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Image Resize Guide是一个可以调整图片尺寸大小的小工具
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登录到安装oracle数据库服务器的操作系统。打开命令窗口；查看环境变量ORACLE_SID的设置情况：windows： echo %ORACLE_SID%linux： echo $ORACLE_SID设置环境变量ORACLE_SID的值为你想登录的oracle实例的SID：set ORACLE_SID=orcl键入命令：sqlplus / as sysdba就可以以sysdba的身份登录到oracle了！linux系统下，如果找不到sqlplus命令的话，请切换到oracle用户。在sqlplus窗口执行命令：alter user you_username identified by you_password;就可以修改你的用户的密码了~Oracle Database，又名Oracle RDBMS，或简称Oracle。是甲骨文公司的一款关系数据库管理系统。它是在数据库领域一直处于领先地位的产品。可以说Oracle数据库系统是目前世界上流行的关系数据库管理系统，系统可移植性好、使用方便、功能强，适用于各类大、中、小、微机环境。它是一种高效率、可靠性好的 适应高吞吐量的数据库解决方案。
1.安装时选择的自动安装，忘了用户名和密码导致现在试了几个Oracle默认用户名密码後（表格中附带默认用户名及密码），都提示无效的用户名、密码， Username Password Description See Also CTXSYS CTXSYS The Oracle Text account Oracle Text Reference DBSNMP DBSNMP The account used by the Management Agent component of Oracle Enterprise Manager to monitor and manage the database Oracle Enterprise Manager Grid Control Installation and Basic Configuration LBACSYS LBACSYS The Oracle Label Security administrator account Oracle Label Security Administrator's Guide MDDATA MDDATA The schema used by Oracle Spatial for storing Geocoder and router data Oracle Spatial User's Guide and Reference MDSYS MDSYS The Oracle Spatial and Oracle interMedia Locator administrator account Oracle Spatial User's Guide and Reference DMSYS DMSYS The Oracle Data Mining account. Oracle Data Mining Administrator's Guide Oracle Data Mining Concepts OLAPSYS MANAGER The account used to create OLAP metadata structures. It owns the OLAP Catalog (CWMLite). Oracle OLAP Application Developer's Guide ORDPLUGINS ORDPLUGINS The Oracle interMedia user. Plug-ins supplied by Oracle and third party format plug-ins are installed in this schema. Oracle interMedia User's Guide ORDSYS ORDSYS The Oracle interMedia administrator account Oracle interMedia User's Guide OUTLN OUTLN The account that supports plan stability. Plan stability enables you to maintain the same execution plans for the same SQL statements. OUTLN acts as a role to centrally manage metadata associated with stored outlines. Oracle Database Performance Tuning Guide SI_INFORMTN_SCHEMA SI_INFORMTN_SCHEMA The account that stores the information views for the SQL/MM Still Image Standard Oracle interMedia User's Guide SYS CHANGE_ON_INSTALL The account used to perform database administration tasks Oracle Database Administrator's Guide SYSMAN CHANGE_ON_INSTALL The account used to perform Oracle Enterprise Manager database administration tasks. Note that SYS and SYSTEM can also perform these tasks. Oracle Enterprise Manager Grid Control Installation and Basic Configuration SYSTEM MANAGER Another account used to perform database administration tasks. Oracle Database Administrator's Guide 这时候要找到一组用户名、密码提示被锁，才能进行下一步 安装ORACLE时，若没有为下列用户重设密码，则其默认密码如下： 用户名/密码 登录身份 说明 sys/change_on_install SYSDBA或SYSOPER 不能以NORMAL登录，可作为默认的系统管理员 system/manager SYSDBA或NORMAL 不能以SYSOPER登录，可作为默认的系统管理员 sysman/oem_temp sysman 为oms的用户名 scott/tiger NORMAL 普通用户 aqadm /aqadm SYSDBA或NORMAL 高级队列管理员 Dbsnmp/dbsnmp SYSDBA或NORMAL 复制管理员 2，在CMD中启动SQLPLUS；用sqlplus/as sysdba登录，提示 连接到: Oracle Database 10g Express Edition Release 10.2.0.1.0 - Production 3. 