luohao-brian

#log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
#                  '$status $body_bytes_sent "$http_referer" '
#                  '"$http_user_agent" "$http_x_forwarded_for"';


import time
import sys
import os
import MySQLdb

luohao-brian

# 创建2个ns, 分别用veth连接在ns1和ns2, 接在ovs网桥br1上

# ns1 & ns2
ip netns add ns1
ip netns add ns2

# tap1 & tap2
ip link add tap1 type veth peer name ovs-tap1
ip link add tap2 type veth peer name ovs-tap2

luohao-brian

apt-cache search # ------(package 搜索包)
apt-cache show #------(package 获取包的相关信息，如说明、大小、版本等)
apt-get install # ------(package 安装包)
apt-get install # -----(package --reinstall 重新安装包)
apt-get -f install # -----(强制安装, "-f = --fix-missing"当是修复安装吧...)
apt-get remove #-----(package 删除包)
apt-get remove --purge # ------(package 删除包，包括删除配置文件等)
apt-get autoremove --purge # ----(package 删除包及其依赖的软件包+配置文件等（只对6.10有效，强烈推荐）)
apt-get update #------更新源
apt-get upgrade #------更新已安装的包

luohao-brian

# create a pv
pvcreate /dev/sdb

# create a data vg
vgcreate data /dev/sdb

# create a thin pool 
lvcreate -L 200G --type thin-pool data/thinpool

# extend thin pool to 300G

luohao-brian

// Netlink 是内核与用户空间进程通信的一种机制，采用与 UDP socket 非常类似的编程风格。（
// 与 UDP 类似，Netlink 通信也有服务器端和客户端。例如，Linux 内核作为服务器端，已经运行在那里。我们则编写 Netlink 客户端，给内核发消息，并获得我们想要的信息。

/*
 *  Display all IPv4 addresses
 */

#include <stdio.h>            //printf, perror
#include <string.h>           //memset, strlen
#include <stdlib.h>           //exit

luohao-brian

<domain type='kvm' id='1'>
    <name>ubuntu-1804-hluo</name>
    <memory unit='KiB'>4194304</memory>
    <currentMemory unit='KiB'>4194304</currentMemory>
    <vcpu>2</vcpu>
    <cpu mode='host-passthrough'/>
    <os>
        <type arch='x86_64'>hvm</type>
        <boot dev='hd'/>
    </os>

luohao-brian

#!/bin/bash

# 创建虚拟交换机:
ovs-vsctl add-br br-int

# 创建TAP设备:
ip tuntap add tap0 mode tap
ip tuntap add tap1 mode tap

# 将设备连接到虚拟交换机:

luohao-brian

# (c) 2007 Chris AtLee <chris@atlee.ca>
# Licensed under the MIT license:
# http://www.opensource.org/licenses/mit-license.php
"""
PAM module for python

Provides an authenticate function that will allow the caller to authenticate
a user against the Pluggable Authentication Modules (PAM) on the system.

Implemented using ctypes, so no compilation is necessary.