netcat和schtasks来定期检查本机上的端口是不是开着，没开着就重启。netcat的Windows版本见文末链接。test-7771.bat。
@echo off
nc -z 10.17.17.177 7771
if ERRORLEVEL 1 shutdown -r -t 180
exit %RANDOM%
test-7771.bat一次。
schtasks /sc MINIUTE /mo 10 /tn test-7771 /tr C:\test-7771.bat
netsh interface portproxy在Windows XP上边不起作用，一直报"connection refused"。因为缺少IPV6MON.DLL。需要使用ipv6 install来安装IPv6协议。如果还是不行，记得使用reset来重置之前所设置的项。具体请见文末链接。ASSOC，FTYPE
F:\>assoc .py
.py=Python.File
F:\>ftype Python.File
Python.File="C:\Python32\python.exe" "%1" %*
F:\>ftype Python.File="C:\Python27\python.exe" "%1" %*
Python.File="C:\Python27\python.exe" "%1" %*
F:\>ftype Python.File
Python.File="C:\Python27\python.exe" "%1" %*
ffmpeg -i "The.Big.Bang.Theory.1x17.The.Tangerine.F actor.720p.HDTV.x264-DIMENSION.[tvu.org.ru].mkv" -ss 00:11:02.450 -t 00:00:01.70 0 nearly_scared_me_to_death.mp3
| -i： | 指定输入文件（input） |
| -ss： | 选择起始时间点（seek start point），格式HH:MM:SS[.xxx] |
| -t： | 指定时长（duration） |
enum :: Int -> [[Char]] enum 1 = ["A", "T", "C", "G"] enum n = [ x:enum_decr | x <- "ATCG", enum_decr <- enum (n - 1) ] enum' :: [Char] -> Int -> [[Char]] enum' init_value 1 = [ [x] | x <- init_value ] enum' init_value n = [ x:enum_prev | x <- init_value, enum_prev <- enum' init_value (n - 1) ] enum'' :: [a] -> Int -> [[a]] enum'' init_value 1 = [ [x] | x <- init_value ] enum'' init_value n = [ x:enum_prev | x <- init_value, enum_prev <- enum'' init_value (n - 1) ]
在文章《Python Types and Objects》分析的初始阶段，有如下图。所以：>>> isinstance(type, type) True >>> isinstance(type, object) True >>> isinstance(object, object) True >>> isinstance(object, type) True >>>
/etc/NetworkManager/dispatchter.d/下新添加一个文件，命名为99dnsgogoc。当NetworkManager探知新的网络事件时，就会按文件名的字典序依次执行目录里的那些脚本，见man NetworkManager。往99dnsgogoc里添加如下内容：#!/bin/sh -e GOGOC_DNSSERVER="nameserver 2001:5c0:1000:11::2" # Insert disco.gogo6.com's AAAA record to /etc/resolv.conf's first line sed -i "1i$GOGOC_DNSSERVER" /etc/resolv.conf这样就会优先使用gogoc具有IPv6解析功能的DNS服务器，比如BlogSpot和Youtube就可以很方便的访问了。
import ctypes
import _winreg
# See http://msdn.microsoft.com/en-us/library/aa385328(v=vs.85).aspx
#: Causes the proxy data to be reread from the registry for a handle. No buffer is required. This option can be used on the HINTERNET handle returned by InternetOpen. It is used by InternetSetOption.
INTERNET_OPTION_REFRESH = 37
#: Notifies the system that the registry settings have been changed so that it verifies the settings on the next call to InternetConnect. This is used by InternetSetOption.
