how to change sys password in Oracle 10g

 To Change the ""SYS"  Password

SQL> conn sys as sysdba
Enter password: (null) no need to give anything
Connected.
SQL> passw system
Changing password for system
New password: (new password)
Retype new password: (new password)
Password changed
SQL> conn system/(new password) 
Connected.
SQL> passw sys
Changing password for sys
New password: (new sys password )
Retype new password: (new sys password )
Password changed
SQL>




any mistake is there or u wanna give any suggestion so please write to me ............

MANAGE USER

HOW To create USER
SQL>create user chetan
  2  identified by c
  3  default tablsespace SYSTEM
  4  temporary tablespace TEMP
  5  quota 20 m on SYSTEM
  6  password expire;
-------------

change system tablespace 

SQL> create user chetan
  2  identified by c
  3  default tablespace EXAMPLE
  4  temporary tablespace TEMP
  5  quota 15m on EXAMPLE
  6  password expire;

User created.

now its created ...


TO see the session privilege

SQL>select * from session_privs;

PRIVILEGE
----------------------------------------
CREATE SESSION

---------------------------------------------------


How to create Profile

______________________________
CREATION OF PROFILE
______________________________
create profile  profile_name limit
  sessions_per_user                 2   --
  cpu_per_session               10000   -- hunderth of seconds
  cpu_per_call                      1   -- hunderth of seconds
  connect_time              unlimited   -- minutes
  idle_time                        30   -- minutes
  logical_reads_per_session   default   -- db blocks
  logical_reads_per_call      default   -- db blocks
  -- composite_limit          default   --
  private_sga                     20M   --
  failed_login_attempts             3   --
  password_life_time               30   -- days
  password_reuse_time              12   --
  password_reuse_max        unlimited   --
  password_lock_time          default   -- days
  password_grace_time               2   -- days
  password_verify_function       null;



EXAMPLE Is blow


SQL >create profile ram limit
    sessions_per_user 2
    connect_time 30
    idle_time 30
    failed_login_attempts 4
    password_life_time 2
    password_reuse_time 5
    password_grace_time 1;
    
 Profile created.

-----------


how to see a profile

SQL> show user
USER is "SYS"

SQL> desc dba_profiles
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 PROFILE                                   NOT NULL VARCHAR2(30)
 RESOURCE_NAME                             NOT NULL VARCHAR2(32)
 RESOURCE_TYPE                                      VARCHAR2(8)
 LIMIT                                              VARCHAR2(40)

SQL> select profile from dba_profiles;

PROFILE
------------------------------
DEFAULT
DEFAULT
DEFAULT
DEFAULT
DEFAULT
DEFAULT
DEFAULT
DEFAULT
DEFAULT
DEFAULT
DEFAULT

PROFILE
------------------------------
DEFAULT
DEFAULT
DEFAULT
DEFAULT
DEFAULT
MONITORING_PROFILE
MONITORING_PROFILE
MONITORING_PROFILE
MONITORING_PROFILE
MONITORING_PROFILE
MONITORING_PROFILE

PROFILE
------------------------------
MONITORING_PROFILE
MONITORING_PROFILE
MONITORING_PROFILE
MONITORING_PROFILE
MONITORING_PROFILE
MONITORING_PROFILE
MONITORING_PROFILE
MONITORING_PROFILE
MONITORING_PROFILE
MONITORING_PROFILE
RAM

PROFILE
------------------------------
RAM
RAM
RAM
RAM
RAM
RAM
RAM
RAM
RAM
RAM
RAM

PROFILE
------------------------------
RAM
RAM
RAM
RAM

48 rows selected.
---------------------------------------------------------------------------
SQL> select * from dba_profiles where profile='RAM';

PROFILE                        RESOURCE_NAME                    RESOURCE
------------------------------ -------------------------------- --------
LIMIT
----------------------------------------
RAM                            COMPOSITE_LIMIT                  KERNEL
DEFAULT

RAM                            SESSIONS_PER_USER                KERNEL
2

RAM                            CPU_PER_SESSION                  KERNEL
DEFAULT


PROFILE                        RESOURCE_NAME                    RESOURCE
------------------------------ -------------------------------- --------
LIMIT
----------------------------------------
RAM                            CPU_PER_CALL                     KERNEL
DEFAULT

RAM                            LOGICAL_READS_PER_SESSION        KERNEL
DEFAULT

RAM                            LOGICAL_READS_PER_CALL           KERNEL
DEFAULT


PROFILE                        RESOURCE_NAME                    RESOURCE
------------------------------ -------------------------------- --------
LIMIT
----------------------------------------
RAM                            IDLE_TIME                        KERNEL
30

RAM                            CONNECT_TIME                     KERNEL
30

RAM                            PRIVATE_SGA                      KERNEL
DEFAULT


PROFILE                        RESOURCE_NAME                    RESOURCE
------------------------------ -------------------------------- --------
LIMIT
----------------------------------------
RAM                            FAILED_LOGIN_ATTEMPTS            PASSWORD
4

RAM                            PASSWORD_LIFE_TIME               PASSWORD
2

RAM                            PASSWORD_REUSE_TIME              PASSWORD
5


PROFILE                        RESOURCE_NAME                    RESOURCE
------------------------------ -------------------------------- --------
LIMIT
----------------------------------------
RAM                            PASSWORD_REUSE_MAX               PASSWORD
DEFAULT

RAM                            PASSWORD_VERIFY_FUNCTION         PASSWORD
DEFAULT

RAM                            PASSWORD_LOCK_TIME               PASSWORD
DEFAULT


PROFILE                        RESOURCE_NAME                    RESOURCE
------------------------------ -------------------------------- --------
LIMIT
----------------------------------------
RAM                            PASSWORD_GRACE_TIME              PASSWORD
1


16 rows selected.
-----------------------------------------







any mistake is there or u wanna give any suggestion so please write to me ............