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PowerShell 7 下载安装与上手使用详解(2026)

  • 2026-10-24 16:18:08
PowerShell 7 下载安装与上手使用详解(2026)

PowerShell 7 是做什么的

PowerShell 是微软推出的命令行脚本工具,可以看作是 Windows 自带“命令提示符”(cmd)的升级版,功能要强得多。它既能敲命令管理系统,又能写脚本做自动化,很多系统管理员、运维人员和开发者都用它批量处理任务。它的主要特点包括:内置上千个命令(cmdlet),覆盖文件、网络、系统、服务等方方面面;支持管道操作,一个命令的输出可以直接传给下一个命令,组合出复杂操作;跨平台支持 Windows、macOS、Linux,脚本写一次多平台运行。目前 PowerShell 的最新版本是 7.6.5,PowerShell 7 和系统自带的 5.1 可以共存,装了 7 不影响原来的。

PowerShell 7 安装包下载方式

PowerShell 7 安装包下载:PowerShell7(源自 Github,Windows+Linux+maxOS) 夸克网盘下载:https://pan.quark.cn/s/22acca411998

PowerShell 7 在 Windows 上的安装步骤

1)双击 .msi 文件启动安装程序,点击 Next:

2)进入安装路径选择界面。建议保持默认路径,也可以安装到非系统盘(如 D 盘):

3)一定要勾选“Add PowerShell to PATH environment variable”,这样才能在任何命令行窗口中直接使用 pwsh 命令启动,其它保持默认即可:

4)继续点击“Next”和“Install”,等待安装完成。完成后点击“Finish”退出安装程序,在开始菜单里找到“PowerShell 7 (x64)”即可启动。

PowerShell 7 在 Linux 上的安装步骤(以 Ubuntu 为例)

Linux 上安装 PowerShell 推荐使用包管理器,以 Ubuntu(Debian 系列)为例,打开终端依次执行以下命令:

# 更新包列表 sudo apt-get update  # 安装必备依赖 sudo apt-get install -y wget apt-transport-https software-properties-common  # 获取 Ubuntu 版本号 source /etc/os-release  # 下载并注册微软软件源 wget -q https://packages.microsoft.com/config/ubuntu/ 开头,支持字符串、数字、数组等$name = "小明"管道操作用 | 将命令输出传给下一个命令继续处理Get-Process | Where-Object CPU -gt 10条件判断与循环if/else 分支判断,foreach/for 批量处理if ($age -gt 18) { ... }函数定义用 function 封装可复用的代码块function SayHello { ... }文件与系统操作读写文件、管理进程和服务Get-Content、Set-Service错误处理用 try/catch 捕获异常,防止脚本崩溃try { ... } catch { ... }

以上是编写 PowerShell 脚本的核心知识体系。掌握这些内容后,你就可以根据自己的需求编写自动化脚本了。另外,写脚本时建议用 VS Code、Sublime Text 而不是记事本,语法高亮和调试功能能帮你省不少时间。

PowerShell 7 新手注意事项

1)电脑上同时存在两个 PowerShell:系统自带的 5.1 和新装的 7。日常使用建议用 7,功能更全;如果运行的是依赖 5.1 的老脚本,就用系统自带版本打开。

2)需要修改系统设置、安装服务等操作时,右键开始菜单选择“终端(管理员)”打开,普通窗口没有管理员权限,命令会报“拒绝访问”。

3)PowerShell 命令不区分大小写,Get-Process 和 get-process 一样;命令名记不住可以输入 Get-Command 查看全部内置命令。

4)PowerShell 权限很大,删除类命令(Remove-Item)执行前一定看清路径,重要文件先备份,避免误删。

常见问题

问:PowerShell 7 和系统自带的 PowerShell 5.1 有什么区别?

答:PowerShell 7 是跨平台版本,功能更全,日常使用建议用 7;系统自带的 5.1 是旧版本,仅限 Windows,适合跑依赖 5.1 的老脚本。

问:在 PowerShell 7 中运行脚本时报错“拒绝访问”怎么办?

答:普通窗口没有管理员权限,需要右键开始菜单选择“终端(管理员)”打开,再执行命令。

问:PowerShell 的命令大小写敏感吗?

答:不敏感,Get-Process 和 get-process 效果一样;命令名记不住可以输入 Get-Command 查看全部内置命令。


PowerShell 是微软官方的命令行脚本工具,功能比系统自带的 cmd 强很多,查文件、管进程、看系统信息都能用命令搞定,还能写脚本批量自动化。新手上手先敲几条查看命令(Get-Process、Get-ChildItem),再试试管道组合,配合 Get-Help 看帮助,很快就能自己写脚本了。

基本 文件 流程 错误 SQL 调试
  1. 请求信息 : 2026-10-24 18:49:18 HTTP/1.1 GET : http://yeyulingfeng.com/a/497153.html
  2. 运行时间 : 0.078596s [ 吞吐率:12.72req/s ] 内存消耗:4,391.84kb 文件加载:140
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=5fcb1721e00002b9ee41b74271eae8a6
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  1. CONNECT:[ UseTime:0.000533s ] mysql:host=172.18.0.4;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000947s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000427s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000370s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000569s ]
  6. SELECT * FROM `set` [ RunTime:0.000313s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000687s ]
  8. SELECT * FROM `article` WHERE `id` = 497153 LIMIT 1 [ RunTime:0.000349s ]
  9. UPDATE `article` SET `lasttime` = 1792838958 WHERE `id` = 497153 [ RunTime:0.001341s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000321s ]
  11. SELECT * FROM `article` WHERE `id` < 497153 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000454s ]
  12. SELECT * FROM `article` WHERE `id` > 497153 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000348s ]
  13. SELECT * FROM `article` WHERE `id` < 497153 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000584s ]
  14. SELECT * FROM `article` WHERE `id` < 497153 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000545s ]
  15. SELECT * FROM `article` WHERE `id` < 497153 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000669s ]
0.088026s