Update ubuntulinux.rst

Adding the Docker repository key fails if port 11371 not open. This would probably work for more people.
Using names in docker ps --since-id/--before-id, resolves #3565

Also renames --since-id/--before-id to --since/--before and add errors
on non-existent containers.
Docker-DCO-1.1-Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com> (github: LK4D4)
Add upstart nofile/noproc similar to systemd init
Docker-DCO-1.1-Signed-off-by: Brian Goff <cpuguy83@gmail.com> (github: cpuguy83)
Merge pull request #4740 from vojnovski/patch-1

Update ubuntulinux.rst
Merge pull request #4749 from cpuguy83/add_nofile_noproc_settings_to_upstart

Add upstart nofile/noproc similar to systemd init
Merge pull request #4744 from LK4D4/fix_issue_#3565

Using names in docker ps --since-id/--before-id, resolves #3565
Add image size to history docs

Fixes #3147
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Merge pull request #4755 from crosbymichael/add-size-to-history-docs

Add image size to history docs