$(echo -en "PINGrn SET runoobkey redisrnGET runoobkeyrnINCR visitorrnINCR visitorrnINCR visitorrn"; sleep 10) | nc localhost 6379
(echo -en "PINGrn SET runoobkey redisrnGET runoobkeyrnINCR visitorrnINCR visitorrnINCR visitorrn"; sleep 10) | nc localhost 6379
怎么都运行报错,复制的一模一样的啊