Bizare issue on OS X 10.6 effecting both Mail and Thunderbird. Mail simply fails to download inbox, silently without error – helpful. Thunderbird reports “server email@example.org has disconnected. The server may have gone down or there may be a network problem”
Cause avast email virus scanner. Solution. Disable email virus scanner.
grep "Commandline: apt-get install" /var/log/apt/history.log Commandline: apt-get install emacs Commandline: apt-get install aptitude Commandline: apt-get install openjdk-7-jdk Commandline: apt-get install libxss1 Commandline: apt-get install gradle Commandline: apt-get install ruby Commandline: apt-get install nodejs Commandline: apt-get install gimp imagemagick Commandline: apt-get install git Commandline: apt-get install ruby-bundler Commandline: apt-get install libproj-dev Commandline: apt-get install libmagickwand-dev Commandline: apt-get install apache2 libapache2-mod-php5 Commandline: apt-get install yui-compressor Commandline: apt-get install optipng Commandline: apt-get install libimage-exiftool-perl Commandline: apt-get install etherwake Commandline: apt-get install pdftk Commandline: apt-get install sendmail Commandline: apt-get install nmap Commandline: apt-get install sharutils Commandline: apt-get install php5-curl Commandline: apt-get install android-tools-adb android-tools-fastboot Commandline: apt-get install ruby2.0 Commandline: apt-get install ruby-bundler Commandline: apt-get install libssl-dev Commandline: apt-get install libreadline6-dev Commandline: apt-get install curl Commandline: apt-get install libpq-dev Commandline: apt-get install gource
… and which ones you’ve removed…
grep "Commandline: apt-get remove" /var/log/apt/history.log Commandline: apt-get remove unity-lens-video unity-lens-photos unity-lens-music unity-lens-friends unity-lens-files Commandline: apt-get remove ubuntuone-client Commandline: apt-get remove cups Commandline: apt-get remove telepathy-indicator Commandline: apt-get remove unity-scope-home Commandline: apt-get remove cups-browsed Commandline: apt-get remove modemmanager Commandline: apt-get remove indicator-bluetooth indicator-keyboard indicator-messages indicator-power Commandline: apt-get remove evolution-data-server Commandline: apt-get remove colord Commandline: apt-get remove zeitgeist
In Ubuntu 13.10 I notice the trackpad freezes on occasion. This is my hacky solution for getting it going again without a reboot
sudo rmmod psmouse sudo modprobe psmouse
I was originally using mod_deflate however I had the following issues
Things to note. The header content-encoding gzip is only set if the environment variable GZIP is set true. The check however is made against REDIRECT_GZIP. This is just how environment variables work within rewrite conditions – set a variable called FOO and then check against the variable with a REDIRECT_ prefix, i.e. REDIRECT_FOO.
ForceType application/json
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP:Accept-Encoding} gzip
RewriteCond %{REQUEST_FILENAME}.gz -f
RewriteRule ^(.+)$ $1.gz [L,E=GZIP:true]
Header set Content-Encoding gzip env=REDIRECT_GZIP
</IfModule>
Also important is the Vary: Accept-Encoding. This means that different clients going through the same proxy will behave correctly. Some might support gzip, some might not.
<IfModule mod_headers.c> Header append Vary: Accept-Encoding </IfModule>
Jasmine 2.0 provides a JavaScript unit test framework, RequireJS provides a dependency modelling/loading and Blanket provides native in-browser JavaScript code coverage – no need for a coverage server etc. So why not use all three together, well, it’s kind of tricky and kept me busy all evening.
I’m going to provide a small but scalable standalone example rather than getting bogged down in the details of my current project
First job is to setup the project structure. There are many possible approaches. I think the most important things are – have both development and minified third party libraries, keep third party libraries in a separate tree and have the same “package” structure for both code and tests.
