so_keepalive=5s:2:2;

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1、docker inspect dc
2、find / -name nginx
3、cd /var/lib/docker/overlay2/2929841208da65cc60b29c1c9237bd717c931de595a680498316b4b431f1bfed/merged/etc/nginx
4、ls
5、cat nginx.conf
6、vi nginx.conf
7、listen 1935 so_keepalive=5s:2:2;
8、docker restart ced