Not able to Start the oracle db error "ORA-01031: insufficient privileges"

Question

Hi experts,
I have oracle 11g setup on so solaris. i changed the db_cache_size
& processes values and stopped the DB services after that i am not able to start the oracle DB. Listener is running.
when i start the db server its giving the below error(startup.log)
./dbstart: Starting up database "orcl"
Mon Sep 27 04:31:08 MDT 2010
SQL*Plus: Release 11.1.0.7.0 - Production on Mon Sep 27 04:31:08 2010
Copyright (c) 1982, 2008, Oracle. All rights reserved.
SQL> ERROR:
ORA-01031: insufficient privileges
SQL> ORA-01031: insufficient privileges
SQL>
./dbstart: Database instance "orcl" warm started.
Please help me to ressolve this issue.
Thanks
Krishna

Answer 1

yes, password file is there in /etc/passwd
here are the contents:
root:x:0:0:Super-User:/:/sbin/sh
lroot:x:0:0:Super-User:/:/sbin/sh
daemon:x:1:1::/:
bin:x:2:2::/usr/bin:/bin/false
sys:x:3:3::/:
adm:x:4:4:Admin:/var/adm:/bin/false
lp:x:71:8:Line Printer Admin:/usr/spool/lp:/bin/false
uucp:x:5:5:uucp Admin:/usr/lib/uucp:/bin/false
nuucp:x:9:9:uucp Admin:/var/spool/uucppublic:/usr/lib/uucp/uucico
listen:x:37:4:Network Admin:/usr/net/nls:/bin/false
nobody:x:60001:60001:Nobody:/:/bin/false
noaccess:x:60002:60002:No Access User:/:/bin/false
nobody4:x:65534:65534:SunOS 4.x Nobody:/:/bin/false
itunix:x:50000:14:IT Unix Account:/export/home/itunix:/bin/csh
hharika:x:765:38:Harpal Harika:/export/home/hharika:/bin/csh
prsingh:x:795:38:Pradeep Singh:/export/home/prsingh:/bin/csh
mmir:x:1229:21:Mir Monis Ali:/export/home/mmir:/bin/csh
bogunnai:x:1207:21:Bose Ogunnaike:/export/home/bogunnai:/bin/ksh
mpokala:x:2117:21:Mahesh Pokala:/export/home/mpokala:/bin/ksh
apopov:x:2385:38:Anton Popov:/export/home/apopov:/bin/csh
kkeith:x:2629:227:Kevin Keith:/home/kkeith:/usr/bin/ksh
sshd:x:22:22:SSH Privsep:/var/empty:/bin/false
patrol:x:2784:10:Patrol User:/opt/bmc:/usr/bin/ksh
smmsp:x:25:25:Sendmail Submission user:/none:/bin/false
ldap:x:50001:1002::/export/home/ldap:/bin/sh
perfuser:x:884:268::/export/home/perfuser:/bin/csh
webservd:x:80:80::/home/webservd:/bin/pfsh
oracle:x:156:40:Oracle Software Owner:/export/home/oracle:/bin/bash
perfuser_idc:x:64383:1::/home/perfuser_idc:/bin/sh
idc_perf:x:64384:292::/home/idc_perf:/bin/sh