. ./js ./js/main.js <== Entry point ./js/app.js <== Application main class ./js/config.js <== RequireJS config ./js/model <== Application code ./js/model/bar.js ./js/view ./js/view/foo-view.js ./templates <== Underscore templates ./templates/foo-view.html ./js/third-party ./js/third-party/underscore-min.map ./js/third-party/jquery-2.1.0.js ./js/third-party/backbone-1.1.0.js ./js/third-party/require-2.1.11.js ./js/third-party/require-2.1.11.min.js ./js/third-party/backbone-1.1.0.min.js ./js/third-party/jasmine-blanket-1.1.5.js ./js/third-party/underscore-1.6.0.min.js ./js/third-party/blanket-1.1.5.js ./js/third-party/blanket-1.1.5.min.js ./js/third-party/backbone-min.map ./js/third-party/jquery-2.1.0.min.js ./js/third-party/underscore-1.6.0.js ./js/text.js <== RequireJS plugin for templates. Needs to be at the top level ./test ./test/spec ./test/spec/model ./test/spec/model/bar-test.js ./test/spec/view ./test/spec/view/foo-view-test.js ./test/spec-runner.js ./test/jasmine-2.0.0 <== Jasmine 2.0.0 release ./test/jasmine-2.0.0/jasmine.js ./test/jasmine-2.0.0/boot.js ./test/jasmine-2.0.0/console.js ./test/jasmine-2.0.0/jasmine_favicon.png ./test/jasmine-2.0.0/jasmine-html.js ./test/jasmine-2.0.0/jasmine.css ./css ./img ./spec-runner.html ./index.html
I placed the RequireJS configuration in a single file to allow it to be reused between the main application page and the jasmine tests. This would also allow reuse between multiple pages if you needed.
define([], function() {
requirejs.config({
baseUrl : 'js',
paths : {
jquery : 'third-party/jquery-2.1.0.min',
underscore : 'third-party/underscore-1.6.0.min',
backbone : 'third-party/backbone-1.1.0.min',
templates : '../templates'
},
shim : {
backbone : {
deps : [ 'underscore', 'jquery' ],
exports : 'Backbone'
},
underscore : {
exports : '_'
}
}
});
});
The application entry point main.js has a require on the config.js file and then initializes the application class. Note the use of nested requires. If you’re building with node.js you’ll need to use the findNestedDependencies = true option.
requirejs.config({
baseUrl : 'js',
});
require([ 'config' ], function() {
require([ 'app', 'jquery'], function(App, $) {
$(document).ready(function() {
new App().initialize();
});
});
});
The main HTML is very simple, just a script with src of require.js with the data-main attribute pointing to the entry point file.
<!DOCTYPE html> <html> <head> <title>Jasmine 2.0 + RequireJS + Blanket example</title> <meta charset="UTF-8" /> <script data-main="js/main" src="js/third-party/require-2.1.11.min.js"></script> </head> <body> </body> </html>
The jasmine spec runner uses the same config.js as the main application, this reduces any copy-and-paste and ensures the tests run with the same set of third-party libraries as the main application.
Note again the nested require() as with the main entry point.
requirejs.config({
baseUrl : 'js'
});
require([ 'config' ], function() {
requirejs.config( ... );
require([ 'jquery', 'jasmine-boot', 'jasmine-blanket' ], function($, jasmine, blanket) {
....
});
});
The spec runner then adds more test specific configuration to requirejs, this does not overwrite the requirejs.config() call in config.js, it simply merges with it.
requirejs.config({
paths : {
'jasmine' : '../test/jasmine-2.0.0/jasmine',
'jasmine-html' : '../test/jasmine-2.0.0/jasmine-html',
'jasmine-boot' : '../test/jasmine-2.0.0/boot',
'spec' : '../test/spec',
'blanket' : 'third-party/blanket-1.1.5.min',
'jasmine-blanket' : 'third-party/jasmine-blanket-1.1.5',
},
Jasmine 2.0 uses a bootstrap file called boot.js. Note the shim config to setup the correct dependencies.
shim : {
'jasmine-boot' : {
deps : [ 'jasmine', 'jasmine-html' ],
exports : 'jasmine'
},
'jasmine-html' : {
deps : [ 'jasmine' ]
},
'jasmine-blanket' : {
deps : [ 'jasmine-boot', 'blanket' ],
exports : 'blanket'
}
}
Setting up blanket is usually straightforward using attributes data-cover and data-cover-only on the script tags. However since we’re loading all our dependencies via requirejs we don’t have that option. Instead we configure blanket programatically using blanket.config() calls.
The blanket-jasmine adapter at time of writing does not quite support jasmine 2.0 due to some API changes. I used the patch from stackoverflow.com/questions/21420291/blanketjs-jasmine-2-0-not-working to fix it up.
require([ 'jquery', 'jasmine-boot', 'jasmine-blanket' ], function($, jasmine, blanket) {
// blanket.options('debug', true);
// include filter
blanket.options('filter', 'js/');
// exclude filter
blanket.options('antifilter', [ 'js/third-party', '../test/spec/', 'js/text.js' ]);
blanket.options('branchTracking', true);
Another funny issue with jasmine 2.0 is the use of the window.onload callback in boot.js to kick the tests off. Therefore we call it manually, wrapped with a jQuery document ready callback to ensure the DOM is loaded.
