1、将当前目录下包含jack串的文件中，jack字符串替换为tom

sed -i "s/jack/tom/g" `grep "jack" -rl ./`

2、将某个文件中的jack字符串替换为tom

sed -i "s/jack/tom/g" test.txt

３、不检索某个文件

sed -i "s/jack/tom/g" `grep "jack" -rl --exclude="replacenameofpackage" ./`