Add zsh shell

gistfile1.txt

More info here:
https://github.com/robbyrussell/oh-my-zsh

1) Install zsh:
sudo dnf install zsh

2) Install zsh as the main shell (from Basic Installation)
sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"

3) To make sure it's installed correctly and added as the main shell check /etc/passwd file:
cat /etc/passwd

3a) If it's not there - set it as your default shell:
chsh -s $(which zsh)
more here: https://github.com/ohmyzsh/ohmyzsh/wiki/Installing-ZSH

cat - to display information form the file in the console
In the displayed info, right at the end, text to the user name (in my case next to 'karolina') should be usr/bin/zsh.

4) Change the theme:
- display the file in the shell by typing: nano ~/.zshrc
- change the theme ZSH_THEME="ys"
- save by clicking ^O (^ = Crtl)
- click Enter
- to change the shell without closing the terminal type: exec zsh

DONE!