往日常用操作沒有問題，但今天在使用 imp 命令匯入 oracle 資料庫時報錯：

IMP-00058: 遇到 ORACLE 錯誤 12641
ORA-12641: 驗證服務無法初始化
IMP-00000: 未成功終止匯入

解決辦法：

開啟 ORACLE 安裝目錄，我的是 D:\app\Administrator\product\11.2.0\dbhome_1\NETWORK\ADMIN

開啟檔案 sqlnet.ora

解決前檔案內容是：

# sqlnet.ora Network Configuration File: D:\app\Administrator\product\11.2.0\dbhome_1\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.

# This file is actually generated by netca. But if customers choose to 
# install "Software Only", this file wont exist and without the native 
# authentication, they will not be able to connect to the database on NT.

SQLNET.AUTHENTICATION_SERVICES= (NTS)

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

 修改檔案內容後解決！

# sqlnet.ora Network Configuration File: D:\app\Administrator\product\11.2.0\dbhome_1\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.

# This file is actually generated by netca. But if customers choose to 
# install "Software Only", this file wont exist and without the native 
# authentication, they will not be able to connect to the database on NT.

SQLNET.AUTHENTICATION_SERVICES= (NONE)

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)