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Add Generate Random 20-Character Hex String as a Unix TIL

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jbranchaud
2023-10-12 09:41:08 -05:00
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# Generate Random 20-Character Hex String
The `openssl` utility has a bunch of subcommands including `rand`. The `rand`
subcommand can be used to generate pseudo-random numbers.
```bash
openssl rand -hex 10
5ce459896581abc81a65
```
The number at the end of the command tells `rand` how many bytes of output to
generate. When the `-hex` flag is used, it will encode the output in hex.
The 10 bytes of output in hex will result in a 20-character string. That number
can be adjusted to your needs.
See `man openssl` or `openssl rand -help` for more details.