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OSX: 5 second timeout for domains defined in /etc/hosts

This is mostly for my own reference, this document has been sitting in my drafts folder since ... like two years ago.

First of all, OSX claims .local for Bonjour and will treat them differently, so use .dev or something instead.

To add a host called myapp.dev and point it to localhost, just do this:

sudo dscl localhost -create /Local/Default/Hosts/mydev.dev IPAddress 127.0.0.1

To see all the currently defined hosts and their IPs:

sudo dscl localhost -list /Local/Default/Hosts IPAddress

And to remove a host:

sudo dscl localhost -delete /Local/Default/Hosts/mydev.dev

if you declare both a IPv4 and IPv6 address in /etc/hosts for a .dev domain like so:

27.0.0.1 myapp.dev ::1 myapp.dev

Then it should work correctly.

References:

http://itand.me/mac-os-x-lion-local-domains-and-etchosts-oh-m

https://github.com/icebourg/itandme-archive/blob/master/posts/2011/08/mac-os-x-lion-local-domains-and-etchosts-oh-m.html

http://www.justincarmony.com/blog/2011/07/27/mac-os-x-lion-etc-hosts-bugs-and-dns-resolution/

#how to #osx #/etc/hosts

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Douglas Engelbart's "Mother of All Demos"

In 1968, after 4 years of research and development Douglas Engelbart first demonstrated several of the technologies that would go on to affect our everyday life.

He conceptualized the first computer mouse, which was then constructed by Bill English. He and his team demonstrated the first graphical user interfaces, chorded keyboards, bitmap (graphical) display monitors, hypertext, as well as showcasing many other recent innovations in technology.

They envisioned a world of computers where everyone had access to them, and it was his mission to make the world a better place through technology.

In 1950, when he was 25 years old he said "I realized that I didn't have any more goals than a steady job, getting married and living happily ever after," and this bothered him, he started pondering "How can my career maximize my contribution to mankind?" finally he came to a conclusion recalling "I thought, 'Damn, I never realized the world is so complicated. If we don't improve our ability to deal collectively with complex things, as the problems grow more urgent, we're in trouble."'

In the 1950s there were no personal computers, they were hulking machines that filled entire buildings and staffed by dozens of workers, interfacing with the outside world through ticker tape and punch cards, but Douglas had a different vision of the future, recalling his work as a radar technician in World War II, he imagined "people sitting in front of displays, 'flying around' in an information space".

"Cyberspace" as a word wouldn't be coined for another 30+ years, yet this passing thought in Douglas's head is clearly the birth of the idea itself.

Below are high quality digital videos of the three black and white film reels recorded at Doug's "Mother of All Demos" in 1968.

Reel 1 : http://archive.org/details/XD300-23_68HighlightsAResearchCntAugHumanIntellect

Reel 2 : http://archive.org/details/XD300-24_68HighlightsAResearchCntAugHumanIntellect

Reel 3 : http://archive.org/details/XD300-25_68HighlightsAResearchCntAugHumanIntellect

Also, there's a low quality streaming version of the entire video provided by The Stanford University MouseSite, however, its much easier to read the text and see whats going on in the high quality versions.

References/Further Reading:

http://en.wikipedia.org/wiki/The_Mother_of_All_Demos

http://www.dougengelbart.org/firsts/dougs-1968-demo.html

http://www.siliconvalley.com/ci_23592605

http://archive.org/details/dougengelbartarchives

The New Powerline: Vim, Tmux, Bash, Zsh Statuslines

See my post on github: http://acook.github.com/powerline ====

Access Growl's log on OSX

Open a terminal and drop this in: touch ~/Library/Logs/Growl.log defaults write com.Growl.GrowlHelperApp GrowlLoggingEnabled -bool YES defaults write com.Growl.GrowlHelperApp GrowlLogType 1 defaults write com.Growl.GrowlHelperApp "Custom log history 1" $HOME/Library/Logs/Growl.log Thank you'll find the log file at `$HOME/Library/Logs/Growl.log` and you can parse it or do whatever, like display messages on your desktop with GeekTools or something. :A

