make错误解决

安装使用tcpkit工具的时候，在make的时候报错

error: Neither flex nor lex was found.

解决方法：

yum install flex bison

tcpkit 是一个抓包工具
tcpkit 地址

tcpkit 支持redis，memcahed，http协议的抓包
简单用法如下：

the tcpkit was designed to make network packets programable with LUA by @git-hulk
   -h, Print the tcpkit version strings, print a usage message, and exit
   -i interface, Listen on network card interface
   -r file, Read packets from file (which was created with the -w option or by other tools that write pcap)
   -A Print each packet (minus its link level header) in ASCII.  Handy for capturing web pages
   -B buffer_size, Set the operating system capture buffer size to buffer_size, in units of KiB (1024 bytes)
   -s snaplen, Snarf snaplen bytes of data from each packet rather than the default of 1500 bytes
   -S file, Push packets to lua state if the script was specified
   -t threshold, Print the request lantecy which slower than the threshold, in units of Millisecond
   -w file, Write the raw packets to file
   -p protocol, Parse the packet if the protocol was specified (supports: redis, memcached, http, raw)
   -P stats port, Listen port to fetch the latency stats, default is 33333


For example:

   `tcpkit -i eth0 tcp port 6379 -p redis` was used to monitor the redis reqeust latency

   `tcpkit -i eth0 tcp port 6379 -p redis -w 6379.pcap` would also dump the packets to `6379.pcap`

   `tcpkit -i eth0 tcp port 6379 -p redis -t 10` would only print the request latency slower than 10ms