Supplementary note: E2fsck after the implementation of the return value and representative meaning is as follows. 0 No error occurred. 1 File system error has occurred and has been fixed. 2 File system error has occurred and has been fixed. 4 File system error, but no correction. 8 error occurred while operating. 16 The syntax used has an error. 128 Shared function library has an error. Parameters: -A automatically fixes the file system without asking the user for advice. -b<superblock> specifies Superblock, instead of using a preset superblock. -b< Chunk Size > Specifies the size of the block, in bytes. -C executes badblocks to mark damaged blocks. -C records the information of the inspection process in the file descriptor, so that the entire inspection process can be fully monitored. -D Displays the error information. -F checks for correctness even if there are no indications of error in the file system. -F clears the buffer of the device prior to execution. -l< file > Add the blocks specified in the file to the list of corrupted blocks. -l< file > Clears the list of corrupted chunks before adding the blocks specified in the file to the list of corrupted blocks. Therefore, the blocks in the corrupted block list are the same as the blocks specified in the file. -N Opens the file system in read-only mode and performs non-interactive execution, and all problem dialogs are set to answer "no". -P automatically fixes the file system without asking the user for advice. -r This parameter exists only for compatibility and does not work. -S if the file system byte order is not appropriate, swap byte order, otherwise do not do any action. -S swaps byte order regardless of the file system byte order. -T displays time information. -V displays detailed information when executing. -V Displays version information. -Y takes a non-interactive approach to execution, and all questions are set to answer yes.
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