How can I use these red and green arrow signs in the bash prompt?

update 1

This is my .bashrc file

if [ "$color_prompt" = yes ]; then
PS1='$debian_chroot:+($debian_chroot)[33[01;32m][33[00m] 
[33[01;34m]→ w[33[00m]$ '
else
PS1='$debian_chroot:+($debian_chroot)→ w$ '
fi
unset color_prompt force_color_prompt

I want this arrow to be colored as @dessert answered before
(turn red and green for false and true command )

You can use bash’s PROMPT_COMMAND to run a function which builds your prompt, e.g.:

PROMPT_COMMAND=build_prompt

build_prompt() 
 EXIT=$? # save exit code of last command
 red='[e[0;31m]' # colors
 green='[e[0;32m]'
 cyan='[e[1;36m]'
 reset='[e[0m]'
 PS1='$debian_chroot:+($debian_chroot)' # begin prompt

 if [ $EXIT != 0 ]; then # add arrow color dependent on exit code
 PS1+="$red"
 else
 PS1+="$green"
 fi

 PS1+="→$reset $cyanw$reset \$ " # construct rest of prompt

Add this code to your ~/.bashrc file and open a new terminal or run . ~/.bashrc in an existing one for the changes to take effect. Note that I added the usual $ at the end, this prints $ normally and # if you’re root, thus preventing you from running commands as root unwittingly. The false command is a good way to test the non-zero exit code variant:

If you’re into prompt themeing you should definitely take a look at the zsh shell (package zsh), whose famous configuration framework Oh My Zsh alone comes with over hundred themes. Additionally there are many other plugins available, for example the Spaceship ZSH prompt.

Links

• How can I shorten my command line (bash) prompt?


• Bash Prompt with Last Exit Code


• Easy Bash PS1 Generator


• Bash tips: Colors and formatting


• What color codes can I use in my PS1 prompt?


• What does "$debian_chroot:+($debian_chroot)" do in my terminal prompt?