Adding Users and Groups
Use the default opc
user to add users and groups to a newly created instance.
We recommend that you create and configure users and groups according to their access requirements. Sign in to the instance as the opc
user (see Accessing an Instance), and then add users and groups as necessary. See Create users and groups on Oracle Linux for a general introduction to users and groups on Oracle Linux.
The opc user
Oracle Linux instances have a default opc
user. Use this account to create and configure other users and groups.
The opc
account has:
-
Full
sudo
privileges. -
No password by default.
Instead you access the account over SSH with a key pair configured when you create the instance (see Accessing an Instance).
Adding a User
To add an account with the username alice
to the system:
sudo useradd alice
To set a password for the user:
sudo passwd alice
Adding a Group
To add a group called staff
to the system:
sudo groupadd staff
To add the user alice
to the group staff
:
sudo usermod -G staff alice
Manage the users in a group using the groupmems
command. For example, to remove alice
from the group staff
:
sudo groupmems -d alice -g staff
Configuring Permissions
Define permissions by configuring users and groups within /etc/sudoers
.
By default, members of the wheel
group can use sudo
to obtain all root privileges. You can add entries for users or groups by adding files to /etc/sudoers.d
. For example, the privileges assigned to the opc
user are defined in /etc/sudoers.d/90-cloud-init-users
.