linux上面，如果替换文件中的内容，其实还是比较方便的。比如：sed -i 's/xxx/yyy/g' xxx.txt
然而同样的命令，如果放到mac下面，就会报：sed: 1: "xxx.txt": invalid command code o
到stackoverflow.com就会发现已经有人回复了：https://stackoverflow.com/questions/19456518/invalid-command-code-despite-escaping-periods-using-sed
XML/HTML代码
- If you are on a OS X, this probably has nothing to do with the sed command. On the OSX version of sed, the -i option expects an extension argument so your command is actually parsed as the extension argument and the file path is interpreted as the command code.
- Try adding the -e argument explicitly and giving '' as argument to -i:
- find ./ -type f -exec sed -i '' -e "s/192.168.20.1/new.domain.com/" {} \;
- See this.
参考：
1、https://stackoverflow.com/questions/19456518/invalid-command-code-despite-escaping-periods-using-sed
2、https://stackoverflow.com/questions/7573368/in-place-edits-with-sed-on-os-x