6. seek=blocks: Skips the blocks from the beginning of the output file before starting the copy.
Note: It is usually only valid when the output file is a disk or tape, that is, it is valid when backing up to disk or tape.
7. count=blocks: Only blocks blocks are copied, the block size is equal to the number of bytes specified by ibs.
8. conv=conversion: Convert the file with the specified parameters.
Ascii: convert ebcdic to ascii
Ebcdic: convert ascii to ebcdic
Ibm: convert ascii to alternate ebcdic
Block: convert each line to cbs in length, and fill the space with spaces
Unblock: make each line the length of cbs, the insufficient part is filled with spaces
Lcase: convert uppercase characters to lowercase characters
Ucase: converts lowercase characters to uppercase characters
Swab: swap each pair of bytes entered
Noerror: does not stop when an error occurs
Notrunc: does not truncate the output file
Sync: fills each input block to ibs bytes, and the insufficient portion is filled with null (NUL) characters.
