shell读取文本内容进行替换再写会文本

#1bin.bash
filename="/home/song/my.txt"
while read line
do
echo $line | grep -w  "nice" | sed -e   ‘s/nice//g‘ -e ‘s/hello/no/g‘>mynew.txt
done < $filename

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原文：http://2309998.blog.51cto.com/2299998/1358283