s7ephen

#!/usr/bin/ruby
# This code is to demonstrate these very important things to remember about Ruby:
#
# 1. Classes are also Objects in Ruby.
# 2. Every Object in Ruby has its own Singleton Class (or "Meta Class" or "Eigen
#   Class"
# 3. In other languages you may be familiar with the idea that each Object
#   Instance is unique, but in Ruby, each Object Instance has its own unique
#   Class definition, unique to JUST THAT instance. This is called the Object's
#   singleton class.

bradoaks

#!/bin/bash

# As the "bufferbloat" folks have recently re-discovered and/or more widely
# publicized, congestion avoidance algorithms (such as those found in TCP) do
# a great job of allowing network endpoints to negotiate transfer rates that
# maximize a link's bandwidth usage without unduly penalizing any particular
# stream. This allows bulk transfer streams to use the maximum available
# bandwidth without affecting the latency of non-bulk (e.g. interactive)
# streams.

tobert

#!/bin/bash

COUNT=10
BRIDGE="br1"
FORMAT="lxc%d"
PARENT=$(hostname --fqdn)
LXC_ROOT=/srv/virt/lxc
OS_ROOT=/srv/virt/lxc/base/root

for num in $(seq 1 $COUNT)

rtomayko

#!/usr/bin/env ruby
#/ Usage: <progname> [options]...
#/ How does this script make my life easier?
# ** Tip: use #/ lines to define the --help usage message.
$stderr.sync = true
require 'optparse'

# default options
flag    = false
option  = "default value"

samqiu

# 在本地服务器建立 rubygems.org 的镜像缓存，以提高 gem 的安装速度
# 此配置设置缓存过期为1天，也就是说，新上的 gem 无法马上安装
# 做这个起什么作用？
# rubygems 的很多资源文件是存放到 Amazon S3 上面的，由于 GFW 对某些 S3 服务器又连接重置或丢包，导致 gem 安装异常缓慢或有时候根本无法连接安装。
# 而通过这种跳板的方式可以很好的解决这个问题，当然前提是 Nginx反向代理 服务器需要在国外

proxy_cache_path  /var/cache/rubygems  levels=1:2    keys_zone=RUBYGEMS:10m
                                       inactive=24h  max_size=1g;
server {
  listen 80;

tobert

#!/bin/bash
# Linux RAID5 tuning
# Al Tobey 2011-09-19 <al@ooyala.com>

for sysent in /sys/block/sd*
do
    drive=$(basename $sysent)
    sector_size=$(blockdev --getss /dev/$drive)

dexterbt1

#!/bin/bash
# vim: set ts=4 sw=4 et nu
set -e
usage="Usage: $0 <name>"
name=$1
if [ -z "$name" ]; then
	echo $usage
	exit 1;
fi

skihero

Was trying to create an rpm from the installed haproxy binaries. 
Ran into this problem. 

Turns out we need to do a prelink -u haproxy on the binary that we're packaging. 
The binary had come from a different machine than the place where we're building it. 

jkstill

Decoding the data in /proc/net/tcp:

Linux 5.x  /proc/net/tcp
Linux 6.x  /proc/PID/net/tcp

Given a socket:

$ ls -l  /proc/24784/fd/11
lrwx------ 1 jkstill dba 64 Dec  4 16:22 /proc/24784/fd/11 -> socket:[15907701]

rcoup

#!/bin/bash
set -e

# Usage:
#   rsync_parallel.sh [--parallel=N] [rsync args...]
# 
# Options:
#   --parallel=N	Use N parallel processes for transfer. Defaults to 10.
#
# Notes: