Dmitry Petukhov dphov

Useful Spacemacs commands

(wherever it says url.com, use your server's domain or IP)

Login to new server as root, then add a deploy user

sudo useradd --create-home -s /bin/bash deploy
sudo adduser deploy sudo
sudo passwd deploy

And Update the new password

Shutdown your VM and do:

VirtualBox > Settings > Network > Add (you will get vboxnet0)

On a terminal ifconfig will show you new interface vboxnet0

VM's Settings > System > check "Enable I/O APIC." VM's Settings > Network > Adapter 2 > host-only vboxnet0

	`emacs --daemon` to run in the background.
	`emacsclient.emacs24 <filename/dirname>` to open in terminal

	NOTE: "M-m and SPC can be used interchangeably".

	* Undo - `C-/`
	* Redo - `C-?`
	* Change case: 1. Camel Case : `M-c`
	2. Upper Case : `M-u`
	3. Lower Case : `M-l`

	var args = process.argv.slice(2)
	var path = require('path')
	var fs = require('fs')
	var private = false
	var description = ''
	var opener = require('opener')
	var copy = process.platform === 'darwin'
	var open = false
	var help = false
	var stdin = true

	# Don't use FFmpeg for metadata extraction. Use FFprobe.
	# Its output is geared toward parsabilty.
	# Container and stream information in JSON format:
	ffprobe -show_format -print_format json 'Serenity - HD Trailer.mp4'
	ffprobe -show_streams -print_format json 'Serenity - HD Trailer.mp4'

	# Human-readable values:
	ffprobe -show_format -pretty -print_format json 'Serenity - HD Trailer.mp4'

	# Trim video to first 30 seconds, without transcoding.

	See my DASH-IF presentation from October, 2014:
	https://s3.amazonaws.com/misc.meltymedia/dash-if-reveal/index.html#/

	1. encode multiple bitrates with keyframe alignment:
	ffmpeg -i ~/Movies/5D2_Portrait.MOV -s 1280x720 -c:v libx264 -b:v 1450k -bf 2 \
	-g 90 -sc_threshold 0 -c:a aac -strict experimental -b:a 96k -ar 32000 out.mp4

	My input was 30 fps = 3000 ms. If it were 29.97, then a GOP size of 90 frames will yield a base segment
	size of 3003 milliseconds. You can make the segment size some multiple of this, e.g.: 6006, 9009, 12012.

	# Steps to build and install tmux from source.
	# Takes < 25 seconds on EC2 env [even on a low-end config instance].

	VERSION=2.5
	sudo yum -y remove tmux
	sudo yum -y install wget tar libevent-devel ncurses-devel
	wget https://github.com/tmux/tmux/releases/download/${VERSION}/tmux-${VERSION}.tar.gz
	tar xzf tmux-${VERSION}.tar.gz
	rm -f tmux-${VERSION}.tar.gz
	cd tmux-${VERSION}

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	Exploring Recursive Promises In JavaScript
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