how to avoid ransomware

Here are some of the things you can do in Java programming that refer to the summary of your network resources. 1. Try to use a single case on the right occasion Using a single example can reduce the load burden, shorten the loading time, improve the efficiency of loading, but not all places are applicable to the single case, in simple terms, single cases are mainly used in the following three aspects: First, control the use of resources, through thread synchronization to control the concurrent

effective mechanism for deadlock prevention. However, this approach requires you to know in advance all the locks that may be used (the translator notes: And to sort the locks appropriately ), but there are times when they are unpredictable.Lock time limitAnother way to avoid deadlocks is to add a timeout when trying to acquire a lock, which means that the thread will discard the lock request if it exceeds the time limit in the attempt to acquire the

is an effective mechanism for deadlock prevention. However, this approach requires you to know in advance all the locks that may be used (the translator notes: And to sort the locks appropriately ), but there are times when they are unpredictable.Lock time limit Another way to avoid deadlocks is to add a timeout when trying to acquire a lock, which means that the thread will discard the lock request if it exceeds the time limit during the attempt to

Some of the user's behavior is really out of the doubt ..., open the Web page something is all right to Refresh you, this action seems harmless, but in the case of just executed Submit, Refresh page will cause repeated execution, this is why in the major shopping site transactions payment action, will prompt " Do not close the Web page or rearrange messages that avoid causing a transaction to fail or repeat transactions, but as a matter of experience,

(Saxparseexception e) throws saxexception {throw e; @Override public void FatalError (Saxparseexception e) throws saxexception {throw e; } }); return Builder.parse (XML); } Obviously it's not a good way to handle it. Because the configuration file will be repeated multiple times. 1. First time optimization: Why not read it once and then cache it? Then other methods use the cache directly when calling Loadroot (). But there is a problem, InputStream can not be cached, and

Google supplements are part of Google's secondary index, but as an auxiliary, supplemental index. Supplements are kept in Google's secondary database, and it is generally difficult to get a good ranking. Today, Xuzhou website construction billion to tell you how to avoid becoming Google supplemental materials. For a page, if the page is listed as a supplemental material by Google, this is a very unfortunate thing for the site. The pages listed as sup

talk about how to effectively avoid excessive optimization. Anchor text to do not the same: anchor text generally refers to the internal link between the text and the external link text, internal links to the anchor text can not all point to the home page, many owners in the article inside their own add a home page target keyword, and then link to the first page of the URL, basic each of the pages are such treatment, in fact, this is not good, And m

Repeat | Repeat submit have you ever encountered a "repeat submission" problem? It is not difficult to solve the problem. Here's a simple way to avoid duplicate submissions of the same form. First, we can define a session variable to hold the submit sequence number of a form. Here I define "$userLastAction". Then add a hidden variable to the form and set the value to $userlastaction+1: Finally, determine if the form has been submitted before processin

Mention Spider trap, have a lot of friends will think Spider trap is a black hat method, and do spider trap will be k off site, so have a lot of friends will avoid spider traps, in fact, spider traps are not completely black hat method, and some friends will ask, then spider traps belong to what? actually correctly defined spider traps are divided into two kinds, One is a malicious trap, another is not a malicious trap, and for the two types of traps,

Tags: mysql performance default performance boost A [1] BSP fixed settingDue to the complexity of the database, baseless assertion space is very large, fast catching up with TCM regimen. Avoid using NULL for reasons that are mentioned in high-performance MySQL for a while. We suggest that you read more books and watch less artifice on the Internet. The book has been deliberately turned out to extract the following for reference:To

How is the zombie process generated in the title Unix/linux system? What's the harm? How to avoid it?When a process calls the Exit command to end its own life, he is not actually destroyed, but rather leaves behind a data structure called the zombie process (Zombie) (System call exit, whose role is to make the process exit, but only a normal process becomes a zombie process, not be completely destroyed). In the state of the Linux process, the zombie p

The focus of this article is to avoid invalid wake-up of kernel threads and focus primarily on the design of consumer threads.Therefore, in order to save trouble, here and the producers, consumers themselves, the processing process may not be rigorous.1. ProducersA kernel thread that wakes the consumer after each product is produced, and then sleeps for 1 seconds.2. ConsumersA kernel thread, whenever awakened, consumes goods and then goes to sleep.The

four necessary conditions of a deadlock 1. Mutually exclusive conditions (Mutual exclusion): Resources cannot be shared and can only be used by one process. 2. Request and retention conditions (Hold and wait): a process that has already been resourced can request a new resource again. 3. Non-deprivation (No pre-emption): Resources that have been allocated cannot be forcibly deprived from the corresponding process. 4. Cyclic wait condition (circular waiting): Several processes in the system f

capacity of the participants, which is unavoidable. But I am more willing to believe that communication is not smooth, poor habits, lack of transposition thinking and other factors are the most common. The discussion of several issues in the knowledge of the various roles may play a role in exchanging places between different players, and undoubtedly, this is a matter of positive significance to all parties. Product Manager as a link between the central node, to

Maybe when you are typing, you often encounter typos in the situation, we should how to avoid it, here from a few aspects to explain. How to avoid typos in input method If the pronunciation is the same as the wrong word, may be used pinyin input method to write these two lines, and then the word system to the banner. Of course, this is only the editor's guess, the cultural unit has made an apology, we will

For many people, migrating to Linux is a pleasure. For others, it was a nightmare. Especially for some administrators who just stepped into Linux management, if you don't avoid some common mistakes, it's easy to pose a security risk to your organization's network or system. This article will provide some advice to help these novices avoid these mistakes. Error One: Download and install various types of app

the server every 1KB after all data is sent.And after the server establishes the socket interface connection, reads 4KB data from the client each time, after receiving the data, sends the data directly back to the client.Paradoxically, because the client sends a 10MB size of data, which is sent for a longer period of time, there is no way to read the data during the sending process, so the data returned by the server accumulates in the client's receive buffer.When the receive buffer is full, th

: # A ugly, slow way to build a list words = [' Her ', ' name ', ' are ', ' Rio '] alist = [] for word in words: Ali St.append foo (word) You can use list resolution to override: words = [' Her ', ' name ', ' is ', ' Rio '] alist = [foo (word) for word in words] Why did you do that? On the one hand, you avoid the error of correctly initializing the list, on the other hand, this code makes it look clean and tidy. For those

No one likes null pointer exceptions! Is there any way to avoid them? Well, maybe. This article will discuss the following technologies 1.Optional type (newly introduced in Java 8)2.Objects Class (Java 7 Central) The optional class in Java 8 What is it? New types introduced in 1.Java 82. It is a wrapper for a specified type of object or for a scenario where the object (NULL) does not exist In short, it is a better alternative to handling null va

exclusive condition: A resource can only be used by one process at a time. (2) Request and retention conditions: a process that is blocked by requesting resources, keeps the resources that have been acquired. (3) cannot preempt the condition: the resources which the process has obtained, can not be forcibly deprived before the end use, can only be released by itself when the process is finished using. (4) Cyclic waiting condition: the process of forming a kind of end-to-end circular waiting res