怎么请求的时候老是有个 PID 6990 的CURL进程？是在偷懒吗？
~ $ ps -a
PID TTY TIME CMD
6990 pts/29 00:00:00 curl
11854 pts/29 00:00:00 curl
12448 pts/29 00:00:00 curl
12449 pts/29 00:00:00 curl
12450 pts/29 00:00:00 curl
12451 pts/29 00:00:00 curl
12452 pts/29 00:00:00 curl
12453 pts/29 00:00:00 curl
12454 pts/29 00:00:00 curl
12455 pts/29 00:00:00 curl
12457 pts/29 00:00:00 curl
12458 pts/29 00:00:00 curl
12459 pts/29 00:00:00 curl
12460 pts/29 00:00:00 curl
12465 pts/29 00:00:00 curl
12481 pts/28 00:00:00 ps
