Which network, socket and process checks (ss, file descriptors, lingering sockets, port bindings) help you compare healthy and broken pods?

Tests whether you'd compare ss -s for socket state counts, lsof/ls /proc/<pid>/fd for file descriptor exhaustion, and netstat/ss for lingering TIME_WAIT or CLOSE_WAIT connections between the two pods -- a side-by-side diff is often faster than theorizing about the cause.