physacco

Erlang references are unique indentifiers. They are commonly used to
identify timers, rpc calls, etc.

    make_ref() -> ref()

    Returns an almost unique reference.

    The returned reference will re-occur after approximately 2^82 calls;

physacco

import pdb
import cgi
import dis
import time
import struct
import marshal

def dump_code_object(code, ident=0):
    print '%s<code_object>' % (' '*ident,)
    ident += 2

physacco

/* tcp_keepalive.c
 *
 * References:
 * http://tldp.org/HOWTO/TCP-Keepalive-HOWTO/usingkeepalive.html
 * http://www.tldp.org/HOWTO/html_single/TCP-Keepalive-HOWTO/
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

physacco

把一个git仓库的origin搬到另一台服务器上

1. 在旧服务器上删除这个仓库

   rm -r /home/$USER/repo/$REPO

2. 在新服务器上创建一个同名的仓库

   cd /home/$USER/repo git init --bare $REPO

physacco

#!/bin/bash

set -e

PREFIX="$HOME/local/ruby/1.9.3"

RUBY_DIST_URL="ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p392.tar.gz"
RUBY_DIST_PKG=`basename $RUBY_DIST_URL`
RUBY_DIST_DIR=`basename $RUBY_DIST_PKG .tar.gz`

physacco

#!/bin/bash

script_dir()
{
  local SCRIPT_PATH=${BASH_SOURCE[0]}
  while [ -L "${SCRIPT_PATH}" ]; do
    SCRIPT_PATH=`readlink "$SCRIPT_PATH"`
  done

  local SCRIPT_DIR=`dirname "${SCRIPT_PATH}"`

physacco

def parse_config_stream(str_or_file):
    _myglobals, mylocals = {}, {}
    exec str_or_file in _myglobals, mylocals
    return mylocals

def parse_config_file(filename):
    _myglobals, mylocals = {}, {}
    with open(filename) as f:
        exec f in _myglobals, mylocals

physacco

$ gem sources
*** CURRENT SOURCES ***

http://rubygems.org/
http://gems.github.com/

$ gem sources --remove http://rubygems.org/
http://rubygems.org/ removed from sources

$ gem sources --add http://ruby.taobao.org/

physacco

# ejabberdctl
Usage: ejabberdctl [--node nodename] [--auth user host password] command [options]

Available commands in this ejabberd node:
  backup file
  connected_users
  connected_users_number
  delete_expired_messages
  delete_old_messages days
  dump file

physacco

#!/bin/sh

# Unset GIT_DIR or you will get a `fatal: Not a git repository: '.'` error.
# Refer to: http://stackoverflow.com/questions/10507942/git-checkout-in-post-receive-hook-not-a-git-repository
unset GIT_DIR

cd /home/www/mysite || exit
git pull
nanoc compile