Getting a unique id from a unix-like system

Question

I want to get from any Unix-like system (if this is possible) a unique id that will be persistent every time my application runs in the same machine. If it is possible, I wa

Answer 1

Another option is to use information derived from dmidecode, a command present on linux. This information is decoded from /dev/mem, therefore requiring root access.

The information dmidecode reads is known to be flawed, as some motherboard manufacturers lie or fake some of the fields.