向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除|赢在IT，Playin' with IT,Focus on Killer Application,Marketing Meets Technology.

零、一段监听端口的shell：
## 数据库服务器 #!/bin/bash echo "************************************************************" echo "检查实例端口是否可用(db2 5000,ldap 1389,mq 8161 )" # ================================================================ Name=db2inst1 port=50000 TCPListeningnum=`netstat -an | grep ":$port " | awk '$1 == "tcp" && $NF == "LISTEN" {print $0}' | wc -l` if [ $TCPListeningnum = 1 ] then {     echo "The port is listening"    echo "实例$Name 端口$port 正在监听。" } else {     echo "The port is not listening" } fi
摘自：http://ajiewps.sinaapp.com/?p=266

一、通过shell脚本重定向实现监控memcache状态:
[root@localhost ~]# (echo "stats";sleep 1)|telnet 192.168.109.7 14000 Trying 192.168.109.7... Connected to 192.168.109.7 (192.168.109.7). Escape character is '^]'. STAT pid 3372 STAT uptime 29477758 STAT time 1395064830 STAT version 1.2.0 STAT pointer_size 64 STAT rusage_user 9248.579002 STAT rusage_system 18623.580785 STAT curr_items 840979 STAT total_items 90346764 STAT bytes 183561732 STAT curr_connections 6 STAT total_connections 118612263 STAT connection_structures 31 STAT cmd_get 439611216 STAT cmd_set 90330156 STAT get_hits 349769370 STAT get_misses 89841846 STAT bytes_read 28924307933 STAT bytes_written 787589785666 STAT limit_maxbytes 10737418240 END
通过nc命令实现：
[chengmo@centos5 shell]$ (echo "stats")|nc 127.0.0.1 11211
二、通过重定向读取远程web服务器头信息：
(echo -e "HEAD / HTTP/1.1\n\n\n\n\n";sleep 2)|telnet www.baidu.com 80

参考：http://www.cnblogs.com/chengmo/archive/2010/10/22/1858302.html

作者：jackxiang@向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除
地址：https://jackxiang.com/post/7098/
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