http://blog.csdn.net/lizhi200404520/article/details/7968483
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
http://blog.csdn.net/lizhi200404520/article/details/7968483
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
