Computers are deterministic, predictable machines and are designed to blindly follow sets of instructions in a repeatable manner. This nature of computers has, of course, served us extremely well for most of the last century, but this design has a fundamental flaw: it cannot perform true random operations

Most popular programming languages have some form of random number generator built in that programmers can use. These generators usually take as input the current date and time, encode this value using an algorithm and output a value so different from the input that we perceive them as random. A pseudorandom number generator, also known as a deterministic random bit generator, is an algorithm for generating a sequence of numbers whose properties approximate those of sequences. random numbers.

On all Unix-like systems, including all Linux distributions, there is a pseudo device file
"/dev/urandom"

If it doesn't exist, it might indicate a problem with system's configuration. Or is not Linux.

"Looks random to me" - is a pretty poor judgment for me in determining if something is random.