bash shell 连接socket exec 8(写)方式，打开127.0.0.1的tcp11211端口 ls -l /proc/self/fd                                   #查看打开的连接8 echo -e "stats" >&8                             #向socket写入数据 cat <&8                                                  #从socket读入数据 exec 8<&-                                              #关闭socket读 exec 8>&-                                              #关闭socket写 参考：## [Shell 脚本实现TCP/UDP协议通讯](https://www.cnblogs.com/occult/archive/2012/12/25/2832183.html)