Vadim Smirnov cyberbiosecurity

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

"Help, I keep getting a 'Permission Denied (publickey)' error when I push!"

This means, on your local machine, you haven't made any SSH keys. Not to worry. Here's how to fix:

Open git bash (Use the Windows search. To find it, type "git bash") or the Mac Terminal. Pro Tip: You can use any *nix based command prompt (but not the default Windows Command Prompt!)
Type cd ~/.ssh. This will take you to the root directory for Git (Likely C:\Users\[YOUR-USER-NAME]\.ssh\ on Windows)
Within the .ssh folder, there should be these two files: id_rsa and id_rsa.pub. These are the files that tell your computer how to communicate with GitHub, BitBucket, or any other Git based service. Type ls to see a directory listing. If those two files don't show up, proceed to the next step. NOTE: Your SSH keys must be named id_rsa and id_rsa.pub in order for Git, GitHub, and BitBucket to recognize them by default.
To create the SSH keys, type ssh-keygen -t rsa -C "your_email@example.com". Th

Pre-requisite: go to http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html download http://the.earth.li/~sgtatham/putty/latest/x86/putty.exe and http://the.earth.li/~sgtatham/putty/latest/x86/puttygen.exe

Run puttygen and generate the key

Click 'Generate' move the mouse around as instructed and wait

Setup Persistent Aliases & Macros in Windows Command Prompt (cmd.exe) using DOSKey

Saved from Archive.org, Date: May 14, 2010 Author: Jesse Webb

http://web.archive.org/web/20140330024520/http://devblog.point2.com/2010/05/14/setup-persistent-aliases-macros-in-windows-command-prompt-cmd-exe-using-doskey/

Our development machines here at Point2 are not standardized; we have a mixture of Windows XP, 7, and Mac OSX/Unix computers. I find myself constantly switching back and forth between command prompt interfaces when pair programming. As a result, I catch myself using “ls” to list a directories contents regardless of what system I am on. I am currently using a Windows XP machine for my developer box and I wanted to setup an alias to the “ls” command to actually perform a “dir”. Here is how I accomplished it…

There is a command available in a Window’s shell that let’s you “alias” command to whatever you please: DOSKey. It allows you to create “macros” to execute one or more other commands with a custom nam

SSH Server with the Python Twisted Library

Installing the library

Assuming you have Python installed on your system:

pip install twisted
pip install pyOpenSSL
pip install service_identity

	#!/usr/bin/env python3
	# -- mode: python --

	# This program is free software. It comes without any warranty, to the extent
	# permitted by applicable law. You can redistribute it and/or modify it under
	# the terms of the Do What The Fuck You Want To Public License, Version 2, as
	# published by Sam Hocevar. See http://sam.zoy.org/wtfpl/COPYING for more
	# details.

	# Some useful resources:

	#!/usr/bin/env python
	# -- coding: utf-8 --

	import sys
	import math

	from PyQt4 import QtGui, QtCore


	def binomial(i, n):

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	# Execute select in pgAdmin
	# write result to file
	"""
	select encode(my_bin_field,'base64')
	from my_schema.my_table
	where id=123;
	"""
	# Remove column name from generated file

	import base64

	Do
	Msgbox "This is a simple infinite loop"
	Loop