Several Dangerous Commands in DOS - China DOS Union Forum

Dangerous Commands in DOS

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Briefly described as follows:
1. FORMAT Disk Formatting Command
Since the FORMAT command can format a used disk, thus deleting all files on the disk, before using this command, you should first use the DIR command to check whether the contents on the disk need to be retained. Also, pay attention to prevent mistakenly formatting the disk due to incorrect command input.
2. DISKCOPY Disk Copy Command
When this command is used for copying, regardless of whether the target disk already contains information, it will uniformly reformat the target disk to the same format as the source disk. Therefore, when using this command, on one hand, you should check whether there are useful files on the target disk, and on the other hand, also prevent mistaking the source disk and the target disk and formatting the source disk. You can protect the source disk by writing before copying.
3. BACKUP Disk Backup Command
Before using this command, if the /A parameter is not used, the original files on the target disk will be deleted. Therefore, before backing up, you should first check whether the contents on the target disk are useful, or use the /A parameter for backup.
4. DEL Delete File Command
Since this command can use wildcards * and? to delete a batch of files, to avoid mistakenly deleting a large number of files, it is recommended to first use the DIR command to check whether the files to be deleted are correct before executing this command.
5. COPY File Copy Command
Since the COPY command will overwrite the original files with the same name on the target disk when copying files, when naming the target file name, you should ensure that it does not have the same name as the original files on the target disk.

Floor1　ko20010214	Posted 2003-01-04 00:00
版主　Posts 1,628　Credits 7,296
Dangerous Commands in DOS / -------------------------------------------------------------------------------- Briefly described as follows: 1. FORMAT Disk Formatting Command Since the FORMAT command can format a used disk, thus deleting all files on the disk, before using this command, you should first use the DIR command to check whether the contents on the disk need to be retained. Also, pay attention to prevent mistakenly formatting the disk due to incorrect command input. 2. DISKCOPY Disk Copy Command When this command is used for copying, regardless of whether the target disk already contains information, it will uniformly reformat the target disk to the same format as the source disk. Therefore, when using this command, on one hand, you should check whether there are useful files on the target disk, and on the other hand, also prevent mistaking the source disk and the target disk and formatting the source disk. You can protect the source disk by writing before copying. 3. BACKUP Disk Backup Command Before using this command, if the /A parameter is not used, the original files on the target disk will be deleted. Therefore, before backing up, you should first check whether the contents on the target disk are useful, or use the /A parameter for backup. 4. DEL Delete File Command Since this command can use wildcards * and? to delete a batch of files, to avoid mistakenly deleting a large number of files, it is recommended to first use the DIR command to check whether the files to be deleted are correct before executing this command. 5. COPY File Copy Command Since the COPY command will overwrite the original files with the same name on the target disk when copying files, when naming the target file name, you should ensure that it does not have the same name as the original files on the target disk.

Floor2　Wengier	Posted 2003-01-04 00:00
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There are also commands such as FDISK, DELTREE, etc.

Floor3　kk9834	Posted 2003-02-03 00:00
初级用户　Posts 2　Credits 108
Can you tell me how to format the C drive? What are the specific steps? Please reply,各位大侠.

Floor4　ko20010214	Posted 2003-03-13 00:00
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First, type format c: in the command line. Then press the Enter key. That's it. If you want to quick format the C drive, add the /q parameter. That is, format c:/q. If you want to transfer the system so that the C drive can boot, add the /s parameter. That is, format c:/s. Note that the command line mentioned here is in systems like msdos6.22, msdos7.10, etc. In the WinME system, it does not support the /s parameter.