db2 卸载和安装

Db2 卸载步骤（参考）
开始卸载
1. 删除所有数据库。
可以使用“控制中心”或drop database命令删除数据库。笔者卸载而未删除数据库，结果是重新安装后无法建立同名数据库。
若要显示所有已创建的数据库可以执行如下命令：
# db2 list db directory

删除数据库
# db2 drop database 数据库名

[db2inst1@gxmzd-test-db2 ~]$ db2 list dbdirectory

System Database Directory

Number of entries in the directory = 2

Database 1 entry:

Database alias = GXMZDDB
Database name = GXMZDDB
Local database directory = /home/db2inst1/db2inst1
Database release level = d.00
Comment =
Directory entry type = Indirect
Catalog database partition number = 0
Alternate server hostname =
Alternate server port number =

Database 2 entry:

Database alias = GXMZD
Database name = GXMZD
Nodename = GXMZD
Database release level = d.00
Comment =
Directory entry type = Remote
Catalog database partition number = -1
Alternate server hostname =
Alternate server port number =

执行删除数据库动作
# db2 drop database + 数据库名称
[db2inst1@gxmzd-test-db2 ~]$ db2 dropdatabase
SQL0104N An unexpected token "END-OF-STATEMENT" was found following
"DATABASE". Expected tokens may include: "<identifier>". SQLSTATE=42601
[db2inst1@gxmzd-test-db2 ~]$ db2 dropdatabase GXMZDDB
DB20000I The DROP DATABASE command completed successfully.
[db2inst1@gxmzd-test-db2 ~]$ db2 dropdatabase GXMZD
SQL1428N The application is already attached to "DB2INST1" while thecommand
issued requires an attachment to"GXMZD" for successful execution.

二停止DB2管理服务器：
必须要停止DB2管理服务器才能在linux上卸载DB2。
1.1. 作为DB2管理服务器所有者登陆。
1.2. 用db2adminstop命令停止DB2管理服务器

[root@gxmzd-test-db2 home]# su dasusr1
[dasusr1@gxmzd-test-db2 home]$ db2adminstop
SQL4407W The DB2 Administration Server was stopped successfully.

三停止DB2实例：
必须要停止DB2实例才能在linux上卸载DB2。
1.3. 作为具有root用户权限的用户登陆。
1.4. 输入/opt/ibm/db2/V9.7/bin/db2ilist命令，获取系统上的所有DB2实例的名称。
1.5. 注销。
1.6. 作为想要停止的实例的所有者登陆。
1.7. 进入该用户的主目录下，运行脚本：. sqllib/db2profile
1.8. 输入db2 forceapplication all命令来停止所有数据库应用程序。
1.9. 输入db2stop命令来停止DB2数据库管理器。
1.10. 输入db2terminate来确认DB2数据库管理器已停止。
1.11. 对每一个要删除的实例重复以上步骤。
[db2inst1@gxmzd-test-db2 home]$/opt/ibm/db2/V9.7/bin/db2ilist
db2inst1
[db2inst1@gxmzd-test-db2 home]$ cd db2inst1
[db2inst1@gxmzd-test-db2 ~]$ ls
db2inst1 sqllib
[db2inst1@gxmzd-test-db2 ~]$ ll
总用量 8
drwxr-xr-x. 2 db2inst1 db2iadm1 4096 Apr 13 00:32 db2inst1
drwxrwsr-t. 23 db2inst1 db2iadm1 4096 Apr12 11:41 sqllib
[db2inst1@gxmzd-test-db2 ~]$ .sqllib/db2profile
[db2inst1@gxmzd-test-db2 ~]$ db2 forceapplication all
DB20000I The FORCE APPLICATION command completed successfully.
DB21024I This command is asynchronous and may not be effective immediately.

[db2inst1@gxmzd-test-db2 ~]$
[db2inst1@gxmzd-test-db2 ~]$ db2stop
SQL1064N DB2STOP processing was successful.

[db2inst1@gxmzd-test-db2 ~]$ db2 terminate
DB20000I The TERMINATE command completed successfully.

4. 删除DB2管理服务器：
必须删除DB2管理服务器才能卸载DB2。
1.12. 作为DB2管理服务器所有者登陆。
1.13. 进入该用户的主目录下，运行脚本：. das/dasprofile.
1.14. 注销。
1.15. 作为root登陆，通过输入命令/opt/ibm/db2/V9.7/instance/dasdrop除去DB2管理服务器。
[dasusr1@gxmzd-test-db2 home]$ cd dasusr1
[dasusr1@gxmzd-test-db2 ~]$ ls
das
[dasusr1@gxmzd-test-db2 ~]$ .das/dasprofile
[dasusr1@gxmzd-test-db2 ~]$
[dasusr1@gxmzd-test-db2 ~]$ exit
exit
[root@gxmzd-test-db2 home]#
[root@gxmzd-test-db2 home]#
[root@gxmzd-test-db2 home]#/opt/ibm/db2/V9.7/instance/dasdrop
SQL4410W The DB2 Administration Server is not active.
DBI1070I Program dasdrop completed successfully.

5. 删除DB2实例：
一旦删除系统上的实例，该实例下的所有DB2数据库都将不可用。
1.16. 通过输入/opt/ibm/db2/V9.7/instance/db2idropdb2instname删除实例。
[root@gxmzd-test-db2 home]#/opt/ibm/db2/V9.7/instance/db2idrop db2inst1
DBI1070I Program db2idrop completed successfully.

6. 卸载DB2产品
以root身份登陆，到DB2版本产品CD-ROM上的根目录或DB2安装文件（通常就是tar解包文件）下找到 db2_deinstall命令，
运行db2_deinstall －a命令可以删除所有DB2产品。
可能需要输入DB2安装路径，这里是/var/opt/ibm/db2/V9.7
然后也可以在LINUX中删除DB2用户，这并非必须，重新安装仍可使用它们。

[root@gxmzd-test-db2 expc]# ls
db2 db2_deinstall db2ls db2setup installFixPack readmefirst.htm
db2ckupgrade db2_install db2prereqcheck doc readmefirst readmefirst.txt
[root@gxmzd-test-db2 expc]# ./db2_deinstall-a

Enter full path name for the installdirectory -

------------------------------------------------
/opt/ibm/db2/V9.7
DBI1016I Program db2_deinstall is performing uninstallation. Please
wait.

The execution completed successfully.

For more information see the DB2uninstallation log at
"/tmp/db2_deinstall.log.31318".
[root@gxmzd-test-db2 expc]#