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。

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.

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如果该用户已经存在，向导就会继续搜索(db2inst4、db2inst5等等)，直到发现可用的用户。

If the user already exists, the wizard continues its search (db2inst4, db2inst5, and so on) until it finds an available user.

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