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密码文件的恢复 || EM登录失败的解决

 2012-06-26 15:06:01 来源:WEB开发网   
核心提示: 1,密码文件默认位置是:/u01/oracle/product/10.2.0/db_1/dbs/orapwSID如果密码文件被损坏,密码文件的恢复 || EM登录失败的解决,则无法远程登录,em无法登录,sys与sysoper权限的不同之处:SQL> select * from system_privilege

 1,密码文件默认位置是:/u01/oracle/product/10.2.0/db_1/dbs/orapwSID
如果密码文件被损坏,则无法远程登录,em无法登录,会出现,“username or password invalid”的错误。
2,这时可以重新创建密码文件:
cd /u01/oracle/product/10.2.0/db_1/dbs
orapwd file=orapwdv11 password=oracle entries=5 force=y
3,查看密码文件:
SQL> select * from v$pwfile_users;
USERNAME SYSDB SYSOP
------------------------------ ----- -----
SYS TRUE TRUE

[[email protected] dbs]$ strings orapwdv11
]\[Z
ORACLE Remote Password file
INTERNAL
AB27B53EDC5FEF41
8A8F025737A9097A
SYSTEM
2D594E86F93B17A1
4,对system赋sysoper权限,则system的信息就会被写入密码文件:
SQL> grant sysoper to system;
Grant succeeded.
SQL> select * from v$pwfile_users;
USERNAME SYSDB SYSOP
------------------------------ ----- -----
SYS TRUE TRUE
SYSTEM FALSE TRUE
5,sys与sysoper权限的不同之处:
SQL> select * from system_privilege_map where name like '%SYS%';
PRIVILEGE NAME PROPERTY
---------- ---------------------------------------- ----------
-3 ALTER SYSTEM 0
-4 AUDIT SYSTEM 0
-83 SYSDBA 0
-84 SYSOPER 0

When you connect with SYSDBA or SYSOPER privileges, you connect with a default schema,
not with the schema that is generally associated with your username.
For SYSDBA this schema is SYS; for SYSOPER the schema is PUBLIC


SQL> conn / as sysdba
SQL> show user
USER is "SYS"
SQL> conn / as sysoper
Connected.
SQL> show user
USER is "PUBLIC"
6,密码认证类型:
SQL> show parameter remote_login_passwordfile
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
remote_login_passwordfile string EXCLUSIVE

remote_login_passwordfile = none | exclusive |shared 位于$ORACLE_HOME/dbs/spfile$ORACLE_SID.ora参数文件中
none : 不使用密码文件认证
exclusive :要密码文件认证,自己独占使用(默认值)
shared :要密码文件认证,不同实例dba用户可以共享密码文件

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
useful scripts:
alter user system identified by oracle;
alter user scott account unlock;
grant sysdba to system;
show parameter pfile
show parameter spfile
show parameter remote_login_passwordfile
desc v$pwfile_users;
select * from v$pwfile_users;
cd /u01/oracle/product/10.2.0/db_1/dbs
orapwd file=orapwdv11 password=oracle entries=5 force=y
strings orapwdv11
SQL> select * from v$pwfile_users;
USERNAME SYSDB SYSOP
------------------------------ ----- --
---
SYS TRUE TRUE
SQL> grant sysoper to system;

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Tags:密码 文件 恢复

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