如何为Linux用户管理Bash脚本添加选择管理菜单

下面是添加了交互式菜单的完整脚本，你可以直接使用：

#!/bin/bash

# Function to create users
create_users() {
    echo "Enter the full path of the user file:"
    read user_file

    # Check if the file exists
    if [ -f "$user_file" ]; then
        while IFS=, read -r username full_name password main_group work_dir; do
            # Create the user
            sudo useradd -m -p "$password" -g "$main_group" -d "$work_dir" "$username"

            # Create the user's personal directories
            sudo mkdir -p "$work_dir/documents" "$work_dir/images" "$work_dir/videos" "$work_dir/music"

            # Set appropriate permissions for the personal directories
            sudo chown -R "$username:$main_group" "$work_dir/documents" "$work_dir/images" "$work_dir/videos" "$work_dir/music"
            sudo chmod 700 "$work_dir/documents" "$work_dir/images" "$work_dir/videos" "$work_dir/music"
        done < "$user_file"
        echo "Users have been created successfully."
    else
        echo "The user file does not exist."
    fi
}

# Function to delete users
delete_users() {
    echo "Enter the full path of the user file:"
    read user_file

    # Check if the file exists
    if [ -f "$user_file" ]; then
        while IFS=, read -r username _ _ _ _; do
            # Delete the user
            sudo userdel -r "$username"
        done < "$user_file"
        echo "Users have been deleted successfully."
    else
        echo "The user file does not exist."
    fi
}

# Interactive main menu
show_menu() {
    clear
    echo "====================================="
    echo "批量用户管理工具"
    echo "====================================="
    echo "1. 批量创建用户"
    echo "2. 批量删除用户"
    echo "3. 退出"
    echo "====================================="
    read -p "请输入选项编号(1-3): " choice
}

# Main execution loop
while true; do
    show_menu
    case $choice in
        1)
            create_users
            read -p "操作完成，按任意键返回菜单..."
            ;;
        2)
            delete_users
            read -p "操作完成，按任意键返回菜单..."
            ;;
        3)
            echo "退出工具，再见！"
            exit 0
            ;;
        *)
            echo "无效选项，请输入1-3之间的数字"
            read -p "按任意键返回菜单..."
            ;;
    esac
done

关键修改说明 #

• 新增菜单函数show_menu：负责清屏并显示交互式选项列表，提示用户输入选择。
• 主循环逻辑：用while true实现菜单的循环显示，直到用户选择退出（选项3）。
• 选项分支处理：通过case语句匹配用户输入的选项，分别调用对应的create_users或delete_users函数，同时处理无效输入的提示。
• 优化原函数细节：
  • 创建目录时改用mkdir -p，避免目录已存在时报错
  • 修改chown为chown -R，递归设置权限更稳妥
  • 合并重复的权限设置命令，让代码更简洁

使用注意事项 #

• 运行脚本需要sudo权限，因为用户创建/删除操作属于系统级操作
• 用户文件必须是逗号分隔的格式，每行对应一个用户信息，格式为：username,full_name,password,main_group,work_dir
• 操作完成后会提示按任意键返回主菜单，方便连续执行多项任务

内容的提问来源于stack exchange，提问作者scifimonk