Current webkit browsers like Chrome and Safari have a special variable in their consoles that refers to the selected DOM...
Some modern Javascript APIs return iterators instead of arrays. In plain Javascript you can loop through an iterator using
To upload a file via AJAX (e.g. from an ) you need to wrap your params in a FormData object.
If you want to perform a failover on another haproxy backend server this is the way you should do it...
Brendan Gregg is the Linux performance god. Use the information in this link to find out what ways there are...
Chrome has discontinued support for 32-Bit Linux builds and this might break your apt-get update.
If you are on a Linux shell and want to open a file with whatever default application is configured for...
If you want to configure your nginx to drop connections to a specific location, you can do so by responding...
The following sums up all connections (ESTABLISHED, TIME_WAIT, FIN_WAIT, etc.) and sorts it: netstat -n | awk ' $5 ~ /^[0...
When you're facing a somewhat complex Google Analytics setup and want to find out what's happening, you can...
A HTTP 302 Found redirect to PATCH and DELETE requests will be followed with PATCH or DELETE. Redirect responses to...
To install gems Bundler needs to be able to talk to https://api.rubygems.org. If you are behind a proxy you...
During debugging you might pepper your code with lines like these: console.log('foo = ' + foo + ', bar = ' + bar) I recommend to use...
Geordi is now (partially) tested with Cucumber. Yay! geordi cucumber supports a new @solo tag. Scenarios tagged with @solo...
Using Scenic, you can bring the power of SQL views to your Rails application without having to switch your schema...
Note The maintenance mode is enabled on all application server as soon as the file /public/system/maintenance.html is present. Installation
You login to a Linux server with a performance issue: what do you check in the first minute? uptime
The nokogiri gem provides different packages for several platforms. Each platform-specific variant ships pre-built binaries of libxml2, e.g...
You can use proxy_hide_header in different contexts: Syntax: proxy_hide_header field; Default: — Context: http, server, location
The puppet server caches custom functions. If you edit an existing function (e.g. while you’re developing it), you’ll...
You can use mail-tester.com to check your application's e-mails for issues that might cause e-mails to be...
Note This card does not reflect the current state of lazy loading technologies. The native lazy attribute could be used...
Sometimes you just want to have a small web server that serves files to test something. Serve the current directory...
While you can use Apache as a reverse proxy, it tries to be too smart. Try nginx instead, it's...