Loading the individual spec js files is easy, we just push them into an array and require() that first
var specs = [];
specs.push('spec/view/foo-view-test');
specs.push('spec/model/bar-test');
$(document).ready(function() {
require(specs, function(spec) {
window.onload();
});
});
Putting it all together…
requirejs.config({
baseUrl : 'js'
});
require([ 'config' ], function() {
requirejs.config({
paths : {
'jasmine' : '../test/jasmine-2.0.0/jasmine',
'jasmine-html' : '../test/jasmine-2.0.0/jasmine-html',
'jasmine-boot' : '../test/jasmine-2.0.0/boot',
'spec' : '../test/spec',
'blanket' : 'third-party/blanket-1.1.5.min',
'jasmine-blanket' : 'third-party/jasmine-blanket-1.1.5',
},
shim : {
'jasmine-boot' : {
deps : [ 'jasmine', 'jasmine-html' ],
exports : 'jasmine'
},
'jasmine-html' : {
deps : [ 'jasmine' ]
},
'jasmine-blanket' : {
deps : [ 'jasmine-boot', 'blanket' ],
exports : 'blanket'
}
}
});
require([ 'jquery', 'jasmine-boot', 'jasmine-blanket' ], function($, jasmine, blanket) {
// blanket.options('debug', true);
// include filter
blanket.options('filter', 'js/');
// exclude filter
blanket.options('antifilter', [ 'js/third-party', '../test/spec/', 'js/text.js' ]);
blanket.options('branchTracking', true);
var jasmineEnv = jasmine.getEnv();
jasmineEnv.addReporter(new jasmine.BlanketReporter());
jasmineEnv.updateInterval = 1000;
var specs = [];
specs.push('spec/view/foo-view-test');
specs.push('spec/model/bar-test');
$(document).ready(function() {
require(specs, function(spec) {
window.onload();
});
});
});
});
This is simple, just require.js and a pointer to the spec runner entry point
<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Jasmine Spec Runner v2.0.0</title> <link rel="shortcut icon" type="image/png" href="test/jasmine-2.0.0/jasmine_favicon.png"> <link rel="stylesheet" type="text/css" href="test/jasmine-2.0.0/jasmine.css"> <script data-main="test/spec-runner" src="js/third-party/require-2.1.11.min.js"></script> </head> <body> </body> </html>
The tests each use require() to load the classes they wish to test.
define([ 'model/bar' ], function(Bar) {
describe("data access", function() {
var model = {};
beforeEach(function() {
model = new Bar([ {
type : 'cow',
size : 1
}, {
type : 'horse',
size : 2
} ]);
});
it("can search by type", function() {
expect(model.findByType('horse')[0].get('size')).toBe(2);
});
});
});
To enable wake on lan (WOL) magic packets with an O2 wireless router you need to change the routing table entry from dynamic to static, this means the entry is always present so the router recognises the IP even when the target machine is switched off. This is true for pretty much all consumer DSL routers.
Login using SuperUser and password printed on the O2 router
telnet 192.168.1.254 Trying 192.168.1.254... Connected to o2wirelessbox.lan. Escape character is '^]'. Username : SuperUser Password : < password from label on router >
Now use the IP tool to delete and re-add the routing table entry
{SuperUser}=>ip
{SuperUser}[ip]=>arplist
{SuperUser}[ip]=>:ip arplist
Interface IP-address HW-address Type
2 LocalNetwork 192.168.1.51 12:34:56:78:9a:bc DYNAMIC < this is one we want to make static
2 LocalNetwork 192.168.1.60 12:34:56:78:9a:bd DYNAMIC
Now physically disconnect the machine you wish to make static, otherwise it will keep getting added as dynamic.
