test 文件
hgghhvg
hgvhjgh
hhhjh
jjjhvvg
hhhhjh
haha
haha
haha
hghh
hvhjjjj
将haha替换为hello
$ sed ‘s/haha/hello/g‘ test hgghhvg hgvhjgh hhhjh jjjhvvg hhhhjh hello hello hello hghh hvhjjjj $ cat test hgghhvg hgvhjgh hhhjh jjjhvvg hhhhjh haha haha haha hghh hvhjjjj
原文：https://www.cnblogs.com/sea-stream/p/11271776.html