whiptail

Display text-based dialog boxes from shell scripts. More information: https://manned.org/whiptail.

• Display a simple message:
  whiptail --title "{{title}}" --msgbox "{{message}}" {{height_in_chars}} {{width_in_chars}}
• Display a boolean choice, returning the result through the exit code:
  whiptail --title "{{title}}" --yesno "{{message}}" {{height_in_chars}} {{width_in_chars}}
• Customise the text on the yes/no buttons:
  whiptail --title "{{title}}" --yes-button "{{text}}" --no-button "{{text}}" --yesno "{{message}}" {{height_in_chars}} {{width_in_chars}}
• Display a text input box:
  {{result_variable_name}}="$(whiptail --title "{{title}}" --inputbox "{{message}}" {{height_in_chars}} {{width_in_chars}} {{default_text}} 3>&1 1>&2 2>&3)"
• Display a password input box:
  {{result_variable_name}}="$(whiptail --title "{{title}}" --passwordbox "{{message}}" {{height_in_chars}} {{width_in_chars}} 3>&1 1>&2 2>&3)"
• Display a multiple-choice menu:
  {{result_variable_name}}=$(whiptail --title "{{title}}" --menu "{{message}}" {{height_in_chars}} {{width_in_chars}} {{menu_display_height}} "{{value_1}}" "{{display_text_1}}" "{{value_n}}" "{{display_text_n}}" ..... 3>&1 1>&2 2>&3)