Linux in the magical effect of the tab key

Linux in the long file names is really can bring us "look, the business benefits of associated input long directory names and long file names, however, the tab key in Linux just to compensate for this.

The tab key two major roles: 1, simply enter the file or directory name in the first few characters, and then press the tab key, if there is no overlap, the full file name automatically appears in the command line; where there is overlap, then press the TAB key, the system lists all the current directory to the few characters at the beginning of the name. 2. in the command line, simply enter for example "m", and then press the tab key twice, the system will list all the "m" command (including custom Bshell command function), to find some can't clear command-specific use. For example, type "ftp", you will find that ftpcount, ftp, such as the ftpshut ftpwho unfamiliar command.