The Linux Enterprise Cluster explains how to take a number of inexpensive computers with limited resources, place them on a normal computer network, and install free software so that the computers act together like one powerful server. This makes it possible to build a very inexpensive and reliable business system for a small business or a large corporation. The book includes information on how to build a high-availability server pair using the Heartbeat package, how to use the Linux Virtual Server load balancing software, how to configure a reliable printing system in a Linux cluster environment, and how to build a job scheduling system in Linux with no single point of failure.
The book also includes information on high availability techniques that can be used with or without a cluster, making it HELPful for System Administrators even if they are not building a cluster. Anyone interested in deploying Linux in an environment where low cost computer reliability is important will find this book useful.
實用的單片機開發與應用程序，包括：中值濾波子程序，AD轉換類程序，16、32位整型數開方，單片機音樂程序--祝你平安。對初學者很有幫助的。MCU development and practical applications, including: median filter subroutine, AD converter type of proceeding, 16,32-bit integer number prescribing, SCM music program - I wish you peace. HELPful for beginners.
The first edition of this book ranks among the small (very small) number of books that I credit with significantly elevating my skills as a professional software devel-oper. Like the others, it was practical and easy to read, but loaded with important advice. Effective C++, Third Edition, continues that tradition. C++ is a very powerful programming language. If C gives you enough rope to hang yourself, C++ is a hard-ware store with lots of HELPful people ready to tie knots for you. Mastering the points discussed in this book will definitely increase your ability to effectively use C++ and reduce your stress level.
基本的k-means聚類算法c++實現，對于理解算法的過程非常有幫助。 Basic implementation of k-means algorithm with c++, it is very HELPful to understand the procedure of k-means algorithm.
It is an experimental testing for python M2Crypto module. M2Crypto is not well document. User may not know how to use SHA256 when signing and verify with RSA. It also have not enough document to show how to use DES to encrypt and decrypt. Here also includes source codes for performance evaluation of the algorithms. This experimental program explore all this issue and may be HELPful for some one who using python for doing encryption with RSA and DES.
This paper addresses the subject of SQL Injection in a Microsoft SQL Server/IIS/Active
Server Pages environment, but most of the techniques discussed have equivalents in other
database environments. It should be viewed as a "follow up", or perhaps an appendix, to
the previous paper, "Advanced SQL Injection".
The paper covers in more detail some of the points described in its predecessor, providing
examples to clarify areas where the previous paper was perhaps unclear. An effective
method for privilege escalation is described that makes use of the openrowset function to
scan a network. A novel method for extracting information in the absence of HELPful
error messages is described the use of time delays as a transmission channel. Finally, a
number of miscellaneous observations and useful hints are provided, collated from
responses to the original paper, and various conversations around the subject of SQL
injection in a SQL Server environment.
The MD5 Message-Digest Algorithm
Status of this Memo
This memo provides information for the Internet community. It does
not specify an Internet standard. Distribution of this memo is
unlimited.
Acknowlegements
We would like to thank Don Coppersmith, Burt Kaliski, Ralph Merkle,
David Chaum, and Noam Nisan for numerous HELPful comments and
suggestions.
Patch to apply U-Boot for PXA270 with mainstone board. Should be useful to many people ... can also be HELPful for people who are insterested in cross-platform porting
