sudo usermod -G root,oinstall,dba oracle
id oracle
uid=1001(oracle) gid=1001(oinstall) groups=1001(oinstall),0(root),1002(dba)
sudo usermod -G root,oinstall,dba oracle
id oracle
uid=1001(oracle) gid=1001(oinstall) groups=1001(oinstall),0(root),1002(dba)