[LeoPanthera]

You can do this with "shuf --random-source=/dev/urandom".

The same with gshuf.

I use an alias to add this switch by default.

[lucb1e]

When using shuf for cryptographic purposes, I'd first check if it advertises as being able to be a secure cryptographic token generator when provided with a secure random source. It might very well use modulo operations, for example.