Andrei Kostiuchenko avkosme

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

I have some early benchmark results for our work on a high performance NATS server in Go.

Quick Summary:
We can process ~2M msgs/sec through the system, and the ingress and egress are fairly well balanced.

The basics of the architecture are intelligent buffering and IO calls, fast hashing algorithms and subject distributor/routing, and a zero-allocation hand-written protocol parser.

In addition, I used quite a bit of inlining to avoid function overhead, no use of defer, and little to no object allocation within the fast path. I will share more details and the code at a future date.

Installing SSHPASS

SSHPass is a tiny utility, which allows you to provide the ssh password without using the prompt. This will very helpful for scripting. SSHPass is not good to use in multi-user environment. If you use SSHPass on your development machine, it don't do anything evil.

Installing on Ubuntu

apt-get install sshpass

Installing on OS X

Working with ansible-vault

I've been using a lot of Ansible lately and while almost everything has been great, finding a clean way to implement ansible-vault wasn't immediately apparent.

What I decided on was the following: put your secret information into a vars file, reference that vars file from your task, and encrypt the whole vars file using ansible-vault encrypt.

Let's use an example: You're writing an Ansible role and want to encrypt the spoiler for the movie Aliens.

	========================================== ==========================================
	TMUX COMMAND WINDOW (TAB)
	========================================== ==========================================

	List tmux ls List ^b w
	New new -s <session> Create ^b c
	Attach att -t <session> Rename ^b , <name>
	Rename rename-session -t <old> <new> Last ^b l (lower-L)
	Kill kill-session -t <session> Close ^b &

	#!/usr/bin/env python

	import os
	import xml.parsers.expat
	from xml.sax.saxutils import escape
	from optparse import OptionParser
	from math import log10


	# How much data we process at a time

	# mongodb.conf

	# Where to store the data.

	# Note: if you run mongodb as a non-root user (recommended) you may
	# need to create and set permissions for this directory manually,
	# e.g., if the parent directory isn't mutable by the mongodb user.
	dbpath=/var/lib/mongodb

	#where to log

	MIT License

	Copyright (c) <year> <copyright holders>

	Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

	The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE S

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048

	# добавить в (add in file) /etc/sudoers
	Defaults visiblepw