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In computing, ren (or rename) is a command in various command-line interpreters such as COMMAND.COM, cmd.exe, 4DOS, 4NT and Windows PowerShell. It is used to rename computer files and in some implementations (such as AmigaDOS [1]) also directories. It is analogous to the Unix mv command.
The REN command renames a file. Unlike the move command, this command cannot be used to rename subdirectories, or rename files across drives. Mass renames can be accomplished by the use of the wildcards characters asterisk (*) and question mark (?). [25]
In computing, rename refers to the altering of a name of a file. This can be done manually by using a shell command such as ren or mv , or by using batch renaming software that can automate the renaming process.
COMMAND.COM is the default command-line interpreter for MS-DOS, Windows 95, Windows 98 and Windows Me.In the case of DOS, it is the default user interface as well. [2] It has an additional role as the usual first program run after boot (init process), hence being responsible for setting up the system by running the AUTOEXEC.BAT configuration file, and being the ancestor of all processes.
When managing large amount of files, such as a picture database, a batch renamer is more or less essential for the task of maintaining filenames without too much manual labour. When authoring music files onto a CD/DVD or transferring the files to a digital audio player, a batch renamer can be used to listen to songs in desired order.
To get a command prompt with Unicode instead of Code page 437 or similar, one can use the cmd /U command. In such a command prompt, a batch file with Unicode filenames will work. Also one can use cmd /U to directly execute commands with Unicode as character set. For example, cmd /U /C dir > files.txt creates a file containing a directory ...
The Call command allows subroutines within batch file. The Call command in COMMAND.COM only supports calling external batch files. File name parser extensions to the Set command are comparable with C shell. [further explanation needed] The Set command can perform expression evaluation. An expansion of the For command supports parsing files and ...
cmd.exe – The program implementing the Windows command-line interpreter Foreach loop – The FOR and FORFILES commands both implement a for-each loop find (Unix) – Unix command that finds files by attribute, similar to forfiles