http://en.wikipedia.org/wiki/Ubuntu_%28operating_system%29

Releases

Ubuntu release Debian release
15.10 wily jessie / sid
15.04 vivid jessie / sid
14.10 utopic jessie / sid
14.04 trusty jessie / sid
13.10 saucy wheezy / sid
13.04 raring wheezy / sid
12.10 quantal wheezy / sid
12.04 precise wheezy / sid
11.10 oneiric wheezy / sid
11.04 natty squeeze / sid
10.10 maverick squeeze / sid
10.04 lucid squeeze / sid

Bug Reports

System Administration

Creating a User Account

https://help.ubuntu.com/14.04/serverguide/user-management.html#adding-deleting-users

$ sudo useradd -m -c "Arto Bendiken" -G staff,adm,sudo -s /bin/bash arto
$ sudo passwd arto
$ sudo useradd -m -c "Buildbot slave" -r buildbot

System Information

Release Information

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.1 LTS
Release:        14.04
Codename:       trusty

System Configuration

Disable Apport

$ echo enabled=0 > /etc/default/apport
$ sudo service apport stop

Firewall Configuration

$ ufw disable
$ ufw allow ssh/tcp
$ ufw allow http/tcp
$ ufw allow https/tcp
$ ufw allow ...
$ ufw enable
$ ufw status verbose
$ ufw deny from 1.2.3.4
$ ufw delete deny from 1.2.3.4

Network File System (NFS)

Configure NFS client

$ apt install nfs-common
# configure 'Domain =' in /etc/idmapd.conf
# configure mounts in /etc/fstab

Post-Installation Tasks

Upgrade the kernel and system packages

$ apt update
$ apt upgrade
$ reboot

Install some base packages

$ apt install acpid     # on virtual machines
$ apt install git       # for revision control
$ apt install joe       # my preferred simple editor
$ apt install tree

Disable PulseAudio

This is only applicable to the Desktop edition:

$ mkdir -p ~/.config/pulse
$ echo autospawn=no > ~/.config/pulse/client.conf
$ pulseaudio -k

Free disk space

$ apt-get clean

Software Development

Toolchain Repositories

$ sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
$ sudo add-apt-repository -y "deb http://llvm.org/apt/trusty/ llvm-toolchain-trusty-3.5 main"

Common Lisp Development Environment

$ sudo apt install clisp         # GNU CLISP
$ sudo apt install ecl ecl-doc   # Embeddable Common Lisp (ECL)
$ sudo apt install gcl gcl-doc   # GNU Common Lisp (GCL)
$ sudo apt install sbcl sbcl-doc # Steel Bank Common Lisp (SBCL)
$ sudo apt install cl-asdf
$ sudo apt install cl-launch --without-recommends

Package Installation

Core Utilities

$ sudo pkg_add bash
$ sudo pkg_add curl
$ sudo pkg_add wget
$ sudo pkg_add rsync
$ sudo pkg_add tree
$ sudo pkg_add git
$ sudo pkg_add screen--
$ sudo apt install strace

Text Editors

$ sudo apt install joe
$ sudo apt install vim-nox
$ sudo apt install emacs24-nox

Toolchain

$ sudo apt install make autoconf automake libtool
$ sudo pkg_add g++-4.9.0p0
$ sudo apt install clang-3.5

Python

$ sudo apt install python-pip

GUI

$ sudo apt install lxde xinit