| # Hello, and welcome to makefile basics. | |
| # | |
| # You will learn why `make` is so great, and why, despite its "weird" syntax, | |
| # it is actually a highly expressive, efficient, and powerful way to build | |
| # programs. | |
| # | |
| # Once you're done here, go to | |
| # http://www.gnu.org/software/make/manual/make.html | |
| # to learn SOOOO much more. |
| create this file in your /root folder | |
| $ fleetctl load swapon.service | |
| $ fleetctl start swapon.service | |
| This will create swap file on all nodes of your CoreOS cluster without prior setup. | |
| See also http://cloudinit.readthedocs.org/en/latest/topics/examples.html#adjust-mount-points-mounted |
| /* Useful celery config. | |
| app = Celery('tasks', | |
| broker='redis://localhost:6379', | |
| backend='redis://localhost:6379') | |
| app.conf.update( | |
| CELERY_TASK_RESULT_EXPIRES=3600, | |
| CELERY_QUEUES=( | |
| Queue('default', routing_key='tasks.#'), |
This is a guide on how to email securely.
There are many guides on how to install and use PGP to encrypt email. This is not one of them. This is a guide on secure communication using email with PGP encryption. If you are not familiar with PGP, please read another guide first. If you are comfortable using PGP to encrypt and decrypt emails, this guide will raise your security to the next level.
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
I've been wanting to do a serious project in Go. One thing holding me back has been a my working environment. As a huge PyCharm user, I was hoping the Go IDE plugin for IntelliJ IDEA would fit my needs. However, it never felt quite right. After a previous experiment a few years ago using Vim, I knew how powerful it could be if I put in the time to make it so. Luckily there are plugins for almost anything you need to do with Go or what you would expect form and IDE. While this is no where near comprehensive, it will get you writing code, building and testing with the power you would expect from Vim.
I'm assuming you're coming with a clean slate. For me this was OSX so I used MacVim. There is nothing in my config files that assumes this is the case.
| # Idempotent way to build a /etc/hosts file with Ansible using your Ansible hosts inventory for a source. | |
| # Will include all hosts the playbook is run on. | |
| # Inspired from http://xmeblog.blogspot.com/2013/06/ansible-dynamicaly-update-etchosts.html | |
| - name: "Build hosts file" | |
| lineinfile: dest=/etc/hosts regexp='.*{{ item }}$' line="{{ hostvars[item].ansible_default_ipv4.address }} {{item}}" state=present | |
| when: hostvars[item].ansible_default_ipv4.address is defined | |
| with_items: groups['all'] |
| --- | |
| # This has been tested with ansible 1.3 with these commands: | |
| # ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts isFirstRun=false" | |
| # ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts isFirstRun=true" | |
| # ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts" | |
| # NB: The type of the variable is crucial! | |
| - name: Ansible Conditionals Examples | |
| hosts: $hosts | |
| vars_files: |
| // Just before switching jobs: | |
| // Add one of these. | |
| // Preferably into the same commit where you do a large merge. | |
| // | |
| // This started as a tweet with a joke of "C++ pro-tip: #define private public", | |
| // and then it quickly escalated into more and more evil suggestions. | |
| // I've tried to capture interesting suggestions here. | |
| // | |
| // Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_, | |
| // @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant, |
