lxneng

collection = db.getCollection('foo')
result = collection.aggregate( 
 [
                {"$group": { "_id": { fa: "$fa", fb: "$fb" } } }
            ]
        );
printjson(result);

hardware

#######################
## GENERALS SETTINGS ##
#######################

smtpd_banner         = $myhostname ESMTP $mail_name (Debian/GNU)
biff                 = no
append_dot_mydomain  = no
readme_directory     = no
delay_warning_time   = 4h
mailbox_command      = procmail -a "$EXTENSION"

mwf

A small tutorial for how to set up Git Server on Mac OS X. The main dificulty was to create a "system" user (aka "daemon", uid<=500) and allow ssh login for it.

1. I need 'git'-user to be system - not visible in standart users list.
2. I need to allow ssh access only for some users/groups.

The tutorial for Git server setting up - http://git-scm.com/book/ca/Git-on-the-Server-Setting-Up-the-Server

So I need to create system user 'git' with homefolder.

System user creation script - http://serverfault.com/a/532860. I've modified it a little and uploaded here https://gist.github.com/mwf/20cbb260ad2490d7faaa#file-create_sys_user-sh.

kwk

No problem,

run

git filter-branch --msg-filter "cat - && echo && echo 'Signed-off-by: Your Name <Your.Name@example.com>'" HEAD~2..HEAD

To sign-off the last two commits.

Then force to push them to the remote repo with the -f option:

chrisjacob

gem 'rails', '4.1.1'

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
gem 'jquery-turbolinks'

# Gems for twitter LESS -> CSS and JS support
gem 'execjs'

yannvery

Install a new ruby version with chruby

OSX

First of all you must update ruby-build to update definitions list.

brew update

And update ruby-build

17twenty

For those of you who want to try out systemd-networkd, you can read on, and find out in this tutorial how to switch from NetworkManager to systemd-networkd on Linux.

Requirement systemd-networkd is available in systemd version 210 and higher. Check the version of your systemd before proceeding.

$ systemctl --version

Switch from Network Manager to Systemd-Networkd

It is relatively straightforward to switch from Network Manager to systemd-networkd (and vice versa).

johngerome

```
ERROR: Error installing compass:
ERROR: Failed to build gem native extension.

    current directory: /var/lib/gems/2.1.0/gems/ffi-1.9.10/ext/ffi_c
/usr/bin/ruby2.1 -r ./siteconf20151118-18985-1l1bsx7.rb extconf.rb
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h

extconf failed, exit code 1

aeris

#!/bin/bash

case "$1" in
hpkp)
        case "$2" in
        key)
                openssl rsa -in "$3" -outform der -pubout 2>/dev/null | openssl dgst -sha256 -binary | openssl enc -base64
                ;;
        csr)
                openssl req -in "$3" -pubkey -noout | openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -binary | openssl enc -base64

arno-di-loreto

Open API Specification (fka Swagger Specification) tutorial

All these Gist files are explained on my Open API Specification (fka Swagger Specification) tutorial on API Handyman blog.

The tutorial

This tutorial is composed of several posts, here are the posts links and files used for each one:

• Part 1: Introduction
  • A JSON specification
  • A YAML specification
• Part 2: The basics