三剑客-sed

【sed命令】

 

sed  's~\(include http_cc.*\)~#\1~' /usr/local/nginx/conf/http_facadehost/default.conf    只打印

sed  -i  's~\(include http_cc.*\)~#\1~' /usr/local/nginx/conf/http_facadehost/default.conf

 

#追加

sed -i '$a\10.32.61.79 sbapi.opm11.com' /etc/hosts  

 

#清空空格行

sed -i '/^ *$/d' /etc/hosts  

 

 

子串匹配标记\1

匹配给定样式的其中一部分：

 

echo this is digit 7 in a number | sed 's/digit \([0-9]\)/\1/'

this is 7 in a number