Do you want authentication tokens to be time-based (y/n) y #验证二维码，在浏览器打开使用谷歌验证器APP扫描添加即可。 https://www.google.com/chart?chs=200x200xxx Your new secret key is: WKDPJHOKR2P3DOWL Your verification code is 189192 #临时验证码，手机不在身边可以使用，不过一个码只能用一次 Your emergency scratch codes are: 77678926 14729443 83656478 55669982 23960253
#下面可以直接照着填，或者自己使用谷歌翻译，然后自行选择 Do you want me to update your "/root/.google_authenticator" file (y/n) y
Do you want to disallow multiple uses of the same authentication token? This restricts you to one login about every 30s, but it increases your chances to notice or even prevent man-in-the-middle attacks (y/n) y
By default, tokens are good for 30 seconds and in order to compensate for possible time-skew between the client and the server, we allow an extra token before and after the current time. If you experience problems with poor time synchronization, you can increase the window from its default size of 1:30min to about 4min. Do you want to do so (y/n) y
If the computer that you are logging into isn't hardened against brute-force login attempts, you can enable rate-limiting for the authentication module. By default, this limits attackers to no more than 3 login attempts every 30s. Do you want to enable rate-limiting (y/n) y
