FINDING PID PROCESS ID USING VIEWS

through SQL*Plus via the following query :

SYS@prod SQL>select b.name bkpr , s.Username spid, p.pid
2 from V$BGPROCESS b, V$SESSION s, V$PROCESS p
3 where p.Addr = b.Paddr(+)
4 and p.Addr = s.Paddr
5 /

BKPR  SPID                                  PID
----- ------------------------------ ----------
PMON                                          2
PSP0                                             3
MMAN                                         4
DBW0                                           5
ARC0                                          17
ARC1                                          18
ARC2                                          19
LGWR                                          6
CKPT                                           7
RVWR                                        16
SMON                                           8

BKPR  SPID                                  PID
----- ------------------------------ ----------
RECO                                          9
CJQ0                                         10
QMNC                                       20
MMON                                      11
MMNL                                       12
                                            28
                                            26
                                            21
                                            27
                                            23
                                            25

BKPR  SPID                                  PID
----- ------------------------------ ----------
                                           22
SYS                                    15
                                           24
                                           29

26 rows selected.

using os linux command in SQL*Plus
(if it is linux os)
ps -ef | grep oracle
or
ps -ef | grep database_name

SYS@prod SQL>!ps -ef | grep prod
oracle    7636     1  0 12:26 ?        00:00:00 ora_pmon_prod
oracle    7638     1  0 12:26 ?        00:00:00 ora_psp0_prod
oracle    7640     1  0 12:26 ?        00:00:00 ora_mman_prod
oracle    7642     1  0 12:26 ?        00:00:00 ora_dbw0_prod
oracle    7644     1  0 12:26 ?        00:00:00 ora_lgwr_prod
oracle    7646     1  0 12:26 ?        00:00:00 ora_ckpt_prod
oracle    7648     1  0 12:26 ?        00:00:00 ora_smon_prod
oracle    7650     1  0 12:26 ?        00:00:00 ora_reco_prod
oracle    7652     1  0 12:26 ?        00:00:00 ora_cjq0_prod
oracle    7654     1  0 12:26 ?        00:00:00 ora_mmon_prod
oracle    7656     1  0 12:26 ?        00:00:00 ora_mmnl_prod
oracle    7658     1  0 12:26 ?        00:00:00 ora_d000_prod
oracle    7660     1  0 12:26 ?        00:00:00 ora_s000_prod
oracle    7663     1  0 12:26 ?        00:00:00 ora_rvwr_prod
oracle    7664  7633  0 12:26 ?        00:00:00 oracleprod (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oracle    7666     1  0 12:26 ?        00:00:00 ora_arc0_prod
oracle    7668     1  0 12:26 ?        00:00:00 ora_arc1_prod
oracle    7672     1  0 12:26 ?        00:00:00 ora_qmnc_prod
oracle    7688     1  0 12:26 ?        00:00:00 ora_q000_prod
oracle    7690     1  0 12:26 ?        00:00:00 ora_q001_prod
oracle    8049     1  3 13:42 ?        00:00:00 ora_j000_prod
oracle    8050  7633  1 13:42 pts/1    00:00:00 -bin/tcsh -c ps -ef | grep prod
oracle    8063  8050  0 13:42 pts/1    00:00:00 grep prod

Thank you,