How to kill an SSH session to a remote server

Often I'm using SSH and my connection drops, or I close my laptop and it disconnects from the wifi. When I get back to my SSH sessions, its locked and unresponsive. Eventually it will time out, but it takes a while. Enter SSH Escape Characters. They only work immediately after a newline, and all start with a tilde. The disconnect character is the period (or dot). So all you have to do is: [enter]~. And voila, it'll end your session without `kill` or closing your terminal. Here's a complete list of escape characters from the SSH man page: . Disconnect. ^Z Background ssh. # List forwarded connections. & Background ssh at logout when waiting for forwarded connection / X11 sessions to terminate. ? Display a list of escape characters. B Send a BREAK to the remote system (only useful for SSH protocol version 2 and if the peer supports it). C Open command line. Currently this allows the addition of port forwardings using the -L, -R and -D options (see above). It also allows the cancellation of existing remote port-forwardings using -KR[bind_address:]port. !command allows the user to execute a local command if the PermitLocalCommand option is enabled in ssh_config(5). Basic help is available, using the -h option. R Request rekeying of the connection (only useful for SSH protocol version 2 and if the peer supports it). :A (gleaned from http://www.cyberciti.biz/faq/openssh-linux-unix-osx-kill-hung-ssh-session/)

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Postgres on OSX issues

So I was running into this obnoxious error: psql: FATAL: role "postgres" does not exist No matter what I did. It basically means that the user is missing. So I had to create the user by hand. First I initialized the database as my current user: initdb -D /usr/local/pgsql/data And then I made sure the daemon was running: postgres -D /usr/local/pgsql/data >logfile 2>&1 & Then I opened a postgres terminal: psql template1 And created the postgres user: create user postgres with password ''; Finally, I gave the postgres user superuser privileges so it can create databases and whatever in my development environment. alter role postgres with superuser; Done!

I'm going to forget this next time it happens, so I'm putting here for posterity. Navigate to "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\HID", and look for an entry that resembles "VID_..." Open the "Device Parameters" key under each child entry and reverse the boolean value for the "FlipFlopWheel".

cdixon-deactivated20191029

anthonymcook

Things startups do need

Sunny office

Windows that open

Democratically controlled music system

Two forms of internet access

Beer on fridays

EVDO cards

Video game system

Good coffee maker

Proximity to public transportation

Proximity to park

Heating that goes all night

Health care plans...

Make, Colons, and Paths: A Journey Through Hell

tl;dr: If you use timestamps on your deploys, make sure they don't contain colons or anything using `make` will explode. ---- We were running into this error while running `bundle install` on Ubuntu: /usr/local/rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb checking for ffi.h... no checking for ffi.h in /usr/local/include... no checking for rb_thread_blocking_region()... yes checking for ruby_native_thread_p()... yes checking for rb_thread_call_with_gvl()... yes creating extconf.h creating Makefile make Makefile:158: *** target pattern contains no `%'. Stop. The confusing part was when we ran `gem install ffi` it ran without a problem. Googling around told us nothing about why ffi would be failing to build. We had run across [a post about QT](http://lists.trolltech.com/qt-interest/2005-02/thread01024-0.html) where a similar error was encountered. Then I found a [StackOverflow question](http://stackoverflow.com/questions/2052406/escaping-colons-in-filenames-in-a-makefile) which references [a GNU mailing list thread](http://www.mail-archive.com/[email protected]/msg03318.html) that explains the complete impossibility of `make` being able to parse a Makefile containing colons. It turns out we *did* have colons in the filename: We were using %T in the timestamps on our integration server, thus `make` was choking. The fix was simple, we just replaced the %T with a non-colon-delimited time string and everything worked just fine. Done! :A

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Completely remove Xcode from OSX Lion

First you want to try running this:

sudo /Developer/Library/uninstall-devtools -mode=all sudo rm -rf /Developer

Repeat above for any other directories beginning with Developer in your root directory. For some reason I had two: Developer and Developer-3.2.6.

Some systems may have a /Library/Developer/Shared directory also, so make sure you check for that directory, it will have its own uninstall-devtools script.

After that delete the install app (this will make sure the AppStore knows its been uninstalled):

sudo rm -rf /Applications/Install Xcode.app

Some people may also find deleting the AppStore cache helps, but only do this if the above doesn't work, remember to replace "your username" with the actual directory name:

sudo rm -rf /Library/Caches sudo rm -rf /User/your username/Library/Caches/com.apple.appstore

Done!

