Many people mistakenly think that shell scripts can only be run in command line. In fact shell can also call some GUI components such as menus,alert dialogs, progress bar etc. You can control the final output, cursor position and various output effects. Here we introduce some tools which can help you create powerful, interactive and user friendly Unix/Linux shell scripts.1. notify-sendThis command can let you inform the process to send a desktop notification to users. This can be used to send prompt to users or display some information to users. You can download it :$ sudo apt-get install libn...