My ubuntu 20 Setup

Create a new user

adduser --disabled-password <your_username>
usermod -aG sudo <your_username>
su - <your_username>

And then update .ssh/authorized_keys with your ssh public key.

sudo apt install -y zsh
sh -c "$(curl -fsSL https://raw.github.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"

chmod +x ./setup.sh ./tmux.sh
./setup.sh

Follow the prompt and finish installing all softwares.

source ~/.zshrc