bit set

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Talking about the decompile of Java program

compiling | programs Talking about the decompile of Java program Now that the Java language is wildly popular around the world, it is widely used in the production of Internet databases, multimedia, CGI, and Dynamic Web pages. Demand for Java

Suid Sgid parsing of Linux

The representation method and parsing of file permissions under Unix SUID is the set User ID, SGID is the meaning of the set Group ID. You can use the Ls-l command to see permissions for files under UNIX. The format of the notation obtained with

A tutorial on creating write-protected files under Linux

If you want to write-protect some of the important files in Linux so they can't be deleted or tampered with earlier versions or other things, or in other cases, you might want to avoid some of the configuration files being automatically modified by

Discussion on MPLS MTU problem

MPLS default MTU is 1500, do not make any changes, I ping full package does not fragment, why can pass! It adds MPLS information altogether is 1504 bytes, how can transmit? Here is my reply: It has been verified, what you need to do is to study

How to create and use a socket link pool

The use of CS procedures will inevitably encounter socket connection problems, many times, the use of the programming language with the socket library, the use of some of the unused, although the system with the library in a lot of exception

The mechanism of the firewall

What is a firewall? A firewall is a sort of filter plug (now you're not mistaken), you can make something you like go through the stopper, and everything else is filtered out. In the network world, to be filtered by the firewall is the

PHP file compression Phpzip Class usage Example

This article illustrates the Phpzip class usage of PHP file compression. Share to everyone for your reference. Specifically as follows: ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26-27--28 29---30 31--32 33 34 3

Learning to operate SEO does not necessarily make money from the Internet

Learn SEO can make money? I don't think so. In fact, the knowledge itself and must be able to directly give you money, only the knowledge is skillfully applied to practice, can make money. How to use knowledge reasonably and flexibly is to see how

Secure temporary files for Linux systems

In a typical Linux system, there are at least two directories or partitions that hold temporary files. One of these is the/tmp directory, and/var/tmp. In the newer Linux kernel system, there may also be/dev/shm, which is loaded with the Tmpfs file

ora-16664,ora-16625 and TNS-12537 Analysis

1.1. ora-16664,ora-16625,tns-12537 Main Library: 16664, 0000, "Unable to receive theresult from a database" *cause:during execution of a command, a Databasein the Data Guard Broker configuration failed to return a result. *action:check Data

Talking about the decompile of Java program

Now that the Java language is wildly popular around the world, it is widely used in the production of Internet databases, multimedia, CGI, and Dynamic Web pages. Demand for Java programmers in the United States exceeded c++! for the first time in 199

Explanation of UFT-8 and Unicode

What is Unicode? A mapping with characters and A is index, we use U+XXXX to represent it. Confuse with Unicode and UTF-8? Unicode is a standard char set, UTF-8 are one of implementation, just one of UCS-2, UCS-4 and so forth, but it becomes Stan

SQL Server 2000 Memory Management Insider

Introduction In this column, we will explore the SQL Server memory Management Insider from the developer's perspective. That is, we'll discuss how SQL Server uses APIs and operating system features to manage memory and how it works. Exploring a

Assembly language Programming (II.)

Iv. Module Segmentation Since it is called a module, there is no problem of dividing or not. If a programmer starts with the concept of a module, thoroughly understand its nature, of course, know how to design, naturally there is no need for

Actual user ID in Unix/linux, valid user ID and save settings User ID

Real User id: Actual username, refers to who the process performer is Effective User ID: Valid user ID, which is the access to the file when the process executes Saved Set-user-id: Save the Set User ID as a copy of the effective user ID, which

Linux-based packet filtering firewalls (2)

2nd chapter, using User Space command iptables implement packet filtering 2.1 Related knowledge of TCP/IP 2.1.1 Establish a TCP connection (implemented with 3 handshake) If server A and client B communicate. (1) b->; A. When b wants to communicate

C # Collection interface and BitArray

A Interfaces for collections in C #: ICollection Initialization object method for the collection interface: Icollection mycollect=new collection (); Now let's look at an interface for a collection of integer types Using

Assembly Source series of driver

This is the past DOS era of the compilation of source code, although has passed, but for the study of the assembly is still helpful, assembly language is just a basic programmer language, most people can grasp, not necessarily in-depth research.

Oracle's consistent read guarantees read not blocking write

A further step, for everyone to test, if manually the buffer header buffer pin memory bit set to 1, which is equivalent to adding a shared buffer pin lock, then another session, update this block, what will happen? 1, take T1 table of the first row

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