os authentication for backup tool

Hi Team,

We are using 2 node RAC with version oracle database 19.17. Single CDB with single PDB.

We are integrating our DB with external tool to take backups.

We are asked to provide DB user and os account.

We have created DB common user and provided sysbackup privilege.

For os user:

We created new user and assign below groups. How to validate whether it is working.

[root@erpuatdb1 ~]# useradd -g oinstall -G backupdba,oinstall orarman
[root@erpuatdb1 ~]# passwd orarman
Changing password for user orarman.
New password:
Retype new password:
passwd: all authentication tokens updated successfully.

Logged in with orarman

[orarman@erpuatdb1 19chome]$ id oracle