Linux kernel, wifi hack, security & Golang

这里有列了两个方法：

1. Ping 实现

@ECHO OFF

rem –#——————————————————————

rem –# Script : sleep.BAT

rem –# Tested : Microsoft Windos XP [Version 5.1.2600]

rem –# Purpose : Sleep for number of seconds

rem –# Every 2 pings to localhost takes about 1 second

rem –#

rem –# Usage : sleep.BAT {# of seconds to sleep}

rem –#——————————————————————

ECHO %TIME%

FOR /l %%a IN (%1,-1,1) do (ECHO 1 >NULL %%as&ping -n 2 -w 1 127.0.0.1>NUL)

ECHO %TIME%

2. VBScript 实现

@echo off

echo Wscript.Sleep WScript.Arguments(0) >%tmp%\delay.vbs

cscript //b //nologo %tmp%\delay.vbs 5000

del %tmp%\delay.vbs > nul

当然你也可以用C自己写个。

参考: http://it.toolbox.com/blogs/database-solutions/sleeping-in-a-bat-script-22111

本文来自: Solidot.
Google宣布 推出免费的DNS解析服务Google Public DNS。

–
Bian Jiang
Blog: http://www.wifihack.net/

1. linux/unix
OpenSSH 支持SOCKS4和SOCKS5, 我们可以通过参数 -D 在本地创建一个代理端口. 例如:

ssh -D  12345 myuser@remote_ssh_server

我们已经在本地创建的一个SOCKS的端口12345, 现在你可以通过修改你的IE, Firefox 中的连接方式来用代理上网。比如:

IP 改为 127.0.0.1
端口: 12345
方式改为: SOCKS5

这样我们就可以继续访问 youtube 了。
2. 如果是windows 可以使用 putty的后台命令行程序plink(http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html)

plink -N username@remote.ssh.server -D 127.0.0.1:7070

其中 -N 表示不需要shell
username@remote.ssh.server 换成你ssh帐户名和主机域名或者地址
或者替换成 -load sessionname 也可以，用dreamhost上的帐号试了一下，真的很快
如果你用的是 Firefox 可以用SwitchProxy(https://addons.mozilla.org/en-US/firefox/addon/125), 非常方便的切换。
ssh -D 参数的描述:

-D [bind_address:]port
Specifies a local “dynamic” application-level port forwarding.  This works by allocating a
socket to listen to port on the local side, optionally bound to the specified bind_address.
Whenever a connection is made to this port, the connection is forwarded over the secure chan-
nel, and the application protocol is then used to determine where to connect to from the
remote machine.  Currently the SOCKS4 and SOCKS5 protocols are supported, and ssh will act as
a SOCKS server.  Only root can forward privileged ports.  Dynamic port forwardings can also
be specified in the configuration file.

IPv6 addresses can be specified with an alternative syntax: [bind_address/]port or by enclos-
ing the address in square brackets.  Only the superuser can forward privileged ports.  By
default, the local port is bound in accordance with the GatewayPorts setting.  However, an
explicit bind_address may be used to bind the connection to a specific address.  The
bind_address of “localhost” indicates that the listening port be bound for local use only,
while an empty address or ‘*’ indicates that the port should be available from all inter-
faces.

3.摘自chedong.com

ssh -qTfnN -D 7070 remotehost.

All the added options are for a ssh session that’s used for tunneling.

-q :- be very quite, we are acting only as a tunnel.
-T :- Do not allocate a pseudo tty, we are only acting a tunnel.
-f :- move the ssh process to background, as we don’t want to interact with this ssh session directly.
-N :- Do not execute remote command.
-n :- redirect standard input to /dev/null.

Links:
1. Use ssh create http proxy (http://www.linuxjournal.com/content/use-ssh-create-http-proxy)
2. http://www.chedong.com/blog/archives/001246.html
3. Putty (http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html)
Bian Jiang
http://www.wifihack.net

–EOF–

在2008年的最后一天，无数的Zune 30 用户忽然发现自己的MP3无法正常播放，而专家给出的解决方法是:

“let the Zune run out of battery and the clock bug will essentially fix itself”

(让电池耗尽或这一天不要用Zune，到第二天就会自己好起来)，但是这个Bug会四年后的今天再现。

在国外的一个论坛上看到一个帖子说Bug产生的原因, 当时闰年的时候天数是366天，下面的是Zune的 时钟驱动:

year = ORIGINYEAR; /* = 1980 */

while (days > 365)
{
    if (IsLeapYear(year))
    {
        if (days > 366)  // 当在闰年的时候，days = 366 是出现死循环
        {
            days -= 366;
            year += 1;
        }
    }
    else
    {
        days -= 365;
        year += 1;
    }
}

我们会发现当 days = 366 天的时候，while 就会进入死循环，直到24小时过后，才能正常工作。

当然还有一种修改驱动的方法:

year = ORIGINYEAR; /* = 1980 */

while (days > 365)
{
    if (IsLeapYear(year))
    {
        if (days > 366)
        {
            days -= 366;
            year += 1;
        }
        else  // 可以修复Bug
        {
            break;
        }
    }
    else
    {
        days -= 365;
        year += 1;
    }
}

参考：

1.Cause of Zune 30 leapyear problem ISOLATED!

http://www.zuneboards.com/forums/zune-news/38143-cause-zune-30-leapyear-problem-isolated.html

2.Zune 时钟驱动

http://pastie.org/349916

3.The Day the Zunes Stood Still: Update

http://www.crunchgear.com/2008/12/31/the-day-the-zunes-stood-still-update/

–EOF–