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sudo apt-get install flex

Error: xcrun: error: active developer path ("/Applications/Xcode.app/Contents/Developer") does not exist Use sudo xcode-select --switch path/to/Xcode.app to specify the Xcode that you wish to use for command line developer tools, or use xcode-select --install to install the standalone command line developer tools. See man xcode-select for more details. xcrun: error: active developer path ("/Applications/Xcode.app/Contents/Developer") does not exist Use sudo xcode-select --switch path/to/Xcode.app to specify the Xcode that you wish to use for command line developer tools, or use xcode-select --install to install the standalone command line developer tools. See man xcode-select for more details. ...

Are you stuck with two Git repositories or branches that have completely different histories, but you need to merge them? You may be hitting a roadblock because Git is designed to prevent this kind of operation by default. However, there’s a workaround for this, and it’s simpler than you might think. The Problem: Unrelated Git Histories Imagine you’re working on a project where you have a main branch, and someone else has a completely separate project with its own history. Now, you want to combine both projects into a single repository. If you try to perform a regular git merge or git rebase, Git will likely stop you with an error message, something like: ...

What is the Ansible Provisioner in Packer? If you’re dabbling in the DevOps world, chances are you’ve come across Ansible and Packer. But how about combining them? The Ansible provisioner in Packer lets you run Ansible playbooks while creating your machine images. In simpler terms, it helps you set up your server environment automatically, just the way you like it, while Packer goes about its business creating a machine image. ...

Introduction SSHPass is a nifty little tool that lets you automate SSH login by bypassing the usual password prompt. While it’s super convenient for scripting, bear in mind that it’s not ideal for a multi-user setup due to security concerns. However, if you’re using it on your personal development machine, it’s pretty harmless. How to Install SSHPass on Ubuntu Installing SSHPass on Ubuntu is as straightforward as it gets. All you need to do is open up your terminal and run the following command: ...

What You Need Before You Begin Operating System Requirements First things first, make sure you’re running one of the following 64-bit Ubuntu versions to install Docker CE: Ubuntu 18.04 (Bionic) - LTS Ubuntu 17.10 (Artful) Ubuntu 16.04 (Xenial) - LTS Ubuntu 14.04 (Trusty) - LTS Docker CE is compatible with these architectures: x86_64, armhf, s390x (IBM Z), and ppc64le (IBM Power). Note: For IBM Z and Power architectures, you’ll need at least Ubuntu 16.04 (Xenial) or higher. ...

Looking at the architecture required by a project in isolation can be misleading and hides the need for a longer term product-level architecture, which is more strategic in nature than the project-level architecture.

It seems that perfection would be attained not when there is no longer anything to add, but when there is no longer anything to take away. —Antoine de St. Exupery, Terre des Hommes, 1939

Ultimately DevOps is an organizational transformation.

“We are called to be architects of the future, not its victims.” —R. Buckminster Fuller