nicksan2c

Bash array usage cheatsheet

Create array
Get elements
Append element
Get length
Iteration
Pass to function
Reference

Create array

1. Clone your fork:

git clone git@github.com:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream

Use Proxy for Git/GitHub

Generally, the Git proxy configuration depends on the Git Server Protocal you use. And there're two common protocals: SSH and HTTP/HTTPS. Both require a proxy setup already. In the following, I assume a SOCKS5 proxy set up on localhost:1080. But it can also be a HTTP proxy. I'll talk about how to set up a SOCKS5 proxy later.

SSH Protocol

When you do git clone ssh://[user@]server/project.git or git clone [user@]server:project.git, you're using the SSH protocal. You need to configurate your SSH client to use a proxy. Add the following to your SSH config file, say ~/.ssh/config:

ProxyCommand nc -x localhost:1080 %h %p

Restore access to a unifi controller

When you are unable to login to the unifi controller or forgot admin password, you can restore access using SSH and manipulating mongodb directly.

Warning

Do not uninstall unifi controller - most of the data is not stored in mongodb. In case you thought a mongodb backup would be sufficient, you may have fucked up already, just like me. However I managed to write this "tutorial" for anyone to not run into the same trap.

	#!/bin/bash
	sourcedir="$HOME/.local/src/"
	mkdir "$sourcedir"
	export CFLAGS='-march=native -O3 -pipe -fstack-protector -Wall'
	export CXXFLAGS='-march=native -O3 -pipe -fstack-protector -Wall'

	function install-dependencies() {
	# Install build tools and Mesa VDPAU support.
	sudo apt-fast install -y cmake yasm autoconf build-essential mesa-vdpau-drivers \
	libvdpau-va-gl1

	#!/usr/bin/env bash

	# gdrive_download
	#
	# script to download Google Drive files from command line
	# not guaranteed to work indefinitely
	# taken from Stack Overflow answer:
	# http://stackoverflow.com/a/38937732/7002068

	gURL=$1

	# Check existing
	- name: Ansible check file exists.
	stat:
	path: /etc/filename
	register: file_status
	- debug:
	msg: "File exists..."
	when: file_status.stat.exists
	- debug:
	msg: "File not found"

	---
	# SSH server settings, in line with https://stribika.github.io/2015/01/04/secure-secure-shell.html
	# Before using, change myhosts to your hosts' nickname and myuser to your username (two instances! make sure you replace both or you'll be locked out of ssh!)
	- hosts: myhosts
	become: true
	remote_user: myuser
	tasks:
	# Key exchange, ciphers and MACs
	- lineinfile: dest=/etc/ssh/sshd_config regexp='^KexAlgorithms' line='KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256'