安装libpcap出现：
1：error: Your operating system's lex is insufficient to
compile
libpcap. ex is a lex replacement that has many
advantages, including
being able to compile libpcap.
需要更新lex
执行命令:sudo apt-get install flex
2：出现错误
yacc -d grammar.y
make: yacc：命令未找到
make: *** [grammar.c] 错误 127
需要安装yacc
inux下是用flex和bison来分别代替lex和yacc的，安装直接使用命令：
sudo apt-get install bison
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安装libnet：
1：error: C++ preprocessor "/lib/cpp" fails sanity check
安装 g++ 编译器 （一款linux、unix等操作系统下的C++编译器
使用命令：sudo apt-get install g++
可能出现libnet的版本不符合要求
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安装libnids：
1：checking for GLIB... configure: error: Package requirements
(glib-2.0 >= 2.2.0) were not met.
直接安装命令：sudo apt-get install "libglib2.0-dev"
编译程序是发生错误：
undefined reference to `pcap_parse'
不知道是什么原因说没有安装libpcap.
安装到最后才发现，原来ubuntu里提供了这三个包，只要运行下面三个命令即可了！（悲剧的人阿！）
原来是自己没有安装开发包，
sudo apt-get install libpcap-dev
sudo apt-get install libnids-dev
sudo apt-get install libnet1-dev
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