Articles tagged 'devops'

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Host naming organisation for your local lab Jan 28 2020

There are many fields in Computer Science, and tech in general, where you'll want a lab with multiple VMs, containers, or even physical devices running various services. When learning networks, it's useful to have a local lab. Another example is when...

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Running Raspbian OS on QUEMU to learn ARM assembly Jan 19 2020

If you want to get into mobile security or reverse engineering, you'll get to a point when you would like to have access to an ARM processor. There are many devices you could use, but one very cheap (in price not in quality) is the Raspberry pi. You...

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Understanding Disk Images by building a macOS Catalina ISO image for VirtualBox [macOS] Dec 4 2019

Having a virtual machine running macOS opens up a lot of opportunities for learning. If you are into security, you can set up a VM for your security lab. Or if you want to learn networking or kernel debugging, it is also helpful to use a VM. The other...

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Automating build and TestFlight upload for simple iOS apps Aug 13 2019

Sometimes we only want to do the simplest of tasks of build and upload to TestFlight without having to spend much time doing lots of configuration. Maybe we are only testing a minimum viable product (MVP) and want to make it accessible to beta users...

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Understanding SSH Keys and using Keychain to manage passphrase on macOS Jul 3 2019

Accessing remote servers using passwords has been discouraged for a long time, and it is suggested to use SSH public keys as the authentication method. I've noticed that for some users, the setup and maintenance of their keys becomes a problem, so...

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Using Ansible to automate local tasks and setup Jun 19 2019

We can use an automation tool like Ansible to configure servers, set up CI/CD pipelines, and many more DevOpsy tasks.

This same tool can be used to maintain the setup of our day to day environment (as suggested by my friend Gerardo Santoveña) or automate...

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Xcode code structure - matching groups and filesystem May 24 2019

A folder structure makes it easy to navigate and understand any project. On Xcode, we can build the project structure using groups. The problem with this is that it doesn't reflect on the filesystem. What this means is that if we are looking at the...

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Basic developer setup Aug 20 2018

I have always been fascinated by other professions that have physical workshops, imagine a room full of neat rows of tools, with everything at hand, just having everything on its own places makes you want to create and build new things with your tools...

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Find command for the million Jul 29 2018

One of the most useful Unix commands, and mostly underutilized, is find. To get the most out of it there are two key features that we need to explore and understand.

  1. How to iterate over the results
  2. Limitation on the number of results we can operate...
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Git general workflow Jul 23 2018

The following is a basic git workflow that handles most users needs:

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Docker WordPress setup for local development Mar 2 2018

Development environment will use: WordPress latest - the image uses Apache MariaDB latest

I would like to keep the WordPress files in the host machine so I can tinker with them so we'll be using a mount defined by the environment variable: WPHOME

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Git branch cleanup after pull request Feb 24 2018

After merging a pull request Github shows the option to remove the branch that was merged, but that only removes the branch from the remote Github repo.

If you display all your branches in local( git branch -a ) you'll still see that the removed branch...

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