Dear Maintainer, #lsof -p <pi> -T fqsw lsof: unsupported TCP/TPI info selection: w lsof 4.99.4 latest revision: https://github.com/lsof-org/lsof latest FAQ: https://github.com/lsof-org/lsof/blob/master/00FAQ latest (non-formatted) man page: https://github.com/lsof-org/lsof/blob/master/Lsof.8 usage: [-?abhHKlnNoOPRtUvVX] [+|-c c] [+|-d s] [+D D] [+|-E] [+|-e s] [+|-f[gG]] [-F [f]] [-g [s]] [-i [i]] [+|-L [l]] [+m [m]] [+|-M] [-o [o]] [-p s] [+|-r [t]] [-s [p:s]] [-S [t]] [-T [t]] [-u s] [+|-w] [-x [fl]] [--] [names] Use the ``-h'' option to get more help information. According to the manpage, "w" should yield window information of an TCP socket. Thanks for your work and greetings Hermann