$ find ./ -name *.m:g#sourceString#s##targetString#g格式: sed "s/查找字段/替换字段/g"
$ sed -i "" "s/sourceString/targetString/g" test.m-i: 直接修改原文
#bin/sh
target_files=`find ./ -name *.m`
for target_file in ${target_files}
do
echo ${target_file}
sed -i "" "s/sourceString/targetString/g" ${target_file}
done