SQL> SELECT name FROM v$datafile WHERE name LIKE '%users01%';

NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/cdb1/users01.dbf

SQL> ALTER TABLESPACE users OFFLINE NORMAL;

Rename the file on server level

HOST mv /u01/app/oracle/oradata/cdb1/users01.dbf /u01/app/oracle/oradata/cdb1/users02.dbf

ALTER TABLESPACE users
    RENAME DATAFILE '/u01/app/oracle/oradata/cdb1/users01.dbf' TO '/u01/app/oracle/oradata/cdb1/users02.dbf';

ALTER TABLESPACE users ONLINE;

SQL> SELECT name FROM v$datafile WHERE name LIKE '%users02%';

NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/cdb1/users02.dbf

SQL>