Linux switches the root user, user is not in the sudoers file. This matter will be reported

phenomenon

Failed when switching root user

[test1@xxx /]$ sudo root

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总结起来无外乎这三点：

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[sudo] test1 的密码：
test1 不在 sudoers 文件中。此事将被报告。

the reason

Because the sudo operation of the administrator authority is controlled in the Linux system to prevent general users from sudo operation, it is necessary to manage the administrator authority user, and the administrator authority list is recorded in the sudoers file

Approach

• Re-use the root user to enter the system
• Modify sudiers file and add test1 user permissions under root

vim /etc/sudoers

root	ALL=(ALL) 	ALL
test1  ALL=(ALL)   ALL