The name of the file where radiusd will write its process ID (PID) at start-up. Defaults to %L/radiusd.pid on Unix and Windows. The file name can include special path name characters as defined in Section 3.3. Special formatters. If the directory containing the file does not exist, it will attempt to create the directory first.

If PidFile is defined in configuration with no value, no file is written.

# So we do not conflict with another radiusd
PidFile /tmp/radiusd2.pid