Master Starting series of the DOS chapter-Overview

After DOS boot, will display "c:>" and a flashing cursor, this and is a DOS system prompt, it represents the current disk letter and directory, we can enter "[Letter]:" For conversion, such as "A:", "E:". Note that the input letter must be present. 3 File and directory computer data are mainly stored in the form of files, can also say that dos in the form of files to manage data. A file is a collection of related data, and some data is aggregated together to form a file. Each file has a file name, which consists of a main file name and a suffix name, separated by a small dot in the middle. DOS6.22 and its previous versions support only 8-character primary and 3-character suffix names, from http://www.aliyun.com/zixun/aggregation/13559.html ">windows The 95 DOS7.0 starts with a 128-character primary filename and suffix name. Letters, Chinese characters, numbers, and some special symbols such as "!, @, #" can be used as file names, but cannot have "/、、 、:,?" and other symbols. Usually we can see the file type by suffix name, such as: suffix name file type EXE executable program file COM executable command file BAT executable batch file DAT data file TXT text file BAK backup file SYS system files to facilitate user operation, DOS also allows you to use wildcard characters. The so-called wildcard character, is "? "and" * ", which can be used in place of certain characters in the filename. "？ "represents a valid character or null character, such as" AB? D.EXE "file can represent" ABCD. EXE "," ABDD. EXE "," Abzd. EXE "and so on. and "*" means several characters, such as "*. Bat "represents all files in the current directory that have a suffix named" bat. " DOS manages the disk as a directory tree, where the directory is equivalent to a folder in Windows. Like a folder, a table of contents is a layer of the form of a tree. The lowest directory in a letter is the root directory, the directory under the root directory is called its subdirectory, the root directory with "", a directory of the upper level directory with "..." Said。 We can find a file or directory through the path, like the address, so that users can easily and accurately search. For example, "C:windowscommanddeltree.exe" is a path to a file. Files or directories with the same name are not allowed in the same directory.