在一個11.2.0.2 for Linux X86-64環境中，執行csscan工具報錯。

錯誤資訊為：

[oracle@dbserver2 ~]$ cd $ORACLE_HOME/bin
[oracle@dbserver2 bin]$ csscan help=y
csscan: error while loading shared libraries: libclntsh.so.11.1: cannot open shared object file: No such file or directory

檢查metalink，在文件ID 742070.1中提到，導致這個問題的原因是沒有正確的設定LD_LIBRARY_PATH環境變數，將$ORACLE_HOME/lib新增到這個環境變數中可以避免錯誤的產生：

[oracle@dbserver2 bin]$ env|grep LD_LIB
LD_LIBRARY_PATH=/etc/emc/rsa/cst/lib
[oracle@dbserver2 bin]$ export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH
[oracle@dbserver2 bin]$ csscan help=y

Character Set Scanner v2.2 : Release 11.2.0.2.0 - Production on Mon Jun 6 17:46:04 2011

You can let Scanner prompt you for parameters by entering the CSSCAN
command followed by your username/password:

Example: CSSCAN \"SYSTEM/MANAGER AS SYSDBA\"

Or, you can control how Scanner runs by entering the CSSCAN command
followed by various parameters. To specify parameters, you use keywords:

Example:
CSSCAN \"SYSTEM/MANAGER AS SYSDBA\" FULL=y TOCHAR=utf8 ARRAY=1024000 PROCESS=3

Keyword    Default Prompt Description
---------- ------- ------ -------------------------------------------------
USERID             yes    username/password
FULL       N       yes    scan entire database
USER               yes    owner of tables to be scanned
TABLE              yes    list of tables to scan
COLUMN             yes    list of columns to scan
EXCLUDE                   list of tables to exclude from scan
TOCHAR             yes    new database character set name
FROMCHAR                  current database character set name
TONCHAR                  new national character set name
FROMNCHAR                 current national character set name
ARRAY      1024000 yes    size of array fetch buffer
PROCESS    1       yes    number of concurrent scan process
MAXBLOCKS                 split table if block size exceed MAXBLOCKS
CAPTURE    N              capture convertible data
SUPPRESS                  maximum number of exceptions logged for each table
FEEDBACK                  report progress every N rows
BOUNDARIES                list of column size boundaries for summary report
LASTRPT    N              generate report of the last database scan
LOG        scan           base file name of report files
PARFILE                   parameter file name
PRESERVE   N              preserve existing scan results
LCSD       N       no     enable language and character set detection
LCSDDATA   LOSSY   no     define the scope of the detection
HELP       N              show help screen (this screen)
QUERY      N              select clause to scan subset of tables or columns
---------- ------- ------ -------------------------------------------------
Scanner terminated successfully.

採用這個方法確實解決了問題。不過奇怪的問題是，另外一臺伺服器採用相同方式安裝的資料庫，並不存在這個問題，而且這臺伺服器上的LD_LIBRARY_PATH的設定與出現問題的伺服器完全一致：

[oracle@dbserver1 ~]$ cd $ORACLE_HOME/bin
[oracle@dbserver1 bin]$ csscan help=y

Character Set Scanner v2.2 : Release 11.2.0.2.0 - Production on Mon Sep 5 17:47:18 2011

You can let Scanner prompt you for parameters by entering the CSSCAN
command followed by your username/password:

Example: CSSCAN \"SYSTEM/MANAGER AS SYSDBA\"

Or, you can control how Scanner runs by entering the CSSCAN command
followed by various parameters. To specify parameters, you use keywords:

Example:
CSSCAN \"SYSTEM/MANAGER AS SYSDBA\" FULL=y TOCHAR=utf8 ARRAY=1024000 PROCESS=3

Keyword    Default Prompt Description
---------- ------- ------ -------------------------------------------------
USERID             yes    username/password
FULL       N       yes    scan entire database
USER               yes    owner of tables to be scanned
TABLE              yes    list of tables to scan
COLUMN             yes    list of columns to scan
EXCLUDE                   list of tables to exclude from scan
TOCHAR             yes    new database character set name
FROMCHAR                  current database character set name
TONCHAR                   new national character set name
FROMNCHAR                 current national character set name
ARRAY      1024000 yes    size of array fetch buffer
PROCESS    1       yes    number of concurrent scan process
MAXBLOCKS                 split table if block size exceed MAXBLOCKS
CAPTURE    N              capture convertible data
SUPPRESS                  maximum number of exceptions logged for each table
FEEDBACK                  report progress every N rows
BOUNDARIES                list of column size boundaries for summary report
LASTRPT    N              generate report of the last database scan
LOG        scan           base file name of report files
PARFILE                   parameter file name
PRESERVE   N              preserve existing scan results
LCSD       N       no     enable language and character set detection
LCSDDATA   LOSSY   no    define the scope of the detection
HELP       N              show help screen (this screen)
QUERY      N              select clause to scan subset of tables or columns
---------- ------- ------ -------------------------------------------------
Scanner terminated successfully.
[oracle@dbserver1 bin]$ env|grep LD_LIB
LD_LIBRARY_PATH=/etc/emc/rsa/cst/lib

雖然metalink給出的解決方法確實有效，但是導致這個問題的原因和可能是多個方面的，至少文件沒有給出為什麼同樣配置同樣版本的兩個資料庫，在一個上沒有問題，而另一個上執行就出現錯誤。

執行csscan出現loading shared libraries錯誤

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