And let me know if you have any other tips.

Set up and deploy your Rails app to Heroku

Heroku is a great tool to deploy your applications to the cloud. Heroku is free for small applications, and scales up very easily. It also removes a lot of the hassles of production configuration and deployment so you can get in there and code.

Prerequisites

You must have a Heroku account.

You'll need an initialized git repo for your app.

Your app will need to have the pg and heroku gems installed.

Create App, Add Remote, Push Code

Replace "appname" in the following examples with the name of your application, or some other mnemonic placeholder.

$ heroku apps:create appname --stack cedar

$ git remote add heroku [email protected]:appname.git

$ git push heroku

Done!

Troubleshooting

If you run into any issues, make sure the Heroku gem is configured with your credentials.

Pay close attention to the output when you try to git push heroku, it'll give you the play-by-play of each step in the deployment process.

Check heroku logs to see what the errors are if you're getting 500s when you try to access your application in production. I use heroku logs -f to watch logged information in real-time as it comes in (hit control-c to stop).

⦂∀

HTML5 and Client-side Storage Stack

I'm resurrecting an old project of mine now that technology has caught up with my ideas. Even so, it's amazing how much time I've had to spend just trying to find the right tools to use to fulfill my requirements. What requirements are those exactly? ====== - **Cross-Browser**: Needs to work in every modern browser, including mobile. - **Persistant offline storage**: In order to support all browsers I must also support the following technologies: - IndexedDB - WebSQL - localStorage - Some fallback if none of the above are available.. - **Gracefully degrade** functionality on less capable browsers. - Encourage users to **modernize** their web experience. - **Optimize** layout according to the viewable space in the browser. - **Sane**, consistant starting point for styling pages. - A **clean**, extensible way of interacting with Javascript. What tools are you using to reach those goals? ====== - [Initializr](http://www.initializr.com/) - Provides a nice frontend scaffold: - [Modernizr](http://www.modernizr.com/): Detect browser capabilities. - [Jquery](http://jquery.com/): Improves and tidies interactions with Javascript objects. - [Respond.js](https://github.com/scottjehl/Respond#readme): Responsive web, layout optimized to viewable space. - [HTML5Boilerplate](http://html5boilerplate.com/): Sane and consistant default stylesheet. - [Lawnchair](http://westcoastlogic.com/lawnchair/): Provides a cohesive API for client-side offline storage. What about server-side tech? ====== Right now I'm using some other tools to create a functional prototype of the user experience: - [Frank](https://github.com/blahed/frank#readme): A static website generator. - [Haml](http://haml-lang.com/): Because HTML's syntax sucks. - [Sass](http://sass-lang.com/): Because CSS's syntax both sucks and is lacking in many areas. - [Mustache](http://mustache.github.com/): Because logic doesn't belong in views. - Frank is having issues loading Mustache templates, even after I spent some time [hacking](https://github.com/acook/frank) at it. - [Coffeescript](http://jashkenas.github.com/coffee-script/): Because Javascript is great, but its syntax sucks. I'm not sold on Frank yet, there was some other static site generators I was considering so if Frank starts getting in my way I'll give them a try. ⦂∀

Getting more information about Ruby Objects

Been working a good chunk of the day with analyzing Ruby objects in Pry, and realized I needed more information. So I wrote a module that can be included on Object that recursively inspects the internal structure of objects.

Output of RSpec::Rails.contents above. I've since renamed the method, but the output is very similar.

Take a look at the code up on Gist.

⦂∀

I generated an [Ablaze.js](http://theorigin.net/ablazejs/) image using another generated image composed of photos of my Facebook friends as the color map. [Ablaze.js](http://theorigin.net/ablazejs/) was created by [Patrick Gunderson](http://pat.theorigin.net/).

