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Starting from balanced:
(sys, eng, wep)
(1.5, 1.5, 3.0) = right
(1.5, 3.0, 1.5) = up
(3.0, 1.5, 1.5) = left
(1.0, 1.0, 4.0) = right, right
(2.5, 2.5, 1.0) = left, up
(1.0, 4.0, 1.0) = up, up
(2.5, 1.0, 2.5) = left, right
(4.0, 1.0, 1.0) = left, left

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How to install PhantomJS on Ubuntu

Version: 1.9.8

Platform: x86_64

First, install or update to the latest system software.

sudo apt-get update
sudo apt-get install build-essential chrpath libssl-dev libxft-dev

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MongoDB cheatsheet

Replica Set

Perform Maintenance on Replica Set Members

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Getting GCP access token from a service account key

Use your service account's key JSON file to get an access token to call Google APIs.

Good for seeing how things work, including the creation of JWT token.

To create a JWT token, you can replace create-jwt-token.sh script with tools like step.

If you just want to get an access token for a service account,

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tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

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Convert sequence of JPEG images to MP4 video

ffmpeg -r 24 -pattern_type glob -i '*.JPG' -i DSC_%04d.JPG -s hd1080 -vcodec libx264 timelapse.mp4

• -r 24 - output frame rate
• -pattern_type glob -i '*.JPG' - all JPG files in the current directory
• -i DSC_%04d.JPG - e.g. DSC_0397.JPG
• -s hd1080 - 1920x1080 resolution

Slower, better quality

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#!/bin/bash

# GUI-related packages
pkgs="
xserver-xorg-video-fbdev
xserver-xorg xinit
gstreamer1.0-x gstreamer1.0-omx gstreamer1.0-plugins-base
gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-alsa
gstreamer1.0-libav
epiphany-browser