场景描述：

[root@ecs-296259 ~]# sudo mkdir /opt/software.openGauss
[root@ecs-296259 ~]# cd /opt/software.openGauss
[root@ecs-296259 software.openGauss]# rm /opt/software.openGauss
rm: cannot remove '/opt/software.openGauss': Is a directory
[root@ecs-296259 software.openGauss]# rmdir /opt/software.openGauss
[root@ecs-296259 software.openGauss]# cd /opt/software.openGauss
-bash: cd: /opt/software.openGauss: No such file or directory
[root@ecs-296259 software.openGauss]# sudo mkdir -p /opt/software/openGauss
[root@ecs-296259 software.openGauss]# cd /opt/software/openGauss
[root@ecs-296259 openGauss]# sudo userdel -r omm
[root@ecs-296259 openGauss]# groupadd dbgroup
groupadd: group 'dbgroup' already exists
[root@ecs-296259 openGauss]# useradd -g dbgroup omm
[root@ecs-296259 openGauss]# sudo userdel -r omm
[root@ecs-296259 openGauss]# sudo useradd -g dbgroup omm
[root@ecs-296259 openGauss]# sudo useradd -g dbgroup onm
[root@ecs-296259 openGauss]# du - omm
du: cannot access '-': No such file or directory
du: cannot access 'omm': No such file or directory
[root@ecs-296259 openGauss]# su - omm
[omm@ecs-296259 ~]$ su - onm
Password: 
su: Permission denied
[omm@ecs-296259 ~]$ su - root
Password: 
su: Permission denied
[omm@ecs-296259 ~]$ esc
-bash: esc: command not found
[omm@ecs-296259 ~]$ cd /opt/software/openGauss
-bash: cd: /opt/software/openGauss: Permission denied
[omm@ecs-296259 ~]$ cd /opt/software/openGauss
-bash: cd: /opt/software/openGauss: Permission denied
[omm@ecs-296259 ~]$ sudo cd /opt/software/openGauss

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 omm: 
Sorry, try again.
[sudo] password for omm: 
Sorry, try again.
[sudo] password for omm: 
sudo: 3 incorrect password attempts
[omm@ecs-296259 ~]$ 

建议方案：