Top 5 Obvious but little known useful cmdlets and IT support tricks

As an IT technician, I am often adding new quick tricks to my mental shorcuts list, here are my current top 5:

1. Need to log onto a domain as the local PC admin but don’t know the PC name?
   Simply use ” .\” at the start of the admin username to log on as a local PC user.
2. Powershell if PC has trust relationship
   Test-ComputerSecureChannel –Server *dc name* -Verbose
3.  shutdown /i (-i ) remote shutdown
4. Create big dummy file:
   Cd \sysinternalssuite
   Contig -n 2gbEmptyFile.txt 20000000
5. For Spooler Crashes, first try below to clear all jobs
   net stop spooler
   pause
   del /S /F “C:\Windows\System32\spool\PRINTERS\*”
   net start spooler
   pause

::end