{SuperUser}[ip]=>arpdelete
intf = LocalNetwork
ip = 192.168.1.51
[hwaddr] = 12:34:56:78:9a:bc
:ip arpdelete intf=LocalNetwork ip=192.168.1.51 hwaddr=12:34:56:78:9a:bc
{SuperUser}[ip]=>arplist
Interface IP-address HW-address Type
2 LocalNetwork 192.168.1.60 12:34:56:78:9a:bd DYNAMIC
Now add again using same details
{SuperUser}[ip]=>arpadd
intf = LocalNetwork
ip = 192.168.1.51
[hwaddr] = 12:34:56:78:9a:bc
:ip arpadd intf=LocalNetwork ip=192.168.1.51 hwaddr=12:34:56:78:9a:bc
{SuperUser}[ip]=>arplist
Interface IP-address HW-address Type
2 LocalNetwork 192.168.1.51 12:34:56:78:9a:bc STATIC < now static :)
2 LocalNetwork 192.168.1.60 12:34:56:78:9a:bd DYNAMIC
class CoordinatesCalc
def CoordinatesCalc.offset_coordinate(lat_deg, lon_deg, distance_m, bearing_deg)
r = 6371000.0;
lat = lat_deg * Math::PI / 180
lon = lon_deg * Math::PI / 180
bearing = bearing_deg * Math::PI / 180
distance_by_r = distance_m / r
lat2 = Math.asin( Math.sin(lat) * Math.cos(distance_by_r) +
Math.cos(lat) * Math.sin(distance_by_r) *
Math.cos(bearing) )
lon2 = lon + Math.atan2(Math.sin(bearing) * Math.sin(distance_by_r) * Math.cos(lat),
Math.cos(distance_by_r) - Math.sin(lat) * Math.sin(lat2))
[180.0 * lat2 / Math::PI, 180.0 * lon2 / Math::PI]
end
def CoordinatesCalc.dms(d, m, s)
d + m / 60.0 + s / 3600.0
end
def CoordinatesCalc.dms_to_s(dms)
d = dms.floor
m = (60 * (dms - d)).floor
dm = d + (m / 60.0)
s = (3600.0 * (dms - dm)).floor
d.to_s + " " + m.to_s + " " + s.to_s
end
end
r = CoordinatesCalc.offset_coordinate(CoordinatesCalc.dms(53,19,14),
CoordinatesCalc.dms(-1, -43, -47),
124800.0,
CoordinatesCalc.dms(96, 1, 18))
puts CoordinatesCalc.dms_to_s(r[0])
puts CoordinatesCalc.dms_to_s(r[1])
Build ruby from source. RVM won’t work out of the box because it tries to use sudo. It’s quite easy.
cd mkdir build cd build http://cache.ruby-lang.org/pub/ruby/2.0/ruby-2.0.0-p247.tar.gz tar xzf ruby-2.0.0-p247.tar.gz cd ruby-2.0.0-p247 ./configure --prefix /home/adamish/ruby # <=== make sure you install to your own home directory make install
Make your custom ruby default. Add the following to your ~/.bash_profile
export GEM_HOME="$HOME/.gems" export GEM_PATH="$GEM_HOME" export PATH=~/ruby/bin:$PATH
Install rails
gem install rails --no-document
Create dummy site for testing
rails new HorseApp mv HorseApp/* . # move to top level
Add following lines to Gemfile
# required for JS runtime gem 'therubyracer' # required for FCGI wrapper gem 'fcgi'
Install the new gems
bundle install
Create FCGI wrapper script – public/dispatch.fcgi
#!/home/adamish/ruby/bin/ruby
ENV['RAILS_ENV'] = 'development'
ENV['HOME'] ||= `echo ~`.strip
ENV['GEM_HOME'] = File.expand_path('~/.gems')
ENV['GEM_PATH'] = File.expand_path('~/.gems')
require 'fcgi'
require File.join(File.dirname(__FILE__), '../config/environment.rb')
class Rack::PathInfoRewriter
def initialize(app)
@app = app
end
def call(env)
env.delete('SCRIPT_NAME')
parts = env['REQUEST_URI'].split('?')
env['PATH_INFO'] = parts[0]
env['QUERY_STRING'] = parts[1].to_s
@app.call(env)
end
end
Rack::Handler::FastCGI.run Rack::PathInfoRewriter.new(HorseApp::Application)
Add following to .htaccess
<IfModule mod_fastcgi.c>
AddHandler fastcgi-script .fcgi
</IfModule>
<IfModule mod_fcgid.c>
AddHandler fcgid-script .fcgi
</IfModule>
Options +FollowSymLinks +ExecCGI
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ public/dispatch.fcgi/$1 [QSA,L]
ErrorDocument 500 "Rails application failed to start properly"
Try it out! You should see the standard “Welcome aboard – You’re riding Ruby on Rails!” development starter page.
Bus 001 Device 002: ID 046d:081b Logitech, Inc. Webcam C310
# Add following line to /usr/bin/zmdc.pl
$ENV{LD_PRELOAD} = '/usr/lib/x86_64-linux-gnu/libv4l/v4l1compat.so';
sudo service zoneminder restart
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --user-data-dir=$(mktemp -d /tmp/chrome-profile-XXXXX) --remote-debugging-port=9222
Add this update site http://chromedevtools.googlecode.com/svn/update/dev/
Google+