Dos Expand, fasthelp, FC command usage instructions

Expand: Decompression Tool

[Applicable occasions] Microsoft software Original installation disk has many suffixes to "_" the end of the compressed file, you can use it to extract, relieve you because of a few file loss caused by the trouble.

[Usage]expand [source filename] [destination file]

Example

C:\>expand A:vsafe.co_ c:\DOS\vsafe.com

Extract Vsafe.co_ as vsafe.com file

Microsoft (R) File expansion Utility Version 2.10

Copyright (C) Microsoft Corp. 1990-1993. All rights reserved.

Expanding A:vsafe.co_ to c:\DOS\vsafe.com. a:vsafe.co_:33046 bytes expanded to 62576 bytes, 89% increase.

C:\dos>

Fasthelp: Quick display of help information

[Suggest] You can look at all the commands, for individual commands, as well as after the command name plus/? parameter convenient

[Usage]fasthelp lists the usefulness of all DOS commands

fasthelp [command name] shows the use of a command, equivalent to [command name]/?

FC: File Comparisons

[Suggested] Maybe for most people it's never going to work.

[Usage]fc [filename 1] [filename 2] compare two file differences

Parameter also: a C l lbn N T w nnnn

Example

C:\TEST>FC A.bat B.bat

Comparing Files A.bat and B.bat

A.bat

Choice/c:dme Defrag,mem,end

if errorlevel 3 goto defrag

if errorlevel 2 goto MEM

If Errotlevel 1 goto end

B.bat Choice/c:dme Defrag,mem,end

C:\TEST >