INTERNET_OPTION_SETTINGS_CHANGED = 39
# setup function
Wininet = ctypes.windll.Wininet
InternetSetOption = Wininet.InternetSetOptionW
HKEY_CURRENT_USER = _winreg.HKEY_CURRENT_USER
SUB_KEY_PATH = r'Software\Microsoft\Windows\CurrentVersion\Internet Settings'
def main():
hkey = _winreg.OpenKey(HKEY_CURRENT_USER, SUB_KEY_PATH, 0, _winreg.KEY_READ | _winreg.KEY_WRITE)
(ProxyEnabled, _) = _winreg.QueryValueEx(hkey, 'ProxyEnable')
_winreg.SetValueEx(hkey, 'ProxyEnable', 0, _winreg.REG_DWORD, not ProxyEnabled)
print 'enabled' if not ProxyEnabled else 'disabled'
InternetSetOption(0, INTERNET_OPTION_REFRESH, 0, 0)
InternetSetOption(0, INTERNET_OPTION_SETTINGS_CHANGED, 0, 0)
if __name__ == '__main__':
main()HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable的值，然后Toggle一下，0则设为1，1则设为0。然后通过InternetSetOption函数告知系统设置已变。__repr__, __unicode__, __str__, __len__, __gt__, __lt__, __eq__, __hash__, __get__, __set__, __getattr__, __setattr__, __del__, __iter__, __next__, __getitem__, __dict__, __blah__
>>> def __print_hello():
... print 'hello'
...
>>> class Class(object):
... def pack(self):
... __print_hello()
...
>>> inst = Class()
>>> inst.pack()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 3, in pack
NameError: global name '_Class__print_hello' is not defined
>>>"This file came from another computer and might be blocked to help protect this computer"IE，Google Chrome，Firefox都支持这个功能。这个属性不会随着位置的移动和拷贝而丢失。"Unblock"之后的文件与原文件的各种哈希校验也一致。How Windows managed to track such kind of identity?
echo Hello, Streams >test:stream
more <test:stream
F:\>streams breathe-life.jpg
Streams v1.56 - Enumerate alternate NTFS data streams
Copyright (C) 1999-2007 Mark Russinovich
Sysinternals - www.sysinternals.com
F:\breathe-life.jpg:
:Zone.Identifier:$DATA 24
F:\>more <breathe-life.jpg:Zone.Identifier
[ZoneTransfer]
ZoneId=3
F:\>set /pvar=<nul >breathe-life.jpg:Zone.Identifier#include <stdio.h>
int main()
{
FILE *fout;
fout = fopen("test:stream", "wb");
fprintf(fout, "Hello Stream Through Pure C.\n");
fclose(fout);
return 0;
}userid=username4. "Not starting gogoc - no server key"，或者plain方式可以成功，passdss-3des-1却不可以。参见文档/usr/share/doc/gogoc/README.debian，解决办法有两种：
passwd=password
server=authenticated.freenet6.net
auth_method=any
host_type=router
prefix_len=64
if_prefix=eth1
log_stderr=0
log_file=3
cat > "$rtadvdconfigfile" <<EOF修改cat行和EOF行之间的内容就好了，比如把AdvLinkMTU调大。
##### rtadvd.conf made by gogoCLIENT ####
interface $TSP_HOME_INTERFACE
{
AdvSendAdvert on;
AdvLinkMTU 1280;
prefix $TSP_PREFIX::/64
{
AdvOnLink on;
AdvAutonomous on;
};
};
EOF
#define IP_OFFSET 0x1fff总结：不纠结于那8+5=13的比特边界，先把数据转成宿主机的格式（ntohs），然后换照“绝对参照”中的逻辑，该怎么操作就怎么操作，操作完成后，再转成目标尾端（htons）。
#define IP_MF 0x2000
frag_off_6 = (ntohs(frag_off_4) & IP_OFFSET) << 3;
frag_off_6 &= 0xfff8;
frag_off_6 |= (ntohs(frag_off_4) & IP_MF) ? 0x0001 : 0x0000;
frag_off_6 = htons(frag_off_6);
struct iphdr {计算机在读写内存的时候，逻辑上最小的单位是1个字节，也就是8比特。IPv4头部中version和ihl各占4比特，编译器要把它们组装成1个字节。一般来说，传输时，version在前，ihl在后。因此，这2个4比特的组装顺序不是儿戏。
#if defined(__LITTLE_ENDIAN_BITFIELD)
__u8 ihl:4,
version:4;
#elif defined (__BIG_ENDIAN_BITFIELD)
__u8 version:4,
ihl:4;
#else
#error "Please fix <asm/byteorder.h>"
#endif
dpkg is the software at the base of the Debian package management system. dpkg is used to install, remove, and provide information about .deb packages.dpkg itself is a low level tool; higher level tools, such as APT, are used to fetch packages from remote locations or deal with complex package relations. Tools like aptitude or synaptic are more commonly used than dpkg on its own, as they have a more sophisticated way of dealing with package relationships and a friendlier interface.