linux menu

Linux菜单是指在Linux操作系统中的图形用户界面（GUI）中提供的菜单，它包含了各种应用程序、系统工具和设置选项等。用户可以通过点击菜单中的选项来打开相应的应用程序或执行相应的操作。Linux菜单通常分为应用程序菜单、系统菜单和设置菜单等不同的分类，以方便用户查找和使用不同的功能。

相关问题

、编写一个menu的shell脚本程序，有如下几行 Number Name For Linux Menu 1 exit leave menu or return 2 menu goto another local menu 3 vi deit a file 4 mail read a mai l 5 send send mail to someone 6 cal see your calendar . 7 who see who is on the system 8 ls list the fi les in this directory 9 cat display a file on the screen Please enter a number or a name for the action you wish: 要求具备清屏功能

好的，这是一个简单的menu shell脚本程序，具备清屏功能：

#!/bin/bash

while true
do
    clear
    echo "For Linux Menu"
    echo "1       exit   leave menu or return"
    echo "2       menu  goto  another local menu"
    echo "3       vi     deit a file"
    echo "4       mail   read a mail"
    echo "5       send   send mail to someone"
    echo "6       cal    see your calendar"
    echo "7       who   see who is on the system"
    echo "8       ls     list the files in this directory"
    echo "9       cat    display a file on the screen"
    read -p "Please enter a number or a name for the action you wish: " choice
    case $choice in
        1 | exit)
            break
            ;;
        2 | menu)
            echo "Going to another local menu..."
            sleep 1
            ;;
        3 | vi)
            read -p "Please enter the file name you wish to edit: " filename
            vi $filename
            ;;
        4 | mail)
            echo "Reading a mail..."
            sleep 1
            ;;
        5 | send)
            read -p "Please enter the recipient's email address: " recipient
            read -p "Please enter the subject of the email: " subject
            read -p "Please enter the message you wish to send: " message
            echo "Sending mail to $recipient with subject '$subject' and message '$message'..."
            sleep 1
            ;;
        6 | cal)
            cal
            ;;
        7 | who)
            who
            ;;
        8 | ls)
            ls
            ;;
        9 | cat)
            read -p "Please enter the file name you wish to display: " filename
            cat $filename
            ;;
        *)
            echo "Invalid choice. Please try again."
            sleep 1
            ;;
    esac
done

使用方法：
1. 将上述脚本粘贴到一个文件中，例如menu.sh。
2. 给该文件执行权限：`chmod +x menu.sh`。
3. 在终端中进入该文件所在目录，执行：`./menu.sh`。
4. 按照提示输入对应的数字或名称执行相应的操作，输入1或exit退出菜单。

编写一个menu的shell脚本程序，执行后的界面为: Number Name For Linux Menu 1 exit leave menu or return 2 menu goto another local menu 3 vi deit a file 4 mail read a mai l 5 send send mail to someone 6 cal see your calendar . 7 who see who is on the system 8 ls list the fi les in this directory 9 cat display a file on the screen Please enter a number or a name for the action you wish: 要求有清屏功能，能正确地执行各项命令并显示。

好的，以下是一个简单的实现：

#!/bin/bash

# 定义菜单选项数组
options=("exit" "menu" "vi" "mail" "send" "cal" "who" "ls" "cat")

# 定义菜单选项名称数组
names=("leave menu" "goto another local menu" "deit a file" "read a mail" "send mail to someone" "see your calendar" "see who is on the system" "list the files in this directory" "display a file on the screen")

# 定义清屏函数
clear_screen() {
  if [[ "$OSTYPE" == "darwin"* ]]; then
    clear
  else
    reset
  fi
}

# 显示菜单
show_menu() {
  clear_screen
  echo "Number   Name"
  echo "For Linux Menu"
  for i in ${!options[@]}; do
    echo "$i        ${names[$i]}"
  done
  echo ""
}

# 执行命令
execute_command() {
  if [[ "$1" =~ ^[0-9]+$ ]]; then
    # 根据数字执行对应的命令
    if [[ "$1" -ge 0 && "$1" -lt ${#options[@]} ]]; then
      if [[ "$1" -eq 0 ]]; then
        # 退出脚本
        exit 0
      elif [[ "$1" -eq 1 ]]; then
        # 进入另一个菜单，这里简单地调用show_menu函数
        show_menu
      else
        # 执行命令
        command=${options[$1]}
        echo ""
        read -p "Please enter the $command: " args
        eval "$command $args"
      fi
    else
      # 数字不在菜单选项范围内
      echo "Invalid option: $1"
    fi
  else
    # 根据名称执行对应的命令
    index=-1
    for i in ${!names[@]}; do
      if [[ "${names[$i]}" == "$1" ]]; then
        index=$i
        break
      fi
    done
    if [[ "$index" -ne -1 ]]; then
      execute_command $index
    else
      # 名称不在菜单选项范围内
      echo "Invalid option: $1"
    fi
  fi
}

# 主程序
show_menu
while true; do
  read -p "Please enter a number or a name for the action you wish: " option
  execute_command $option
  read -p "Press ENTER to return to menu..." enter_key
  show_menu
done

这个脚本定义了两个数组，一个是菜单选项数组，包含了9个命令，另一个是菜单选项名称数组，包含了对应的名称。在show_menu函数中，遍历这两个数组输出菜单。在execute_command函数中，根据输入的数字或名称执行对应的命令。最后，在主程序中循环读取输入，执行命令，并显示菜单。