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The difference between a Linux soft connection and a hard link 2011-06-27Zale's picture ... read 3345 transfer Go to my library.Share: 4 points Different:(1) Soft connection can cross file system, hard connection is not possible. The practice is to use shared files to connect aa.txt text documents under Windows to Linux under the/root directory BB,CC. Ln-s Aa.txt/root/bb Connection succeeded

In an interrupted system, the interrupt ISR should be designed to be as small as possible and, when processing interrupts, it is not allowed to interrupt the ISR and be interrupted by other subsequent interrupts, that is, to avoid interruption of nesting. Now most systems do not support interrupt nesting, Linux implementation is a typical. The way to prevent an interrupt nesting is to handle an interrupt when CPU execution is interrupted and no other interrupts are received. But this kind of int

Idle to Nothing, with Java's soft reference to write a cottage cacheBlog Category: Java Basics It is well known that references in Java are divided into Strongreference, SoftReference, WeakReference, Phantomreference. These kinds of references have different uses of the scene, usually we use the most frequent is the strongreference, that is to say the form of such a reference:Object obj = new Object ();such a reference is called a strong

The previous few days in the Linux system to install MongoDB, and then run the script to import data when the link library encountered the query is not the case, 1 shows. The problem was solved by creating a soft connection. Although, through the online tutorials to solve the problem, but for soft connections and hard links are always not very clear. Take advantage of the weekend to make up for the lessons,

　　Java from JDK1.2 version begins by dividing the object's references into four levels, giving the program more flexibility in controlling the object's life cycle. These four levels are high to low in order: Strong references, soft references, weak references, and virtual references. Here are some highlights of soft and weak references.If an object has only soft

I. Overview of issues When the edit box input content will pop up the soft keyboard, and the mobile screen area is limited will often obscure the input interface, we first look at the problem Effect chart: When you enter a username and password, the system will eject the keyboard, causing the system keyboard to block the text box, as shown in the figure: Enter the password when the input box is blocked by the system keyboard, greatly reducing t

If there is an important way to promote the site, by Seor Welcome, high-quality Soft Wen not only can bring a lot of traffic, but also bring a lot of links, guide spiders to our site, increase the weight of the site, so the soft text promotion is the best way to promote the site optimization. Soft text promotion is also a lot of seor talk about the hardest way. S

Seoer all understand the status of soft text in the website promotion, soft text promotion is conducive to the site's outside the chain and keyword promotion, brand-building than to create a strong flow of more development value. Soft Wen is a high-quality outside the chain, not only can give their own site to improve rankings, but also can attract spiders crawli

No. 0 Chapter Introduction Bitcoin is a set of software, the software code to modify the upgrade will often involve two concepts, one is called a hard fork, a soft fork. What the hell does that mean? The most common definition in the community is the revision of consensus. But "consensus" specifically refers to what is difficult to understand. Let's actually modify the code level to see how they are defined. Chapter 1th transaction format and transa

Search engine marketing is the network marketing, its representative for the Enterprise station network sales for the structure of the main, users by clicking the corporate website to understand the brand image to promote sales. However, whether it is a personal station, or the enterprise station is no doubt the competitive pressure is very huge, the enterprise station is not the pursuit of simple home optimization, more important is to do fine to be strong in order to economic entity on the reg

The author has just participated in the nineth A5 of soft writing and soft Wen marketing training, training content is mainly soft writing skills and soft marketing skills. Yesterday, the teacher introduced in the class, soft Wen mainly includes three categories, experience,

1. Strong, soft, weak, and virtual references to objectsIn previous versions of JDK 1.2, if an object was not referenced by any variable, the program could no longer use the object. That is, only the object is in the accessible (reachable) state before the program can use it. Starting with JDK version 1.2, the reference to the object is divided into 4 levels, giving the program more flexibility in controlling the object's life cycle. These 4 levels ar

Learn about Linux file systems from InodeHard links and soft links are an important concept in the Linux file system, which involves index nodes (index node, also called Inode) in the file system, and the index node object is one of the four basic concepts of the Linux virtual file system (VFS). By dissecting the links and differences between hard links and soft links, we have a better understanding of the

Bottom-halfhttp://bbs.csdn.net/topics/60226240See in interrupts, exceptions, and system callsLinux interrupt services are generally performed in the case of a shutdown interrupt, to avoid nesting but to control complicationsLinux divides some interrupt processing into two parts, the first part is executed under the condition of shut off, has "atom" sex, and it is usually to be executed immediately after the interruption occurs, the second part is bottom half, is executing under the condition of

In Linux, the kernel assigns an Inode (index node) to each newly created file, and each file has a unique inode number. The file attributes are stored in the index node, and when the file is accessed, the index nodes are copied to the inside to enable fast access to the file. A link is a way to establish a connection between a shared file and a number of directory entries for the user who accesses it. Linux includes two kinds of links: Hard link (Hard link) and

Knowing the concepts of weak references and soft references are different from how they are used, and referencing classes play an important role in the process of garbage collection. We all know that the garbage collector reclaims the memory of objects that match the recycle criteria, but not all programmers know that the recycle condition depends on the type of reference to the object. This is the main difference between weak and

In Linux, the kernel assigns an Inode (index node) to each newly created file, and each file has a unique inode number. The file attributes are stored in the index node, and when the file is accessed, the index nodes are copied to the inside to enable fast access to the file. A link is a way to establish a connection between a shared file and a number of directory entries for the user who accesses it. Linux includes two kinds of links: Hard link (Hard link) and

When it comes to soft parsing (soft prase) and hard prase, it is impossible to talk about Oracle's handling of SQL. When you issue an SQL statement to Oracle, Oracle performs several steps in this SQL process before executing and getting results:1, grammar check (syntax check)Check whether the spelling of this SQL is syntax.2. Semantic checking (semantic check)such as checking the presence of an Access obje

Now soft marketing is getting more and more hot, it can be said that the previous era of hard advertising has been gradually replaced by this soft text advertising. As a webmaster or seoer, write a good soft wen is a required course, and currently the most popular soft products are not

I. Soft interrupts and tasklets 1. Delayed processing of interrupts In the process of interruption, there are some non-critical tasks that can be deferred for a period of time when needed. For an interrupt service program, a new interrupt should not be generated if it does not end execution, and these deferred tasks can be executed in the case of an open interrupt, thus extracting them from the Interrupt service program to reduce the kernel's respo