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Alejandro Schwoykoski chaicko

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chaicko / tmux_cheatsheet.markdown
Created March 23, 2016 20:20 — forked from henrik/tmux_cheatsheet.markdown
tmux cheatsheet

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

@chaicko
chaicko / tmux-cheatsheet.markdown
Created March 4, 2016 12:41 — forked from MohamedAlaa/tmux-cheatsheet.markdown
tmux shortcuts & cheatsheet

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname
@chaicko
chaicko / beagle-quemu-linaro.sh
Created February 16, 2016 14:46
#!/usr/bin/env bash
cd $HOME
git clone git://git.linaro.org/qemu/qemu-linaro.git qemu-linaro
cd qemu-linaro
sudo apt-get build-dep qemu # to install the build dependencies of qemu
./configure --target-list=arm-softmmu --prefix=$HOME/qemu
make
make install
# Now you have a QEMU in $HOME/qemu/bin/qemu-system-arm and can test a BeagleBoard-xM build on qemu by running:
@chaicko
chaicko / mmap_example.c
Created September 2, 2015 13:19
An example of how to use mmap (from http://www.linuxquestions.org/questions/programming-9/mmap-tutorial-c-c-511265/)
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#define FILEPATH "/tmp/mmapped.bin"
#define NUMINTS (1000)
@chaicko
chaicko / gist:c659fb8b50985880e1eb
Last active August 29, 2015 14:27
Emulating ARM on Debian/Ubuntu

You might want to read this to get an introduction to armel vs armhf.

If the below is too much, you can try Ubuntu-ARMv7-Qemu but note it contains non-free blobs.

Running ARM programs under linux (without starting QEMU VM!)

First, cross-compile user programs with GCC-ARM toolchain. Then install qemu-arm-static so that you can run ARM executables directly on linux

@chaicko
chaicko / gist:cacc86ca84c786f15514
Last active June 11, 2022 15:11
Hex To/From String conversion Python Recipe taken from http://code.activestate.com/recipes/510399-byte-to-hex-and-hex-to-byte-string-conversion/
"""
HexByteConversion
Convert a byte string to it's hex representation for output or visa versa.
ByteToHex converts byte string "\xFF\xFE\x00\x01" to the string "FF FE 00 01"
HexToByte converts string "FF FE 00 01" to the byte string "\xFF\xFE\x00\x01"
"""
#-------------------------------------------------------------------------------
@chaicko
chaicko / gist:1d3fc1f9b508feadfac3
Last active August 29, 2015 14:23 — forked from azul/gist:9209005

Secure Remote Password explained for mere mortals

Discrete Logarithm

Most SRP calculations happen in the group of integers modulo a large number N. Basically whenever a number x grow beyond N you use x mod N instead.

@chaicko
chaicko / custom-error.js
Last active August 29, 2015 14:22 — forked from justmoon/custom-error.js
'use strict';
module.exports = function CustomError(message, extra) {
Error.captureStackTrace(this, this.constructor);
this.name = this.constructor.name;
this.message = message;
this.extra = extra;
};
require('util').inherits(module.exports, Error);
@chaicko
chaicko / mocha-guide-to-testing.js
Last active August 29, 2015 14:22 — forked from samwize/mocha-guide-to-testing.js
// # Mocha Guide to Testing
// Objective is to explain describe(), it(), and before()/etc hooks
// 1. `describe()` is merely for grouping, which you can nest as deep
// 2. `it()` is a test case
// 3. `before()`, `beforeEach()`, `after()`, `afterEach()` are hooks to run
// before/after first/each it() or describe().
//
// Which means, `before()` is run before first it()/describe()
@chaicko
chaicko / node-and-npm-in-30-seconds.sh
Last active August 29, 2015 14:15 — forked from isaacs/node-and-npm-in-30-seconds.sh
echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
. ~/.bashrc
mkdir ~/local
mkdir ~/node-latest-install
cd ~/node-latest-install
curl http://nodejs.org/dist/node-latest.tar.gz | tar xz --strip-components=1
./configure --prefix=~/local
make install # ok, fine, this step probably takes more than 30 seconds...
curl https://www.npmjs.org/install.sh | sh