<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[Programer From Scrach]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/BlueSy2008</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; BlueSy2008]]></copyright><item><title><![CDATA[内核模块签名 secure boot]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/79372962</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/79372962</guid><author>BlueSy2008</author><pubDate>Mon, 26 Feb 2018 08:00:08 +0800</pubDate><description><![CDATA[转自：http://blog.chinaunix.net/uid-27717694-id-3999307.html

sign-file在kernel源代码目录找

一、前言
linux内核从3.7 开始加入模块签名检查机制，如果内核选项CONFIG_MODULE_SIG和CONFIG_MODULE_SIG_FORCE打开的话，当加载模块时内核会检查模块的签名，如果签名不存在或者签名内容]]></description><category></category></item><item><title><![CDATA[VFIO简介]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/79097828</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/79097828</guid><author>BlueSy2008</author><pubDate>Thu, 18 Jan 2018 18:02:23 +0800</pubDate><description><![CDATA[PCI 设备绑定驱动与解绑定
(u'/sys/bus/pci/drivers/e1000/unbind', 'dev_id', '0000:00:08.0') 从驱动解除绑定

('/sys/bus/pci/devices/0000:00:08.0/driver_override', 'vfio-pci') 设备绑定驱动
('/sys/bus/pci/drivers/vfio-pci/bi]]></description><category></category></item><item><title><![CDATA[tcpdump减少drop packets by kernel]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/70020326</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/70020326</guid><author>BlueSy2008</author><pubDate>Mon, 10 Apr 2017 19:57:09 +0800</pubDate><description><![CDATA[tcpdump -i eth1  -nn -n -s0 -B40960 udp port 53 and host 10.183.223.142]]></description><category></category></item><item><title><![CDATA[DNS record limititions]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/53763201</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/53763201</guid><author>BlueSy2008</author><pubDate>Tue, 20 Dec 2016 15:08:18 +0800</pubDate><description><![CDATA[在RR值（主机头）相同的情况下，域名解析类型冲突限制规则如下：










NS



CNAME



A



URL



MX



TXT



AAAA



SRV





NS



可重复



X



X



X



X


]]></description><category></category></item><item><title><![CDATA[SOCKET REUSE_ADDR RESUE_PORT FW FROM stackoverflow]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/53116376</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/53116376</guid><author>BlueSy2008</author><pubDate>Thu, 10 Nov 2016 15:43:05 +0800</pubDate><description><![CDATA[Welcome to the wonderful world of portability... or rather the lack of it. Before we start analyzing these two options in detail and take a deeper look how different operating systems handle them, it ]]></description><category></category></item><item><title><![CDATA[MySQL  query record]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/53011857</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/53011857</guid><author>BlueSy2008</author><pubDate>Wed, 02 Nov 2016 20:36:54 +0800</pubDate><description><![CDATA[delete from tb_view_history h inner join tb_domain d where d.id=h.domain_id and  d.group_id=$GROUP_ID

delete h  from tb_view_history h inner join tb_domain d where d.id=h.domain_id and  d.group_id=]]></description><category></category></item><item><title><![CDATA[Linux Tune Network Stack (Buffers Size) To Increase Networking Performance]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/52915692</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/52915692</guid><author>BlueSy2008</author><pubDate>Mon, 24 Oct 2016 21:05:10 +0800</pubDate><description><![CDATA[Linux Tune Network Stack (Buffers Size) To Increase Networking Performance

by VIVEK GITE on MAY
 20, 2009 last updated JULY 8, 2009
in CENTOS, DEBIAN
 / UBUNTU, FAQ, LINUX, NETWORKING, REDHAT
 ]]></description><category></category></item><item><title><![CDATA[How To: Network / TCP / UDP Tuning]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/52915644</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/52915644</guid><author>BlueSy2008</author><pubDate>Mon, 24 Oct 2016 21:01:19 +0800</pubDate><description><![CDATA[How To: Network / TCP / UDP Tuning
This is a very basic step by step description of how to improve the performance networking (TCP & UDP) on Linux 2.4+ for high-bandwidth applications. These settings]]></description><category></category></item><item><title><![CDATA[git常用汇总]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/52819292</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/52819292</guid><author>BlueSy2008</author><pubDate>Fri, 14 Oct 2016 22:00:54 +0800</pubDate><description><![CDATA[转载 
常用 Git 命令清单这一篇就够啦！

下面是我整理的常用 Git 命令清单。几个专用名词的译名如下。






Workspace：工作区


Index / Stage：暂存区


Repository：仓库区（或本地仓库）


Remote：远程仓库





一、新建代码库





# 在当前目录新建一个Git代码库]]></description><category></category></item><item><title><![CDATA[The best approach for sharding MySQL tables]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/52693519</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/52693519</guid><author>BlueSy2008</author><pubDate>Wed, 28 Sep 2016 20:24:32 +0800</pubDate><description><![CDATA[The best approach for sharding MySQL tables to not do it unless it is totally unavoidable to do it.

