Solve the problem of unable to log in to Alibaba Cloud ECS when switching from key to ROOT

Although some of the problems recorded in the Snail Blog are not trivial to the big guys, they are still of some use to some newcomers, because the content is about colleagues, myself, and netizens who help solve problems when they encounter them. record of. For example, the Alibaba Cloud ECS server purchased by this netizen yesterday was probably the first time he used it. When purchasing, he was not clear about the difference between key login and password login.

I probably chose the key randomly and didn’t understand how my friend set it up and then activated it. Of course, you can imagine later that you cannot log in to install the WEB environment. Under normal circumstances, we either set a key to log in. Users who are not familiar with the key can log in with a password. Generally, it is better to set a complex password and change the port. At least it is safer than setting the key casually and losing the key. .

At this time, Snail did not have remote help operations. I told him directly that since nothing is installed on your server, shut down first, and then reinstall the system (you need to shut down before reinstalling), and then enter the password location Set the ROOT password honestly. You can add it if you need to use the key to log in in the future.

The problem came at this time. I did log in with the password that was set when reinstalling the system, and I took a screenshot of it, but I couldn’t log in. I also doubted whether he entered his own password and completed the installation. System login is different. So I didn't believe this evil and reinstalled it again. The password was written down first and then copied and filled in. It still doesn't work. I also logged in to test it, but it doesn't work. It even prompts that a key is required. This is weird.

If you don’t believe this, reset the password in the background panel and fill in the same password. After the settings are completed, restart the server. This is actually done. Just record this issue briefly.

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