look for just one file

• Unix
  • /usr/bin/which
  • bash — type
• Windows
  • Windows Vista & Windows Server 2003 and later — where.exe
  • for older Windows versions, where.exe is available for download
  • for older versions, there are batch file scripts [1] [2] [3] that can do this

look for all matches

• Unix
  • bash — type -a
  • tcsh — where