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DD's command
2022-07-06 00:42:00 【Riding the waves】
dd: Copy a file in a block of a specified size , And perform the specified transformation at the same time of copying
Be careful : The place where the number is specified ends with the following characters , Multiply by the corresponding number :b=512;c=1;k=1024;w=2
Parameters | explain | |||||||||||||||||||||||||
if | file name | Input file name , Default to standard input . That is, specify the source file .< if=input file > | ||||||||||||||||||||||||
of | file name | Output file name , Default to standard output . I.e. designated purpose document .< of=output file > | ||||||||||||||||||||||||
ibs | bytes | Read in at a time bytes Bytes , That is, to specify a block size of bytes Bytes | ||||||||||||||||||||||||
obs | bytes | One output bytes Bytes , That is, to specify a block size of bytes Bytes | ||||||||||||||||||||||||
bs | bytes | Also set read in / The output block size is bytes Bytes | ||||||||||||||||||||||||
cbs | bytes | One conversion bytes Bytes , That is, specify the conversion buffer size | ||||||||||||||||||||||||
skip | blocks | Skip from the beginning of the input file blocks Block and start copying | ||||||||||||||||||||||||
seek | blocks | Skip from the beginning of the output file blocks Block and start copying Be careful : Usually only valid if the output file is disk or tape , That is, backup to disk or tape is valid | ||||||||||||||||||||||||
count | blocks | Just copy blocks Block , The size of the block is equal to ibs Number of bytes specified | ||||||||||||||||||||||||
conv | conversion | Convert the file with the specified parameters
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