md5sum [OPTIONS] [FILE]

-b, --binary
    read in binary mode

-c, --check
    read MD5 sums from the FILEs and check them

--tag  create a BSD-style checksum

-t, --text
    read in text mode (default)

-z, --zero
    end each output line with NUL, not newline, and disable file
    name escaping

The following five options are useful only when verifying checksums:

--ignore-missing
       dont fail or report status for missing files

--quiet
       dont print OK for each successfully verified file

--status
       dont output anything, status code shows success

--strict
       exit non-zero for improperly formatted checksum lines

-w, --warn
       warn about improperly formatted checksum lines

--help display this help and exit

--version
       output version information and exit

md5sum file1

md5sum file1 file2 file3 > hashes
md5sum --check hashes

md5sum --quiet --check hashes

md5sum --warn --check hashes