Ubuntu Desktop 20 LTS note

Ubuntu 20.04.3 LTS (Focal Fossa)

Ubuntu is the world’s most popular open-source desktop operating system. Ubuntu 20.04 LTS is an enterprise-grade, secure, cost-effective operating system for organisations and home users.

Zsh Prezto

Install Prezto

sudo apt-get install -y git
sudo apt-get update && sudo apt-get install -y zsh
# Get prezto
git clone --recursive https://github.com/sorin-ionescu/prezto.git ~/.zprezto

# Backup zsh config if it exists
if [ -f ~/.zshrc ];
        mv ~/.zshrc ~/.zshrc.backup

# Create links to zsh config files
ln -s ~/.zprezto/runcoms/zlogin ~/.zlogin
ln -s ~/.zprezto/runcoms/zlogout ~/.zlogout
ln -s ~/.zprezto/runcoms/zpreztorc ~/.zpreztorc
ln -s ~/.zprezto/runcoms/zprofile ~/.zprofile
ln -s ~/.zprezto/runcoms/zshenv ~/.zshenv
ln -s ~/.zprezto/runcoms/zshrc ~/.zshrc

Change theme & module

  • Update the theme ‘sorin’ to ‘steeef’ in .zpreztorc
  • Add following plugins
zstyle ':prezto:load' pmodule \
  'environment' \
  'terminal' \
  'editor' \
  'history' \
  'directory' \
  'spectrum' \
  'utility' \
  'completion' \
  'git' \
  'syntax-highlighting' \
  'history-substring-search' \

Change shell to Zsh

chsh -s $(Which zsh)
source ~/.zshrc

Install docker

Set up the repository

 sudo apt-get update

 sudo apt-get install \
    ca-certificates \
    curl \
    gnupg \

Add Docker’s official GPG key:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor \
    -o /usr/share/keyrings/docker-archive-keyring.gpg

# Use the following command to set up the stable repository. 
# To add the nightly or test repository, add the word nightly or test (or both) 
# after the word stable in the commands below. Learn about nightly and test channels.

echo \
"deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

Install Docker Engine

# Update the apt package index, and install the latest version of 
# Docker Engine and containerd, or go to the next step to install 
# a specific version:

 sudo apt-get update

 sudo apt-get install docker-ce docker-ce-cli containerd.io

Post installation of Docker

# Create the docker group.
sudo groupadd docker

# Add your user to the docker group.
sudo usermod -aG docker $USER

# Log out and log back in so that your group membership is re-evaluated.

# On Linux, you can also run the following command to activate the changes to groups:

newgrp docker

# Test the docker
docker ps

Add Docker completion to Zsh

  • Add the completion to prezto
curl -fLo ~/.zprezto/modules/completion/external/src/_docker \

  • Add following line to zshrc
autoload -Uz compinit; compinit


Set git credential store

git config credential.helper store	
# OR 
git config --global credential.helper store	

Dotnet Core 6 SDK

  • Add the Microsoft package signing key to your list of trusted keys and add the package repository.

wget https://packages.microsoft.com/config/ubuntu/20.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
sudo dpkg -i packages-microsoft-prod.deb
rm packages-microsoft-prod.deb

  • Install the SDK
sudo apt-get update; \
  sudo apt-get install -y apt-transport-https && \
  sudo apt-get update && \
  sudo apt-get install -y dotnet-sdk-6.0


  • Download & install the golang tal ball
# Download the linux tar ball from golang site
sudo rm -rf /usr/local/go && sudo tar -C /usr/local -xzf go1.17.5.linux-amd64.tar.gz
  • Set the Go to PATH on file .zshrc
export PATH=$PATH:/usr/local/go/bin
  • Verify the version
go version


  • Use universal script
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

Java: OpenJDK

  • Install LTS JDK
 sudo apt install -y openjdk-8-jdk \
    openjdk-11-jdk \

  • Setup default JDK
sudo update-alternatives --config java