--- /dev/null
+meta4ra -- Metalink4 utilities
+
+meta4-create utility is used to create Metalink4
+(https://datatracker.ietf.org/doc/html/rfc5854)
+.meta4-file for single specified file.
+
+-fn NAME -- the only required option specifying file's name.
+-desc "..." -- set file's description.
+-mtime FILE -- let published date be equal to FILE's mtime.
+-sig FILE -- path to armored OpenPGP's signature file.
+-torrent URL -- set BitTorrent's URL.
+-hashes -- comma-separated list of colon-separated pairs of hash'es
+ name and the external command used to compute it. Command
+ shall take the data from stdin and print the digest in
+ hexadecimal form with the following newline to stdout.
+
+Following hashes are predefined by default:
+
+* sha-256:sha256 -- standardized name; standard command in many OSes
+ Maybe fast on hardware accelerated CPUs
+* sha-512:sha512 -- standardized name; standard command in many OSes
+ Faster on 64-bit CPUs than software sha-256
+* skein-256:skein256 -- non-standardized name; out-of-box command in FreeBSD
+ Faster than software sha-*/shake*
+* skein-512:skein512 -- non-standardized name; out-of-box command in FreeBSD
+ Faster on 64-bit CPUs than skein-256
+* shake128:shake128sum -- standardized name; command is in contrib/
+ Can be faster on hardware than sha-*/skein-*
+* shake256:shake256sum -- standardized name; command is in contrib/
+* streebog-256:streebog256sum -- non-standardized name; command is in contrib/
+* streebog-512:streebog512sum -- non-standardized name; command is in contrib/
+* blake3-256:b3sum -- non-standardized name; additional package in most OSes
+ Fastest parallelizeable software hash
+
+SHA2 and SHA3 (SHAKE*) are USA's NIST standards. Streebog is Russian
+Federation's government standard. Skein is SHA3-finalist. BLAKE3 is
+reduced round Merklee-tree-based BLAKE2 descendant. BLAKE2 is reduced
+round BLAKE, that also was one of SHA3-finalists.