`sudo tail -f /var/log/auth.log`是什么意思？

问题描述：

我在frontendmaster上学习前端工程师全栈课程。`sudo tail -f /var/log/auth.log`是什么意思？

我使用数字海洋服务器。通过设置PermitRootLogin no并加入我的公钥对authorized_key文件，这样我就可以登录我残疾的root访问权限

然后： sudo tail -f /var/log/auth.log

Oct 7 08:42:17 ubuntu-512mb-sgp1-01-fem-young sshd[16857]: Invalid user user from 74.208.145.162 
Oct 7 08:42:17 ubuntu-512mb-sgp1-01-fem-young sshd[16857]: input_userauth_request: invalid user user [preauth] 
Oct 7 08:42:17 ubuntu-512mb-sgp1-01-fem-young sshd[16857]: Connection closed by 74.208.145.162 port 58905 [preauth] 
Oct 7 08:42:23 ubuntu-512mb-sgp1-01-fem-young sshd[16859]: Invalid user ubnt from 74.208.145.162 
Oct 7 08:42:23 ubuntu-512mb-sgp1-01-fem-young sshd[16859]: input_userauth_request: invalid user ubnt [preauth] 
Oct 7 08:42:23 ubuntu-512mb-sgp1-01-fem-young sshd[16859]: Connection closed by 74.208.145.162 port 59157 [preauth] 
Oct 7 08:42:26 ubuntu-512mb-sgp1-01-fem-young sshd[16861]: Connection closed by 74.208.145.162 port 59446 [preauth] 
Oct 7 08:42:31 ubuntu-512mb-sgp1-01-fem-young sshd[16863]: Invalid user admin from 74.208.145.162 
Oct 7 08:42:31 ubuntu-512mb-sgp1-01-fem-young sshd[16863]: input_userauth_request: invalid user admin [preauth] 
Oct 7 08:42:32 ubuntu-512mb-sgp1-01-fem-young sshd[16863]: Connection closed by 74.208.145.162 port 59670 [preauth] 
Oct 7 08:42:33 ubuntu-512mb-sgp1-01-fem-young sshd[16865]: Invalid user support from 74.208.145.162 
Oct 7 08:42:33 ubuntu-512mb-sgp1-01-fem-young sshd[16865]: input_userauth_request: invalid user support [preauth] 
Oct 7 08:42:34 ubuntu-512mb-sgp1-01-fem-young sshd[16865]: Connection closed by 74.208.145.162 port 59872 [preauth] 
Oct 7 08:42:39 ubuntu-512mb-sgp1-01-fem-young sshd[16867]: Invalid user admin from 74.208.145.162 
Oct 7 08:42:39 ubuntu-512mb-sgp1-01-fem-young sshd[16867]: input_userauth_request: invalid user admin [preauth] 
Oct 7 08:42:40 ubuntu-512mb-sgp1-01-fem-young sshd[16867]: Connection closed by 74.208.145.162 port 59944 [preauth]

这是否意味着我被黑了？如果是这样，我能做些什么来保护自己？

Stack Overflow是编程和开发问题的网站。这个问题似乎与题目无关，因为它不涉及编程或开发。请参阅帮助中心的[我可以询问哪些主题]（http://*.com/help/on-topic）。也许[超级用户]（http://superuser.com/）或[Unix＆Linux堆栈交换]（http://unix.stackexchange.com/）会是一个更好的地方。 – jww

答

sudo命令让最终用户像root用户一样行事。

要禁用sudo访问，您需要编辑/etc/sudoers文件。

例继sudoers文件条目让测试用户执行任何命令时，来自任何终端的所有用户。

test ALL=(ALL) ALL

测试用户禁用须藤你可以从上面进入/etc/sudoers评论。

`sudo tail -f /var/log/auth.log`是什么意思？

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