[razor1911@CentOS7 ~]$ sudo -s
[sudo] password for razor1911:
razor1911 is not in the sudoers file. This incident will be reported.
Step
[razor1911@CentOS7 ~]$ su - root
Password:
[root@CentOS7 ~]#
[root@CentOS7 ~]# echo 'razor1911 ALL=(ALL) ALL' >> /etc/sudoers
[root@CentOS7 ~]# su - razor1911
Last login: Sat Jan 7 23:34:14 PST 2023 on :0
[razor1911@CentOS7 ~]$ sudo -s
[sudo] password for razor1911:
[root@CentOS7 razor1911]#