I am an Antergos user. A guy, who is an Ubuntu user, asked me for helping him how to install Oracle 18c Express, so I helped him and made a test to prepare the tutorial for him.
I downloaded and extracted a RPM package of Oracle 18c Express. I ran the script
runInstall from Oracle folder without root. But I was not aware that Oracle has created its user and modified my password.
I open Stacer and started to clean. While cleaning, Stacer asked me to type my password. I typed my exact and correct password, but it did not recognise and classified it as invalid. I found it strange. I also have tried to unlock in the Settings app.
So I have tested on the terminal, running the command
su -, and typing my password. I entered successfully as root. But it is strange that my password was not accepted in the GUI apps, while accepted in the terminal.
I logged out and noticed the user “oracle”. I began to understand that Oracle is controlling the apps. I have already run the command
sudo userdel -r oracle, and rebooted, but Oracle is still controlling the apps.
$ sudo cat /etc/sudoers root ALL=(ALL) ALL $ sudo cat /etc/sudoers.d/10-installer gusbemacbe ALL=(ALL) ALL
And I found
oracle in the
backupdba:x:65538:oracle dba:x:65536:oracle dgdba:x:65539:oracle gusbemacbe:x:1000: kmdba:x:65540:oracle oinstall:x:65535:oracle oper:x:65537:oracle racdba:x:65541:oracle wheel:x:998:gusbemacbe