networking - what is the ss -xa output unix socket number mean -


run ss -xa output [root@qm-hd2b-php_api_v3-1_31 ~]# ss -x netid state recv-q send-q local address:port peer address:port
u_str estab 0 0 * -2097117846 * 0
u_str estab 0 0 /dev/shm/redis_storage_read.sock -1667538566 u_str estab 0 0 * 11034 * 0 u_str estab 0 0 * 910428439 * 0
u_str estab 0 0 /var/run/salt/minion/minion_event_81efd4fc71_pub.ipc 910428616 * 0 "-2097117846 -1667538566 910428439 910428616" mean? why has negative sign in port , "local address" "*"?


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