安装完成后，欲登陆sample数据库和toolsdb，发现出错：
db2 => connect to sample
SQL1031N The database directory cannot be found on the indicated file system.
db2 => connect to toolsdb
SQL1031N The database directory cannot be found on the indicated file system.
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1、 猜想数据库未安装，查看/hom/db2inst1目录下的，仅有sqllib文件夹：
[db2inst1@localhost ~]$ ls
sqllib
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对比下其他学员的情况，发现本人的服务器上少了一个db2inst1目录：
[db2inst1@localhost ~]$ ls
b2inst1 sqllib
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2、下面手动对两个数据库进行创建：
2.1、创建示例数据库：
[db2inst1@localhost ~]$ db2sampl
Creating database "SAMPLE"...
Connecting to database "SAMPLE"...
Creating tables and data in schema "DB2INST1"...
Creating tables with XML columns and XML data in schema "DB2INST1"...
'db2sampl' processing complete.
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2.2、创建toolsbd数据库：
[db2inst1@localhost NODE0000]$ db2 create tools catalog systools create new database toolsdb
DB20000I The CREATE TOOLS CATALOG command completed successfully.
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2.3、确认相应数据库文件创建的情况：
[db2inst1@localhost NODE0000]$ cd
[db2inst1@localhost ~]$ ls
db2inst1 sqllib
[db2inst1@localhost ~]$ cd db2inst1/
[db2inst1@localhost db2inst1]$ ls
NODE0000
[db2inst1@localhost db2inst1]$ cd NODE0000/
[db2inst1@localhost NODE0000]$ ls
SAMPLE SQL00001 SQL00002 sqldbdir TOOLSDB
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2.4、登陆数据库。首先登陆到sample，然后断开与该数据库的连接，再连接到toolsdb：
[db2inst1@localhost NODE0000]$ db2
(c) Copyright IBM Corporation 1993,2007
Command Line Processor for DB2 Client 9.7.1
You can issue database manager commands and SQL statements from the command
prompt. For example:
db2 => connect to sample
db2 => bind sample.bnd
For general help, type: ?.
For command help, type: ? command, where command can be
the first few keywords of a database manager command. For example:
? CATALOG DATABASE for help on the CATALOG DATABASE command
? CATALOG for help on all of the CATALOG commands.
To exit db2 interactive mode, type QUIT at the command prompt. Outside
interactive mode, all commands must be prefixed with 'db2'.
To list the current command option settings, type LIST COMMAND OPTIONS.
For more detailed help, refer to the Online Reference Manual.
db2 => connect to sample
Database Connection Information
Database server = DB2/LINUX 9.7.1
SQL authorization ID = DB2INST1
Local database alias = SAMPLE
db2 => disconnect sample
DB20000I The SQL DISCONNECT command completed successfully.
db2 => connect to toolsdb
Database Connection Information
Database server = DB2/LINUX 9.7.1
SQL authorization ID = DB2INST1
Local database alias = TOOLSDB
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