Which Files Are Open By A Given Process? (lsof, Cont.)

• Note that the lsof command is usually located in the "/usr/sbin" Directory - which is not found in the User's PATH, so we needed to invoke it as /usr/sbin/fuser.
• Types of Files held open by processes:
  • cwd - Current Working Directory.
  • rtd - Root Directory.
  • txt - Binary File (the program that this Process executes).
  • mem - Memory-Mapped Files - often libraries used by the program.
  • 0 - The File/terminal from which the process reads "user" input.
  • 1 - The File/terminal into which the process writes "user" output.
  • 2 - The File/terminal into which the process writes error messages.
  • <number> - A regular File.

Originally written by guy keren