Use of special characters of Oracle passwords in sqlplus, IMP, AND EXP

Assume that the database network connection string is db_wending, the password is DBA/123, @ lk.com Sqlplus (the password is enclosed in a pair of double quotation marks ): SQL> alter user u_test identified by "DBAs/123, @ lk.com "; SQL> conn u_test/"DBAs/123, @ lk.com" @ db_wending In Linux (the password is enclosed by a pair of double quotes, and the overall userid is enclosed by a pair of single quotes ): $ Exp 'U _ test/"DBA/123, @ lk.com" @ db_wending 'file = u_test.dmp buffer = 4096000 In Windows (the password is enclosed by three double quotation marks ): D: \> exp u_test/"DBA/123, @ lk.com" @ db_wending file = u_test.dmp buffer = 4096000