Hidden CMD Commands Every System Admin Should Know!

Most sysadmins know the basics, but these hidden CMD commands can save time, improve security, and troubleshoot faster! 🚀

Secret System Info & Performance Checks

Find Windows installation date:
```
wmic os get installdate
```

Get detailed boot time analysis:

wmic path Win32_OperatingSystem get LastBootUpTime

Check CPU thermal condition:

wmic /namespace:\root\wmi path MSAcpi_ThermalZoneTemperature get CurrentTemperature

List all connected USB devices:

wmic path Win32_USBControllerDevice get Dependent

Advanced Security & Access Control

Detect unauthorized remote logins (RDP sessions):
```
quser
```

Check failed login attempts in Event Viewer:

wevtutil qe Security /c:10 /f:text /q:"*[System[(EventID=4625)]]"

See who is using a file:
```
openfiles /query /v
```
List all running tasks with system permissions:
```
tasklist /V | findstr /I "SYSTEM"
```

Hidden Network & Connectivity Commands

Show detailed Wi-Fi network info:
```
netsh wlan show interfaces
```

Reveal saved Wi-Fi passwords:

netsh wlan show profile name="WiFi-Name" key=clear

Check which apps are using the internet:
```
netstat -b -o
```
Force refresh all DNS records:
```
ipconfig /registerdns
```
Check if a port is open on a remote server:
```
telnet IP PORT
```

Deep Windows OS & File System Tweaks

List all installed software:
```
wmic product get name,version
```

Find and delete duplicate files:

for /r %SystemDrive% %i in (<em>.</em>) do @echo %~ni | findstr /L /C:"%~ni" && del "%~fi"

Check which processes have locked a file:
```
handle.exe filename
```
Delete all temporary files instantly:
```
del /s /q %temp%*
```

Ultimate Remote Management Hacks

Enable remote desktop via CMD:

reg add "HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 0 /f

Restart a PC remotely:
```
shutdown /r /m \RemotePC /t 0
```

Check who is logged in on a remote PC:

wmic /node:RemotePCName computersystem get username

Launch Task Manager on a remote PC:
```
taskmgr /s RemotePCName
```

You Should Know:

Linux Alternative for Checking CPU Temperature:
```
sensors
```
Linux Command to List USB Devices:
```
lsusb
```
Linux Command to Check Open Ports:
```
netstat -tuln
```
Linux Command to Delete Temporary Files:
```
rm -rf /tmp/*
```
Linux Command to List Installed Software:
```
dpkg --list
```

What Undercode Say:

These CMD commands are essential for system administrators to manage, troubleshoot, and secure Windows systems efficiently. Whether you’re checking system performance, managing network connections, or handling remote systems, these commands provide powerful tools to streamline your workflow. For Linux users, similar functionalities can be achieved using the provided commands. Mastering these commands will significantly enhance your IT administration skills and improve system security.