md5sum

Calculate MD5 cryptographic checksums. More information: https://www.gnu.org/software/coreutils/manual/html_node/md5sum-invocation.html.

• Calculate the MD5 checksum for one or more files:

md5sum path/to/file1 path/to/file2 …

• Calculate and save the list of MD5 checksums to a file:

md5sum path/to/file1 path/to/file2 … > path/to/file.md5

• Calculate an MD5 checksum from stdin:

command | md5sum

• Read a file of MD5 checksums and filenames and verify all files have matching checksums:

md5sum --check path/to/file.md5

• Only show a message for missing files or when verification fails:

md5sum --check --quiet path/to/file.md5

• Only show a message when verification fails, ignoring missing files:

md5sum --ignore-missing --check --quiet path/to/file.md5

• Check a known MD5 checksum of a file:

echo known_md5_checksum_of_the_file path/to/file | md5sum --check