powershell-basic

PowerShell Basics

Perform Windows system operations via PowerShell.

Use Cases

Need to obtain Windows system information (disk, memory, processes)
Need batch file operations
Need to manage system services or processes
Called internally by other Skills

Command Reference

System Information

# 系统概览
Get-ComputerInfo | Select-Object OsName, OsVersion, CsTotalPhysicalMemory

Disk Space

Get-PSDrive -PSProvider FileSystem | Select-Object Name, @{N='Free(GB)';E={[math]::Round($.Free/1GB,1)}}, @{N='Used(GB)';E={[math]::Round($.Used/1GB,1)}}

Memory Usage

Get-Process | Sort-Object WorkingSet64 -Descending | Select-Object -First 10 Name, @{N='Memory(MB)';E={[math]::Round($_.WorkingSet64/1MB,1)}}

Battery Status

Get-WmiObject Win32_Battery | Select-Object EstimatedChargeRemaining, BatteryStatus

Wi-Fi Information

netsh wlan show interfaces | Select-String "SSID|Signal"


### 文件操作

```powershell
# 搜索文件
Get-ChildItem -Path "$env:USERPROFILE\Documents" -Recurse -Filter "*.pdf" | Select-Object Name, FullName, Length, LastWriteTime

# 按大小排序
Get-ChildItem -Path . -Recurse -File | Sort-Object Length -Descending | Select-Object -First 20 Name, @{N='Size(MB)';E={[math]::Round($_.Length/1MB,2)}}, FullName

# 最近修改的文件
Get-ChildItem -Path "$env:USERPROFILE" -Recurse -File | Where-Object { $_.LastWriteTime -gt (Get-Date).AddDays(-7) } | Sort-Object LastWriteTime -Descending | Select-Object -First 20

# 批量重命名
Get-ChildItem -Path . -Filter "*.txt" | Rename-Item -NewName { $_.Name -replace '旧名', '新名' }

Process Management

# 列出进程
Get-Process | Sort-Object CPU -Descending | Select-Object -First 15 Name, Id, CPU, @{N='Memory(MB)';E={[math]::Round($_.WorkingSet64/1MB,1)}}

# 查找进程
Get-Process -Name "*chrome*"

# 已安装应用
Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* | Select-Object DisplayName, DisplayVersion, Publisher | Sort-Object DisplayName

Network

# 测试连通性
Test-NetConnection -ComputerName google.com -Port 443

# 公网 IP
(Invoke-WebRequest -Uri "https://api.ipify.org" -UseBasicParsing).Content

Security Rules

Do not execute administrator commands: Do not use Run as Administrator
Do not modify the registry: Do not operate on system registries such as HKLM
Do not operate on system services: Do not Start/Stop system services
Deletion operations must be confirmed by HITL