When you are writing an application, you usually want to do so in a way that maximizes velocity, ]]></description><category></category></item><item><title><![CDATA[Understanding Defer, Panic and Recover]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/52555699</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/52555699</guid><author>BlueSy2008</author><pubDate>Fri, 16 Sep 2016 15:01:33 +0800</pubDate><description><![CDATA[I am building my TraceLog package and it is really important that the package logs any internal exceptions and prevents panics from shutting down the application. The TraceLog package must never be re]]></description><category></category></item><item><title><![CDATA[Goroutines vs Threads]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/52555224</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/52555224</guid><author>BlueSy2008</author><pubDate>Fri, 16 Sep 2016 13:46:15 +0800</pubDate><description><![CDATA[Here are some of the advantages of Goroutines over threads:


You can run more goroutines on a typical system than you can threads.
Goroutines have growable segmented stacks.
Goroutines have a fa]]></description><category></category></item><item><title><![CDATA[Linux vmstat命令实战详解]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/52330742</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/52330742</guid><author>BlueSy2008</author><pubDate>Fri, 26 Aug 2016 18:09:06 +0800</pubDate><description><![CDATA[Linux vmstat命令实战详解



vmstat命令是最常见的Linux/Unix监控工具，可以展现给定时间间隔的服务器的状态值,包括服务器的CPU使用率，内存使用，虚拟内存交换情况,IO读写情况。这个命令是我查看Linux/Unix最喜爱的命令，一个是Linux/Unix都支持，二是相比top，我可以看到整个机器的CPU,内存,IO的使用情况，而不是单单看到各个进程的CPU使用率]]></description><category></category></item><item><title><![CDATA[Mysql 添加Index]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/51852592</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/51852592</guid><author>BlueSy2008</author><pubDate>Thu, 07 Jul 2016 16:52:51 +0800</pubDate><description><![CDATA[ALTER TABLE tb_domain ADD INDEX groupid_name_index (group_id, name);
ALTER TABLE tb_view_history ADD INDEX domainid_view_code (domain_id, view_code);]]></description><category></category></item><item><title><![CDATA[Mysql 支持中文集合]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/51842170</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/51842170</guid><author>BlueSy2008</author><pubDate>Wed, 06 Jul 2016 20:39:40 +0800</pubDate><description><![CDATA[首先，MySQL的字符集问题主要是两个概念，一个是Character Sets，一个是Collations，前者是字符内容
及编码，后者是对前者进行比较操作的一些规则。这两个参数集可以在数据库实例、单个数据库、表、列等四个级
别指定。

　　对于使用者来说，一般推荐使用utf8编码来存储数据。而要解决乱码问题，不单单是MySQL数据的存储问题，还
和用户的程序文件的编码方式、用户程序和M]]></description><category></category></item><item><title><![CDATA[批量启动虚拟机 开启vhost]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/51356432</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/51356432</guid><author>BlueSy2008</author><pubDate>Mon, 09 May 2016 21:34:50 +0800</pubDate><description><![CDATA[MAC_F=26
MAC_MID=25:d4:92:02
MAC_L=01


IP_PRE=192.168.101
IP_L=21


MAX=$1
PRE=$2


for ((i=1; i
do
    if [ $i -ge 10 ] ; then
        exit 1
    fi
    ##
    #let "j=$i+5"
    ]]></description><category></category></item><item><title><![CDATA[Use libvirt to conmunicate with qemu]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/51039335</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/51039335</guid><author>BlueSy2008</author><pubDate>Fri, 01 Apr 2016 20:26:30 +0800</pubDate><description><![CDATA[virsh qemu-monitor-command --hmp instance-01
 'info'


virsh qemu-monitor-command

instance-01--pretty '{"execute":"query-commands"}']]></description><category></category></item><item><title><![CDATA[Go and HTTPS]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/51029544</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/51029544</guid><author>BlueSy2008</author><pubDate>Thu, 31 Mar 2016 19:48:42 +0800</pubDate><description><![CDATA[转自：http://tonybai.com/2015/04/30/go-and-https/
近期在构思一个产品，考虑到安全性的原因，可能需要使用到HTTPS协议以及双向数字证书校验。之前只是粗浅接触过HTTP（使用Golang开
 发微信系列）。对HTTPS的了解则始于那次自行搭建ngrok服务，在那个过程中照猫画虎地为服务端生成了一些私钥和证书，虽然结果是好 的：ngrok服务成功搭建起来]]></description><category></category></item><item><title><![CDATA[TCP优化]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/51025177</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/51025177</guid><author>BlueSy2008</author><pubDate>Thu, 31 Mar 2016 12:18:07 +0800</pubDate><description><![CDATA[作者: 老王  发布时间: 2014-01-08 22:43  阅读: 9782 次  推荐: 18   原文链接   [收藏]  



　　很多人常常对TCP优化有一种雾里看花的感觉，实际上只要理解了TCP的运行方式就能掀开它的神秘面纱。Ilya
 Grigorik 在「High Performance Browser Networking」中做了很多细致的描述，让人读起来醍醐灌顶，]]></description><category></category></item><item><title><![CDATA[解决qcow2高版本兼容问题]]></title><link>https://blog.youkuaiyun.com/BlueSy2008/article/details/49079125</link><guid>https://blog.youkuaiyun.com/BlueSy2008/article/details/49079125</guid><author>BlueSy2008</author><pubDate>Mon, 12 Oct 2015 20:24:24 +0800</pubDate><description><![CDATA['image' uses a qcow2 feature which is not supported by this qemu version: QCOW version 3

1.1 为新的QCOW V3 centos7/Fedora20 qemu-img支持格式，通过如下命令转化成低版本支持的QCOW2
qemu-img amend -f qcow2 -o compat=0.10 te]]></description><category></category></item></channel></rss>