ShawnHuang

#HOW-TO: Virtualize Raspian with Qemu

0.Workspace

mkdir -p ~/workspace/raspdev
cd ~/workspace/raspdev

1.Install Qemu

ShawnHuang

imap jj <esc>

ShawnHuang

https://superuser.com/questions/1027957/zsh-change-prompt-just-before-command-is-run
https://gist.github.com/PaulCapestany/4736311#file-oh-my-zsh-prompt

ShawnHuang

$ \curl -sSL https://get.rvm.io | bash
$ source /home/<user>/.rvm/scripts/rvm
$ rvm -v
$ rvm install ruby
$ ruby -v
$ sudo apt-get install rubygems
$ gem update
$ sudo apt-get install ruby-dev zlib1g-dev liblzma-dev build-essential patch

ShawnHuang

    print("─────────────────────────▄▀▄")
    print("─────────────────────────█─█")
    print("─────────────────────────█─█")
    print("─────────────────────────█─█")
    print("─────────────────────────█─█")
    print("─────────────────────────█─█")
    print("─────────────────────────█─▀█▀█▄")
    print("─────────────────────────█──█──█")
    print("─────────────────────────█▄▄█──▀█")
    print("────────────────────────▄█──▄█▄─▀█")

ShawnHuang

#!/bin/ksh

typeset port=$((RANDOM % 60000))
while ((port < 30000)); do
    port=$((RANDOM % 60000))
done

typeset pipe=`mktemp -u`
mkfifo $pipe
trap "rm -f $pipe" INT

ShawnHuang

function string.fromhex(str)
    return (str:gsub('..', function (cc)
        return string.char(tonumber(cc, 16))
    end))
end

function string.tohex(str)
    return (str:gsub('.', function (c)
        return string.format('%02X', string.byte(c))
    end))

ShawnHuang

http://stackoverflow.com/questions/2016404/git-status-shows-modifications-git-checkout-file-doesnt-remove-them

ShawnHuang

$ find /etc/ -name passwd
find: /etc//cups/certs: Permission denied ->stderr(2)
/etc//pam.d/passwd ->stdout(1)
/etc//passwd

#Redirect stdout

ShawnHuang

/**
 * Definition for singly-linked list.
 * struct ListNode {
 *     int val;
 *     struct ListNode *next;
 * };
 */
 
struct TNode{
    struct ListNode *node;