Implement hashsum

[GrayJack]

No description provided.

[palfrey]

Do you mean all the items from https://www.gnu.org/software/coreutils/manual/html_node/Summarizing-files.html except wc or something else? Possibly https://www.computerhope.com/unix/bash/hash.htm but AFAIK that's a bash builtin not part of coreutils

[GrayJack]

Kinda all the items from that list (except wc) but on only one binary, like specifying as a parameter the the type of hash that you want, that's the only util that I thought to move away from POSIX and GNU implementations

[GrayJack]

I'm thinking in something like this
hashsum <hash type> [FILE ...]