openssl−rand, rand − generate pseudo−random bytes
openssl rand [−help] [−out file] [−rand file...] [−writerand file] [−base64] [−hex] num
The rand command outputs num pseudo-random bytes after seeding the random number generator once. As in other openssl command line tools, PRNG seeding uses the file $HOME/.rnd or .rnd in addition to the files given in the −rand option. A new $HOME/.rnd or .rnd file will be written back if enough seeding was obtained from these sources.
Print out a usage message.
Write to file instead of standard output.
A file or files containing random data used to seed the random number generator. Multiple files can be specified separated by an OS-dependent character. The separator is ; for MS-Windows, , for OpenVMS, and : for all others.
Writes random data to the specified file upon exit. This can be used with a subsequent −rand flag.
Perform base64 encoding on the output.
Show the output as a hex string.
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Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.