Ubuntu how to

• Set up "Command Prompt Here" functionality:
  Install sudo apt-get install nautilus-open-terminal
  Activate killall nautilus
• Combine multiple PDFs:
  Install sudo apt-get install gs pdftk
  Use gs -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=combinedpdf.pdf -dBATCH 1.pdf 2.pdf 3.pdf

Windows how to

• Remove shortcut arrows from desktop icons:
  Enter into the registry
  
  Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\explorer\Shell Icons]
"29"="%SystemRoot%\\Blank.ico,0"
• Edit group or security policies:
  Run secpol.msc or gpedit.msc
• Enable custom logon screen in Windows 7:
  Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background]
"OEMBackground"=dword:00000001