我的好友可以完全访问我的Ubuntu 16.04计算机来托管他的网站，并且并不了解太多。他进入文件夹并去更改文件权限，但是却跑了
chmod -R /
到775或755，他不记得了，我无法远程进入服务器进行检查。
It appears to be offline as i can't remote SSH, websites are down, like it appears to be completely offline but it isnt. I tried to login physically to it on root only to receive incorrect login when entering the username root without it even asking for a password. THOUGH the account that the command was executed form can be logged into and has sudo access.
我没有可行的备份，因此，如果有人可以帮忙，那就太好了！ <3