Linux 如何给普通用户 sudo 权限

root 用户下给普通用户添加 sudo 权限

useradd syhj
passwd syhj
chmod u+w /etc/sudoers

vi /etc/sudoers
......
    100 root    ALL=(ALL)       ALL
    101 syhj    ALL=(ALL)       ALL
......

chmod u-w /etc/sudoers

普通用户下第一次 sudo 需要输入该普通用户的密码

[root@master ~]#useradd syhj
[root@master ~]#echo 120604 | passwd --stdin syhj
Changing password for user syhj.
passwd: all authentication tokens updated successfully.
[root@master ~]#su - syhj
[syhj@master ~]$cat /root/test.yaml
cat: /root/test.yaml: Permission denied
[syhj@master ~]$sudo cat /root/test.yaml

We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:

    #1) Respect the privacy of others.
    #2) Think before you type.
    #3) With great power comes great responsibility.

[sudo] password for syhj: 
syhj is not in the sudoers file.  This incident will be reported.
[syhj@master ~]$exit
logout
You have new mail in /var/spool/mail/root
[root@master ~]#chmod u+w /etc/sudoers
[root@master ~]#vi /etc/sudoers
[root@master ~]#chmod u-w /etc/sudoers
[root@master ~]#su - syhj
Last login: Tue Aug  9 17:34:16 CST 2022 on pts/2
[syhj@master ~]$cat /root/test.yaml
cat: /root/test.yaml: Permission denied
[syhj@master ~]$sudo cat /root/test.yaml
[sudo] password for syhj: 
apiVersion: v1
kind: Namespace
metadata:
  name: test
  finalizers:
  - kubernetes
[syhj@master ~]$exit
logout