users.

Yep, density is a big deal, too.

Journeyman Geek

wee. Goint to have to reorganise my desk. Amusingly my dad dumped 2-3 boxes of documents for destruction in the space I cleared up in another room as a staging area ._.

bwDraco

More servers in less space means more compute power per rack. You can serve far more users this way with much less rack space (and power) than a traditional high-performance server.

Journeyman Geek

yup

which is good if you're a dedi host

or if you need a lot of low powered threads running

bwDraco

...not to mention that you've dramatically reduced task-switching overhead because you no longer have lots of processes competing for a few CPU cores.

That also significantly increases efficiency.

Journeyman Geek

I do think there's also...

Well a certain degree of cultural conservativeness amongst sysadmins

"We've always used big powerful machines!"

which is likely a factor

bwDraco

07:48

It also avoids the issue of having a single point of failure. If one system fails in a massive scale-out environment, you've only suffered a slight hit in performance. In a traditional scale-up environment, you'd see a massive performance drop or even total failure of the service.

You'd need more complex load-balancing, though, to handle lots of small servers.

Journeyman Geek

or simpler load balancing, and smarter routing

bwDraco

It's also cheap and simple to scale. Need more capacity? Just add more servers. There's no need to invest in a huge machine that's not necessarily going to be used to capacity.

JakeGould

08:19

My two cents to this whole server discussion: It also depends on the OS and the web service software itself. I’m adept at configuring and tweaking Apache to the point I can run a modestly small Apache server with some PHP and MySQL stuff on a 512KB server with no issue. Not true with modern web applications that see servers as a big “cloud” such as Ruby and related servers that run Ruby code. That stuff can become a RAM hog quite quickly.

But the popularity of Ruby comes from the perceived ease of “ramp up” when developing. In some ways it’s easier to start a new web site “tabula rasa” with Ruby, Sinatra (Ruby web server) and MongoDB with an Apache front-end using Passenger. It looks right and plays nicely so the client pays for the nice, shiny new site. But it scales like crap. And is a huge resource hog. Especially the MongoDB stuff.

Sounds like old LAMP tech growling at new Ruby web-app techs, but the fact is the new world of web development tends to ignore the architecture of the past and pushes forward with new “app-based” models that might one day become standard and easy to scale… But not just yet.

Well, my uninformed 2 cents. Good night or good morning to all! I’m gone!

bwDraco

Good night to you too.

Bob

@JakeGould 512kB? 512MB?

Because I'm reasonably sure standard Linux distros even start on 512kB.

@JourneymanGeek nice

Journeyman Geek

08:36

@JakeGould There's that

tho many would argue apache's heavy

I run lighttpd, tho I'm sure the cool kids run ngnix

HackToHell

nginx ftw

Journeyman Geek

09:00

kind of a NSFW name, but looks handy github.com/nvbn/thefuck

Bob

@JourneymanGeek lol, I kinda want to use that

but I'd probably end up accidentally nuking something with an incorrect correction

Journeyman Geek

TIL

Asus gaming laptops may not power on, or stay powered, if they have a faulty battery

which is a bit shit, since I run old thinkpads sans batteries quite often.

Bob

09:22

o.O

DavidPostill

@Psycogeek @JourneymanGeek You might like michaelbach.de/ot/index.html Optical Illusions & Visual Phenomena

XKCD

12:57

I'm trying to be healthier, so after I eat this brick of cheese, I'll have a spoonful of grease-soaked vegetables.

Johny Nassar

@MichaelFrank From which side Windows10 is better?

qasdfdsaq

From your side?

@JourneymanGeek That's very shit. Also the first and only time I've ever heard of a laptop not turning on without a battery.

Journeyman Geek

top, 10 degrees to the left.

and a little lower

qasdfdsaq

That said, it's somewhat explainable.

Journeyman Geek

@qasdfdsaq boots up fine with a new battery

Its a fancypants gaming box with a 3d screen that's never been really stretched much ;p

qasdfdsaq

13:05

Certain ranges of high-end laptops can actually use more peak power than their power bricks are capable of providing, so may need the battery with a buffer.

Journeyman Geek

"peak"?

I can't turn on that damned thing

well couldn't

which is quite sad

qasdfdsaq

Lol. It could be by design, as in the design requires a battery to be used as a power buffer/capacitor, and refuses to turn on without one

TBH most (all?) mobile phones won't turn on or stay on without a battery

Johny Nassar

@qasdfdsaq what??

Journeyman Geek

maaaybe

anyway, bought a new third party battery from the battery store at the wretched hive of scum and villany.

And letting it charge.

qasdfdsaq

TIL, my lenovo refuses to lie flat, and the battery is slightly higher capacity than marked

Journeyman Geek

13:11

sounds about right

HackToHell

@qasdfdsaq Mine's lower than normal

15% lowe-_-

Journeyman Geek

the refusal to lie flat is probably so your keyboard's at a 5 degree angle

qasdfdsaq

@JourneymanGeek Nah, the bottom of the case is warped

Journeyman Geek

@qasdfdsaq ITS A FEATURE NOT A ... oh...

qasdfdsaq

@HackToHell They can age, this one's brand new though

Journeyman Geek

13:11

;p

@qasdfdsaq hm. I wouldn't trust it then

HackToHell

@qasdfdsaq It was like that when i got it

qasdfdsaq

Unfortunately there's none whatsoever in stock in the UK to replace it with

Hah, and my mentioning of buying it in this chat has got to page 1 of Google's search results for the product code -_-

HackToHell

lol

Bob

13:35

@qasdfdsaq I've yet to see a smartphone that can run without a battery.

Heck, I can't even remember a feature phone that could do that.

Going all the way back to the indestructible Nokia 3310s

@qasdfdsaq Is that how it came, or is it because you crammed a bigger SSD in there? :P

qasdfdsaq

@Bob Shhh!

I never even closed the case after cramming the bigger SSD in it since it was obvious it wouldn't fit

Boris_yo

What is Best Buy Outlet?

Is it clearance or something?

I noticed that as I add more items I get price reduction...

In shopping cart.

I think I eventually got TDK A26 speaker for $23.99...

It's like wholesale?

qasdfdsaq

I guess

Outlet stores usually sell unwanted/returned/factory reject/warehouse damaged goods

Boris_yo

This is where I am: bestbuy.com/site/electronics/outlet-refurbished-clearance/…

qasdfdsaq

13:54

I'm hungry.

FOR WINDOWS 10!!!!!

Johny Nassar

but windows 8.1 is a lot better for now

qasdfdsaq

No it isn't

Johny Nassar

10 contains lots of bugs, he has to pass 1 year to be ready 100%

qasdfdsaq

Windows 8 doesn't support my processor

W10 is a pain in the butt and uses more power, but meh.

What use is power saving if you can't do anything with it?

Johny Nassar

All windows versions contains bugs in their first year

Journeyman Geek

13:58

@JohnyNassar then use it.

qasdfdsaq

All windows versions contains bugs in their second year, and their third year, and every year.

Journeyman Geek

My brother's asked me to undo the windows 10 upgrade on his system.

qasdfdsaq

@JourneymanGeek o_0

Journeyman Geek

All software has bugs

qasdfdsaq

Undo your brother!

Journeyman Geek

13:58

@qasdfdsaq oh, I have a backup

Johny Nassar

But the first is different man

Journeyman Geek

and I've gotten the key out so I can reinstall again

qasdfdsaq

@JourneymanGeek Doesn't it have a built-in 30-day rollback anyway?

And why? I thought it was all smooth sailing for you ;)

Johny Nassar

After the first year, it became a lot smaller in terms of bugs

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