OCaml: Can't run utop after installing it
installation, ocaml, opam, utop
Solution
Regarding `utop`, it seems that you don't have in your `$PATH`. Did you do:
$ eval `opam config env`
If you want opam to be correctly automatically setup in your new shells you should add the following to your `.bashrc`:
. ~/.opam/opam-init/init.sh > /dev/null 2> /dev/null || true
As for not being able to open `Core.Std`, you won't of course be able to open it in your shell, this command must be issued in `utop`.
Problem
I'm trying to learn OCaml through the Real World OCaml book. They have a guide by which I am supposed to install the Core package and utop. However, while I seem to be successfully installing both of these using Opam, neither of them works when I try to use them. I know that they're installed, because when I try to install them again, I get this message: ``` $ opam install utop core [NOTE] Package utop is already installed (current version is 1.10). [NOTE] Package core is already installed (current version is 109.55.02). ``` However, when I try to enter "utop" to start utop, it doesn't work. ``` $ utop bash: utop: command not found ``` Same when I try to open core: ``` $ open Core.Std Couldn't get a file descriptor referring to the console ``` What's going on here? I'm new to programming so there might be something about installation that I'm just not understanding.