review what i studied `date` - 2017-4-6
2017-04-06 19:07
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#vim 内部命令: :g/abc/d #删除所有有abc的行 example: :g/^#/d #删除所有以#号开头的行 :g/^$/d #删除所有空行
:v/abc/d #删除所有没有abc的行
tcpdump -i ens160 port 161 #监听网卡ens160的161端口 tcpdump - ens160 tcp port 161 #只监听网卡ens160上的tcp数据流
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