执行ALTER USER 你被锁的用户名 ACCOUNT UNLOCK； 4. 重新用SQL/PLUS登录，用你刚刚解锁的用户名、密码； 重新修改密码就可以了！ 具体操作如下： 1.运行->sqlplus /nolog 2.输入conn / as sysdba 管理员账户登录 3.如果用户被锁定先解锁： alter user system account unlock; 4.修改密码： alter user system identified by wanglj; 接下来可以用sqlplus登陆了。
对于oracle10g来说：1.如果不记得sys用户的密码了，采用如下方法可以修改密码：(1)打开cmd，输入sqlplus /nolog，回车。(2)输入“conn / as sysdba”;(3)输入“alter user sys identified by 新密码;”（新密码必须以字母开头，另外每条SQL语句后得分号不能忘）其他用户方式同理2.(1)在cmd中启动sqlplus； (2)用sqlplus/as sysdba登录，使其连接到: Oracle Database 10g Express Edition Release 10.2.0.1.0 - Production (3)执行ALTER USER DBSNMP ACCOUNT UNLOCK； (4) 从新用SQL/PLUS登录，设置用户名、密码； 附：Oracle 10g 默认安装带来的用户名/密码 UsernamePasswordDescriptionSee AlsoCTXSYSCTXSYSThe Oracle Text accountOracle Text ReferenceDBSNMPDBSNMPThe account used by the Management Agent component of Oracle Enterprise Manager to monitor and manage the databaseOracle Enterprise Manager Grid Control Installation and Basic ConfigurationLBACSYSLBACSYSThe Oracle Label Security administrator accountOracle Label Security Administrator's GuideMDDATAMDDATAThe schema used by Oracle Spatial for storing Geocoder and router dataOracle Spatial User's Guide and ReferenceMDSYSMDSYSThe Oracle Spatial and Oracle interMedia Locator administrator accountOracle Spatial User's Guide and ReferenceDMSYSDMSYSThe Oracle Data Mining account.Oracle Data Mining Administrator's GuideOracle Data Mining ConceptsOLAPSYSMANAGERThe account used to create OLAP metadata structures. It owns the OLAP Catalog (CWMLite).Oracle OLAP Application Developer's GuideORDPLUGINSORDPLUGINSThe Oracle interMedia user. Plug-ins supplied by Oracle and third party format plug-ins are installed in this schema.Oracle interMedia User's GuideORDSYSORDSYSThe Oracle interMedia administrator accountOracle interMedia User's GuideOUTLNOUTLNThe account that supports plan stability. Plan stability enables you to maintain the same execution plans for the same SQL statements. OUTLN acts as a role to centrally manage metadata associated with stored outlines.Oracle Database Performance Tuning GuideSI_INFORMTN_SCHEMASI_INFORMTN_SCHEMAThe account that stores the information views for the SQL/MM Still Image StandardOracle interMedia User's GuideSYSCHANGE_ON_INSTALLThe account used to perform database administration tasksOracle Database Administrator's GuideSYSMANCHANGE_ON_INSTALLThe account used to perform Oracle Enterprise Manager database administration tasks. Note that SYS and SYSTEM can also perform these tasks.Oracle Enterprise Manager Grid Control Installation and Basic ConfigurationSYSTEMMANAGERAnother account used to perform database administration tasks.
