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wikipedia:lsof[1] list open files and network connections.

Basic commands[edit]

  • lsof /path/to/file or lsof /path/to/dir or lsof /dev/sdc1
  • lsof -t /path/to/file
-t terse output with process identifiers only and no header

Files related[edit]

List all open files by a specific process:

Network related[edit]

Open TCP ports:

Open UDP ports:

  • lsof -iUDP -P -n
  • macOS: sudo lsof -iTCP -sTCP:LISTEN -n -P

Related commands[edit]


  1. Read lsof questions on StackExchange:
  2. Review further examples in
  3. Read

See also[edit]

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