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- ohmyposh

## Utilities tools
- [SessionBuddy](https://sessionbuddy.com/)

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sudo apt update
sudo apt install -y build-essential curl make git vim hub libssl-dev graphviz jq cmake clang pkg-config p7zip terminator gnome-tweaks fonts-firacode protobuf-compiler

# intune
sudo apt install libpam-pwquality
sudo nano /etc/pam.d/common-password
# password requisite         pam_pwquality.so retry=3 dcredit=-1 ocredit=-1 ucredit=-1 lcredit=-1 minlen=12

curl -sSl https://packages.microsoft.com/keys/microsoft.asc | sudo tee /etc/apt/trusted.gpg.d/microsoft.asc
wget https://packages.microsoft.com/config/ubuntu/20.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb

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Problem

I have two Github accounts: oanhnn (personal) and superman (for work). I want to use both accounts on same computer (without typing password everytime, when doing git push or pull).

Solution

Use ssh keys and define host aliases in ssh config file (each alias for an account).

How to?

1. Generate ssh key pairs for accounts and add them to GitHub accounts.

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#!/bin/bash

# Uninstalling Multi-User Nix
# Check `sudo systemctl status nix-daemon.service`

# removed the (non-working) service configuration and shell configuration
sudo systemctl disable nix-daemon.socket
sudo systemctl disable nix-daemon.service
sudo systemctl daemon-reload
rm -rf ~/.nix-*

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By Steve Yegge

Last week I accidentally posted an internal rant about service platforms to my public Google+ account (i.e. this one). It somehow went viral, which is nothing short of stupefying given that it was a massive Wall of Text. The whole thing still feels surreal.

Amazingly, nothing bad happened to me at Google. Everyone just laughed at me a lot, all the way up to the top, for having committed what must be the great-granddaddy of all Reply-All screwups in tech history.

But they also listened, which is super cool. I probably shouldn’t talk much about it, but they’re already figuring out how to deal with some of the issues I raised. I guess I shouldn’t be surprised, though. When I claimed in my internal post that “Google does everything right”, I meant it. When they’re faced with any problem at all, whether it’s technical or organizational or cultural, they set out to solve it in a first-class way.

Anyway, whenever something goes viral, skeptics start wondering if it was faked or staged. My accident

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Stevey's Google Platforms Rant

I was at Amazon for about six and a half years, and now I've been at Google for that long. One thing that struck me immediately about the two companies -- an impression that has been reinforced almost daily -- is that Amazon does everything wrong, and Google does everything right. Sure, it's a sweeping generalization, but a surprisingly accurate one. It's pretty crazy. There are probably a hundred or even two hundred different ways you can compare the two companies, and Google is superior in all but three of them, if I recall correctly. I actually did a spreadsheet at one point but Legal wouldn't let me show it to anyone, even though recruiting loved it.

I mean, just to give you a very brief taste: Amazon's recruiting process is fundamentally flawed by having teams hire for themselves, so their hiring bar is incredibly inconsistent across teams, despite various efforts they've made to level it out. And their operations are a mess; they don't real

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System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

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How to update the Go version

System: Debian/Ubuntu/Fedora. Might work for others as well.

1. Uninstall the exisiting version

As mentioned here, to update a go version you will first need to uninstall the original version.

To uninstall, delete the /usr/local/go directory by:

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Information in this Gist originally from this github issue, which is outdated.

As @RomanMinkin mentioned, you can also consider Casbin (https://github.com/casbin/casbin). It is the most starred authorization library in Golang. There are several differences between Casbin and OPA.

Feature	Casbin	OPA
Library or service?	Library/Service	Library/Service
How to write policy?	Two parts: model and policy. Model is general authorization logic. Policy is concrete policy rule.	A single part: Rego
RBAC hierarchy	Casbin supports role hierarchy (a role can have a sub-role)	Role hierarchies can be encoded in data. Also with the new graph.reachable() built-in function queries over those hierarchies are much more feasible now.
RBAC separation of duties	Not supported	Supported: two roles cannot be assigned together

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Hexagonal Architecture

Conceptualized by Alistair Cockburn. Also known as "Ports and Adapters".

In a nutshell:

Application Driver -> Primary Adapter -> Primary Port -> Use Case -> Secondary Port -> Secondary Adapter -> External System/Side Effect