After install Fish shell， then install Oh My Fish .
Oh My Fish(shortly OMF) can make our Fish shell beautiful and elegant. It is a Fishshell framework that allows you to install packages which extend or modify the look and feel of your shell. It is easy to use, fast and extensible. Using omf, you can easily install themes that enriches the look of your shell and install plugins to tweak your fish shell as per your wish.
curl -L https://get.oh-my.fish | fish
Install Weather plugin to show the weather of your city
In Ubuntu we use below command to install jq
sudo apt install jq
To see weather in GuangZhou ,we should use command like below:
Weather GuangZhou
Refer Link：
https://www.ostechnix.com/install-fish-friendly-interactive-shell-linux/
https://www.ostechnix.com/oh-fish-make-shell-beautiful/
https://opensourceforu.com/2018/01/using-jq-consume-json-shell/