Standalone fish installation

Install/Templates/fish_prompt.fish

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+function fish_prompt
+	if not set -q VIRTUAL_ENV_DISABLE_PROMPT
+        set -g VIRTUAL_ENV_DISABLE_PROMPT true
+    end
+    set_color yellow
+    printf '%s' (whoami)
+    set_color normal
+    printf '@'
+
+    set_color red
+    echo -n jupyter-raspberry-pi3
+    set_color normal
+    printf ':'
+
+    set_color $fish_color_cwd
+    printf '%s' (prompt_pwd)
+    set_color normal
+
+    # Line 2
+    echo
+    if test $VIRTUAL_ENV
+        printf "(%s) " (set_color blue)(basename $VIRTUAL_ENV)(set_color normal)
+    end
+    printf '> '
+    set_color normal
+end

Install/fish-install

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+#!/bin/bash
+
+# Install customized fish
+
+sudo apt install fish
+mkdir -p /home/jovian/.config/fish/functions
+cp ./Templates/fish_prompt.fish /home/jovian/.config/fish/functions/
+sudo chsh -s /usr/bin/fish
+