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O2 authentication is based on the HMS Accounts, formerly known as Ecommons Accounts. Therefore your unix account name is the same as your HMS Account name and your password for the O2 unix account is the same as your HMS Account password.
Unix group
Any user with a Each unix account also has is in at least one unix group with group. This "personal user group" has the same name as the unix account.
However unix groups are also used for controlling access to different resources, such as It may also be a member of other groups to provide access to shared storage space or special computational resources , therefore it is normal for a user to be part of several unix groupson O2.
To see which unix groups are associated with your unix account you can use , run the command groups.
Slurm Account
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