Linux Basic — Full CLI Menu

Full CLI Menu

This page shows a complete, modular menu structure suitable for small admin tools. It uses select for the main choices and functions for each action.

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Example Structure

#!/usr/bin/env bash
set -euo pipefail

RED="\e[31m"; GREEN="\e[32m"; RESET="\e[0m"

main_menu() {
  PS3="Choose: "
  select opt in "Start" "Stop" "Status" "Config" "Quit"; do
    case "$REPLY" in
      1) start_service;;
      2) stop_service;;
      3) status_service;;
      4) config_menu;;
      5) echo "Bye"; exit 0;;
      *) echo "invalid";;
    esac
  done
}

start_service() { echo -e "${GREEN}Starting...${RESET}"; }
stop_service()  { echo -e "${RED}Stopping...${RESET}"; }
status_service(){ echo "All good"; }
config_menu()   { echo "Config submenu"; }

trap 'echo; echo "exiting"; exit' INT
main_menu

Break actions into functions for testability and unit-like modularity.

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Next → Sub-Menus