Linux

Added screenfetch to my ~/.zshrc file

vi ~/.zshrc

# Enable colors and change prompt:
autoload -U colors && colors
PS1="%B%{$fg[red]%}[%{$fg[yellow]%}%n%{$fg[green]%}@ZSH:%{$fg[blue]%}%M %{$fg[magenta]%}%~%{$fg[red]%}]%{$reset_color%}$%b "

# History in cache directory:
HISTSIZE=10000
SAVEHIST=10000
HISTFILE=~/.cache/zsh/history

# Basic auto/tab complete:
autoload -U compinit
zstyle ':completion:*' menu select
zmodload zsh/complist
compinit
_comp_options+=(globdots)               # Include hidden files.

screenfetch

# Load zsh-syntax-highlighting; should be last.
source /usr/share/zsh/plugins/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh 2>/dev/null

on Terminal start I see

Forgot, how to install zsh on Linux (Ubuntu/Debian distros)

sudo apt-get install zsh

change to your default shell
chsh -s $(which zsh)
logout and back in