opam software package provides package manager for OCaml, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install opam
opam is installed in your system.
Make ensure the opam package were installed using the commands given below,
$ sudo dpkg-query -l | grep opam *
You will get with opam package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Ocaml |
| Package | opam |
| Version | 1.1.1-1 |
| Description | package manager for OCaml |
| Sub Section | Ocaml |