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3.3.3.1 lsof

lsof lists open files and network connections. The following command shows open network connections for processes that contain the name Squeak. Since Pharo currently uses the Squeak VM, this should show Pharo sockets.

$ lsof -n -i -P | grep Squeak

Here are some examples, this creates a basic TCP socket.

socket := Socket newTCP
Squeak    15272 mike    9u  IPv4 0x66ac66c      0t0  TCP *:* (CLOSED)

This puts the socket into listening mode.

socket listenOn: 12345 backlogSize: 4
Squeak    15272 mike    9u  IPv4 0x66ac66c      0t0  TCP *:12345 (LISTEN)

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