files] md5sum [
option] --check [
Compute or check 128-bit MD5 checksums. Used to verify that no change has been made to a file. With no files or - specified, read from standard input. The exit status is 0 for success and nonzero for failure.
Read the files in binary mode.
Check the MD5 sum and file information in the file argument (or standard input) against the corresponding files and verify that they are consistent. The input must have been generated by an earlier md5sum command.
Print usage information and exit.
Don’t generate output messages; the exit code indicates success or failure. Used only with --check.
Compute the MD5 sum for the specified string. This option does not take a file argument. Put quotes around the string if it contains spaces.
Read files in text mode. The default.
Print version information and exit.
Warn about improperly formatted checksum lines. Used only with --check.