Windows system file suffix (extension) a brief introduction to

words file "suffix", should have all know? Its meaning is to indicate the type of a file. Different types of files have different roles and must be opened with different tools. For example, common .txt, .mp3, .jpg, .rar are the suffixes. Each file ends with a .xxx end, don't believe it. I believe everyone knows what type of file is represented by the previous suffixes? .txt stands for text document, which is created with Notepad. Usually, most mobile phones support this file format. .jpg The most commonly used image format, but not the best, mainly because this format takes up a small amount of space, but the quality is poor. When you double-click on a text document (end of .txt), do you know why it automatically opens with Notepad? Instead of using windowsmedia to open it? In fact, this involves the "file association", in fact, windows defaults to some format files with the corresponding tools to open. You can also open a text document with windowsmedia. Simply right-click and select “Open with”, then select windowsmedia, and tick the following options. You will find that the file icons of all text documents are changed to windowsmedia. You can't open it successfully either. At this point, if you double-click on the text document, it will automatically open with windowsmedia. The above is the relationship between files and software. It is also the default software that is often said, such as a video file. If you open it with Storm Video, you will automatically open it with Storm video when you double click. The most funny thing is that if there are 2 different players on the computer
, it will be interesting, you will find that your video file icon will change to …… after all, the player wants to Use yourself as the default playback software. If you don't want to bother, you have to set it yourself. Otherwise, I will look awkward. But for a file, what tool is used to open it is not much different, it changes, its file type is unchanged, .rmvb or .rmvb. For example: For a text document, double-click to rename, change the suffix .txt to .jpg, and then save, what happens? First of all, the file icon will change; secondly, the double-click to open will use the default software of the .jpg format file to open, instead of the notebook, of course, can not open, there will be garbled. The following content is the focus of this article: Through the above introduction, you should understand what you understand and don't understand. Here I thought of a simple encryption method: for example, for an image file (for example, the suffix is ​​.jpg), what if you don't want to be seen by others? What hides everything is pediatrics and it's still cumbersome. It's even more troublesome to use encryption tools. At this point we can change the suffix name, and change the .jpg to a normal file format such as .wbj or .mp3. In this case, others will not be able to open the file normally, even if it is opened, it is garbled. If we want to open it, we will change the suffix name back. (Remember that it was a suffix before, don't forget to change it, don't blame me). This method is simple and easy to use, and is suitable for some computer whites. Haha … … There are a lot of content about the suffix, for example, there are too many formats for video files: .rmvb, .mp4, .avi, .…… I can't remember it for a while, what difference is there between them? Oh, the difference is yes, I have nothing to do research!