一、忘记除SYS、SYSTEM用户之外的用户的登录密码。用SYS (或SYSTEM)用户登录。 CONN SYS/PASS_WORD AS SYSDBA; 使用如下语句修改用户的密码。 ALTER USER user_name IDENTIFIED BY newpass; 注意：密码不能全是数字。并且不能是数字开头。否则会出现：ORA-00988: 口令缺失或无效 二、忘记SYS用户，或者是SYSTEM用户的密码。 如果是忘记SYSTEM用户的密码，可以用SYS用户登录。然后用ALTER USER 密令 修改密码。 CONN SYS//PASS_WORD AS SYSDBA; ALTER USER SYSTEM IDENTIFIED BY newpass; 如果是忘记SYS用户的密码，可以用SYSTEM用户登录。然后用ALTER USER 密令 修改密码。 CONN SYSTEM//PASS_WORD ; ALTER USER SYSTEM IDENTIFIED BY newpass; 三、如果SYS,SYSTEM用户的密码都忘记或是丢失。 这一项尤其重要。 方法一、可以使用ORAPWD.EXE 工具修改密码。 开始菜单->运行->输入‘CMD’,打开命令提示符窗口，输入如下命令： orapwd file=D:\oracle\product\10.2.0\db_1\database\pwdctcsys.ora password=newpass 这个命令重新生成了数据库的密码文件。密码文件的位置在ORACLE_HOME目录下 的\database目录下。 这个密码是修改sys用户的密码。除sys和system其他用户的密码不会改变。 方法二、 1.如果不记得sys用户的密码了，采用如下方法可以修改密码：(1)打开cmd，输入sqlplus /nolog，回车。(2)输入“conn / as sysdba”;(3)输入“alter user sys identified by 新密码;”（新密码必须以字母开头，另外每条SQL语句后得分号不能忘）其他用户方式同理2.(1)在cmd中启动sqlplus； (2)用sqlplus/as sysdba登录，使其连接到: Oracle Database 10g Express Edition Release 10.2.0.1.0 - Production (3)执行ALTER USER DBSNMP ACCOUNT UNLOCK； (4) 从新用SQL/PLUS登录，设置用户名、密码； 附：Oracle 10g 默认安装带来的用户名/密码 UsernamePasswordDescriptionSee AlsoCTXSYSCTXSYS The Oracle Text accountOracle Text ReferenceDBSNMPDBSNMPThe account used by the Management Agent component of Oracle Enterprise Manager to monitor and manage the databaseOracle Enterprise Manager Grid Control Installation and Basic ConfigurationLBACSYSLBACSYS The Oracle Label Security administrator accountOracle Label Security Administrator's GuideMDDATAMDDATAThe schema used by Oracle Spatial for storing Geocoder and router dataOracle Spatial User's Guide and ReferenceMDSYSMDSYS The Oracle Spatial and Oracle interMedia Locator administrator accountOracle Spatial User's Guide and ReferenceDMSYSDMSYS The Oracle Data Mining account.Oracle Data Mining Administrator's GuideOracle Data Mining ConceptsOLAPSYSMANAGERThe account used to create OLAP metadata structures. It owns the OLAP Catalog (CWMLite).Oracle OLAP Application Developer's GuideORDPLUGINSORDPLUGINS The Oracle interMedia user. Plug-ins supplied by Oracle and third party format plug-ins are installed in this schema.Oracle interMedia User's GuideORDSYSORDSYS The Oracle interMedia administrator accountOracle interMedia User's GuideOUTLNOUTLNThe account that supports plan stability. Plan stability enables you to maintain the same execution plans for the same SQL statements. OUTLN acts as a role to centrally manage metadata associated with stored outlines.Oracle Database Performance Tuning GuideSI_INFORMTN_SCHEMASI_INFORMTN_SCHEMAThe account that stores the information views for the SQL/MM Still Image StandardOracle interMedia User's GuideSYSCHANGE_ON_INSTALLThe account used to perform database administration tasksOracle Database Administrator's GuideSYSMANCHANGE_ON_INSTALLThe account used to perform Oracle Enterprise Manager database administration tasks. Note that SYS and SYSTEM can also perform these tasks.Oracle Enterprise Manager Grid Control Installation and Basic ConfigurationSYSTEMMANAGERAnother account used to perform database administration tasks.
