If the user name already exists, the DB2 Setup wizard appends a number from 1-99 to the default user name, until a user ID that does not already exist can be created.

如果该用户名已经存在，DB 2安装向导就会在默认的名称后面增加一个1 - 99的数字，直到遇到一个不存在的用户ID。

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This is a security measure. It insures that an unauthorized user cannot tell the difference between a case where an account exists and when the account does not exist.

这是个安全特性，确保未授权的用户不能区分他请求的这个账号是否存在。

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