Where the commas indicate that the destination parameter has been intentionally left out. To assign the current time and date to a file without modifying the file, use the following syntax: copy /b +, To copy files that are 0 bytes long, or to copy all of a directory's files and subdirectories, use the xcopy command. The copy command assumes the combined files are ASCII files unless you use the /b option. If you specify more than one file in source, the copy command combines them all into a single file using the file name specified in destination. If the source file is on the current drive and in the current directory and you do not specify a different drive or directory for the destination file, the copy command stops and displays the following error message: File cannot be copied onto itself The new copy is stored in the current directory on the current drive. If you don't specify a destination file, a copy is created with the same name, modified date, and modified time as the original file. In ASCII mode, special characters might cause files to combine during the copying process. However, if you omit /b, the data is copied to the device in ASCII mode. In binary mode, copy /b copies all characters (including special characters such as CTRL+C, CTRL+S, CTRL+Z, and ENTER) to the device, as data. If destination is a device (for example, Com1 or Lpt1), the /b option copies data to the device in binary mode. You can substitute a device name for one or more occurrences of source or destination. The /z option also displays the percentage of the copy operation that is completed for each file. If the connection is lost during the copy phase (for example, if the server going offline breaks the connection), you can use copy /z to resume after the connection is re-established. To append files, specify a single file for destination, but multiple files for source (use wildcard characters or file1+ file2+ file3 format). By default, you are prompted when you replace this setting, unless the copy command is executed in a batch script. If /y is preset in the COPYCMD environment variable, you can override this setting by using /-y at the command line. The /v command-line option also slows down the copy command, because each sector recorded on the disk must be checked. Although recording errors rarely occur with the copy command, you can use /v to verify that critical data has been correctly recorded. If a write operation cannot be verified, an error message appears. If /b follows destination, the copy command doesn't add an end-of-file character (CTRL+Z). If /b follows source, the copy command copies the entire file, including any end-of-file character (CTRL+Z). The effect of /b depends on its position in the command–line string: In this case, /a applies to the file preceding /a. If /b precedes or follows a list of files on the command line, it applies to all listed files until copy encounters /a. b is the default value for copy, unless copy combines files. If /b directs the command interpreter to read the number of bytes specified by the file size in the directory. If /a follows destination, the copy command adds an end-of-file character (CTRL+Z) as the last character of the file. If /a follows source, the copy command treats the file as an ASCII file and copies data that precedes the first end-of-file character (CTRL+Z). The effect of /a depends on its position in the command-line string: In this case, /b applies to the file preceding /b. If /a precedes or follows a list of files on the command line, it applies to all files listed until copy encounters /b. You can copy an ASCII text file that uses an end-of-file character (CTRL+Z) to indicate the end of the file. Destination can consist of a drive letter and colon, a directory name, a file name, or a combination of these. Specifies the location to which you want to copy a file or set of files. Source can consist of a drive letter and colon, a directory name, a file name, or a combination of these. Specifies the location from which you want to copy a file or set of files. Prompts you to confirm that you want to overwrite an existing destination file.Ĭopies networked files in restartable mode. Suppresses prompting to confirm that you want to overwrite an existing destination file. Uses a short file name, if available, when copying a file with a name longer than eight characters, or with a file name extension longer than three characters. Verifies that new files are written correctly. Syntax copy ] ]Īllows the encrypted files being copied to be saved as decrypted files at the destination. For more information about the recovery console, see Windows Recovery Environment (Windows RE). You can also use the copy command, with different parameters, from the Recovery Console.
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