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CMDR: Command Ruby

This is just an idea, its not even a "thing" yet, but here's some of the ideas that have been stewing in my skull for some time now. Hasn't this been done before? ------ Before even glancing at this project, check out [Pry](https://github.com/pry/pry), [Rubbish](https://github.com/hayeah/rubish), and [Rush](http://rush.heroku.com/). They're all complete, functional, and probably do what I'm going to do here a lot better. Pry in particular in incredible. For the moment I have rather different goals though. Rather Different Goals? ------ So here's the deal, years ago I read about the new fancy-shmancy [Monad](http://en.wikipedia.org/wiki/Windows_PowerShell "Yes I still call it Monad because it was an awesome name, dammit!"). It's goal, as I understood it boiled down to *commands as objects*. It was a fantastc concept. Naturally, as it has with many things, Microsoft failed to deliver (at least in my opinion, but looking at some of the Windows 8 Server tools might change that..). And again, as it often does, the [Oberon](http://en.wikipedia.org/wiki/Oberon_(programming_language) "AKA: The most badass shit no one has heard of.") system did it first and better. I actually used the Oberon OS long before Monad was even thought of, but Monad is a more visible example. In both cases they assumed the underlying system was also an object system and then gave you immense power over those elements, accessible from the commandline just like a standard shell. Currently, I'm not working on my own operating system (yet) so I have so such luxury. However, unixy systems such as Linux, OS X, BSD, Hurd, and others provide a lot of process-level information and documentation that is exceedingly simple to access and parse (once you know where to look..). Are you getting the point any time soon? ------ I'd like to encapsulate commands and external processes as objects and replace most built-in bash commands with more object-oriented (and prettier) versions. Really not that complex at its most basic, but believe me, it'll get complicated fast. See below for some examples of the shiny functionality I'd like it to have. Fine, I can't endorse this endevour, but I am curious what it looks like. ------ Alright, well met me give you a couple of examples of what I'd like to be able to do with cmdr. *this is all pseudocode at the moment* - Commands are persistant objects that retain attributes *(yes this could get huge, there will be limits, don't worry)* $ ls .git/ README.markdown $ hist 1 ls $ hist.raw [ #, {command: 'ls', output: [#], status: #, type: External, start_time: 011-08-24 00:27:59 -0700, exit_time: 011-08-24 00:27:59 -0700}, {command: 'hist', output: [#], status: Success, type: Internal, start_time: 011-08-24 00:28:02 -0700, exit_time: 011-08-24 00:28:03 -0700}, {command: 'hist.raw', output: [], status: Running, type: Internal, start_time: 011-08-24 00:28:05 -0700, exit_time: nil} ] $ cmdhist[1].output .git/ README.markdown - Robust directory history $ cd ~ $ cd / $ cd.hist pwd / 1 ~ 2 /home/acook/pork/cmdr $ back ~ $ pwd /home/acook $ cd.hist 0 / pwd ~ 1 ~ 2 /home/acook/pork/cmdr $ fore / $ pwd / - Easily overridable default command options *(much like what aliases are often used for in bash)* $ ls.opts.defaults << '1' $ ls .git/ README.markdown $ ls.opts.only :b .git/ README.markdown - Session environment persistance $ x = 1 x = 1 $ ls .git/ README.markdown $ exit # exit cmdr sh-3.2$ cmdr # rerun cmdr from sh cmdr v0.1 $ hist 1 x = 1 2 ls 3 exit $ x => 1 Who came up with this harebrained idea anyway? ------ **Anthony M. Cook** *2011* - @anthony_m_cook / http://anthonymcook.com / http://github.com/acook

Get the delete key working in IRB on OSX with two lines of code

Its been driving me nuts. The delete key doesn't work in IRB (or Pry) on OSX!

ed: I mean forward-delete not backspace: function+delete on my work MBP and the normal delete key above the arrows on my shiny Das Keyboard.

Anyway, today I took a couple of minutes and tried this:

brew install readline rvm install 1.9.2 --with-readline-dir=/usr/local/Cellar/readline/6.2.1

It works now. That's seriously all I had to do. No patching required!

This is like the day I got the number pad working in all of Vim on OSX. And that was a wonderful day!

Its possible that installing readline with rvm might have the same effect, but I wanted readline to be readily available to other applications I installed as well.

(use whatever the current version of readline is for you. Do "ls /usr/local/Cellar/readline/" to find it)

⦂∀

#osx #ruby #irb #readline #mac #rvm #brew #pry

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