修改oracle数据库密码

1.用Xshell远程连接安装数据库的服务器,切换到安装oracle数据库的用户下,(我的oracle数据库就安装在oracle用户下)

命令: su - oracle;

2.进入oracle控制台
命令: sqlplus /nolog;
以dba角色进入
命令: conn /as sysdba;

3.连接成功后,查看用户列表
命令: select username from dba_user;

4.若修改某一个用户密码,修改用户口令格式为: alter user username identified by newpassword;
例如修改用户demo的密码:
命令: alter user demo identified by demo123;

5.修改成功

以下为修改详细过程:

Xshell for Xmanager Enterprise 4 (Build 0182)
Copyright (c) 2002-2011 NetSarang Computer, Inc. All rights reserved.

Type `help' to learn how to use Xshell prompt.
Xshell:\> 

Connecting to 192.168.1.24:22...
Connection established.
Escape character is '^@]'.

Last login: Sun Oct  9 09:09:31 2016 from 172.16.5.212
[root@kdyd01 ~]# SU - oracle
-bash: SU: command not found
[root@kdyd01 ~]# su - oracle
[oracle@kdyd01 ~]$ sqlplus /nolog

SQL*Plus: Release 11.2.0.4.0 Production on Thu Oct 20 13:45:13 2016

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

SQL> conn /as sysdba
Connected.
SQL> select username from dba_users;

USERNAME
------------------------------
DSG
TMR
PLATFORM
SDQN
SYS
SYSTEM
BJUSER
FLOWS_FILES
MDSYS
ORDSYS
EXFSYS

USERNAME
------------------------------
DBSNMP
SCOTT
WMSYS
ORACLE_OCM
APPQOSSYS
XS$NULL
APEX_030200
OWBSYS_AUDIT
MDDATA
ORDDATA
CTXSYS

USERNAME
------------------------------
ANONYMOUS
OUTLN
DIP
APEX_PUBLIC_USER
SYSMAN
XDB
SPATIAL_CSW_ADMIN_USR
SPATIAL_WFS_ADMIN_USR
ORDPLUGINS
OWBSYS
MGMT_VIEW

USERNAME
------------------------------
SI_INFORMTN_SCHEMA
OLAPSYS

35 rows selected.

SQL> alter user bjuser identified by BJUser;

User altered.

SQL> exit;
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
[oracle@kdyd01 ~]$ sqlplus bjuser/BJUser

SQL*Plus: Release 11.2.0.4.0 Production on Thu Oct 20 14:02:44 2016

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL>