External command is actually aDOSapplication.
These external commands exist in the form of files.
DOS external command of Windows system is saved in the Command directory which is under the Windows root directory.
Introductions to Common External Command Features
DISKCOPY: copy whole disk command
1).
Function: copy floppy with the same format and content
(2).
Style: external command
(3).
Format: DISKCOPY [drive letter1:] [drive letter 2:]
(4).
Its parameters are not very useful, so we will not talk much about them here.
If the parameter is not added, the result is a display of file attributes.
The parameter has two types: + ?
<>+ represents giving, and represents removal.
It has many parameters.
/S, the most commonly used one, can copy multiple subdirectories which are under one directory.
And /E can copy empty directory.
SCANDISK: disk scanning program
This command is very useful in actual operation.
It can scan and repair the disk, and this can solve mostdisk file corruption issues.
The format is SCANDISK [drive letter:] [parameter].
The following are some parameters.
Moreover, we can edit scandisk.ini setting and run scandisk/custom.
If there are many corrupted files, we can use /autofix to fix them automatically.
Otherwise, we will be very busy.
The format is CHKDSK [drive letter:] [parameter].
The most common parameter is /F:, which can repair the file errors.
MOVE (Move.EXE): move file command
We can move files by using this command.
The format is MOVE [source file] [destination path].
Wildcards can also be used.
DELTREE (Deltree.EXE): delete command
This is the enhanced version of DEL command.
We can delete the directory easily and permanently with this command.
The format is DELTREE [file/path] [parameter].
One parameter is /Y.
System will enquire each file when this parameter is used.
Choose >Y to accomplish deleting.
FDISK (Fdisk.EXE): partition command
The universal grammar of FDISK program command is FDISK/parameter switch.
The following are the function explanations
ACTOK
Parameter function: dont test whether the disk surface has bad sector.
It can partition the disk directly without checking if the disk surface has had sectors.
/CMBR
Parameter function: rebuild the function explanation of the specified disk master boot record.
This operation is equal to /MBRparameter.
The difference is /CMBR can specify disk.
FPRMT
Parameter function: enquire FAT16 or FAT32 under interactive mode.
The enquiry interface of whether supporting large-capacity hard disk or not will not appear when /FPRMT parameter is added.
Instead, the system will enquire about using FAT16 or FAT32file systemwhen we create a new partition each time.
Thus, we can set the format of each partition freely.
/LOG
Parameter function: create disklogical partitionand create logical disk with /LOG.
/LOG and EXT should be used at the same time.
/LOGO
Parameter function: create disk logical partition with FAT16 file system.
/MBR
Parameter function:rebuild primary disk Master Boot Record.
Remove system boot selection recorded on the Master Boot Record after uploadingWindows NTor Windows 2000.
/PRI
Parameter function: createprimary partitionwhich will beset as activeautomatically on the disk.
/PRIO
Parameter function: create primary partition with FAT16 file system.
And the primary partition will be set as active.
/Q
Parameter function: We dont need to restart computers after changing thepartition tableby using /Q parameter.
And this is a practical function.
If we need to run other software after running FDISK, we had better remember to use this parameter.
Among these parameters, /ACTOK, /MBR and /Q are most commonly used and practical.
In general, these parameters can make the FDISK program more comprehensive.
But the hidden parameters also have great dangers.
We should be careful when using them.
Operating Environment
These external commands are used in Windows or DOS.
