C:\Users\shoaib>impdp system/oracle@orcl directory=prac network_link=sts remap_s
chema=roz:scott  dumpfile=SH.DMP

Import: Release 10.2.0.3.0 - Production on Tuesday, 30 September, 2014 12:53:08

Copyright (c) 2003, 2005, Oracle.  All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Produc
tion
With the Partitioning, OLAP and Data Mining options
ORA-39002: invalid operation
ORA-39070: Unable to open the log file.
ORA-39087: directory name PRAC is invalid

SQL> create public database link sts connect to roz identified by roz using 'lvorcl';

Database link created.

To change the default logon for the Oracle services, go to:
-> Control Panel
-> Services
-> OracleServiceXXXX (where XXXX is the instance name)
-> Startup
-> Log On As

Repeat this procedure for the TNS Listener:
-> Control Panel
-> Services
-> OracleXXXXTNSListener (where XXXX is the Oracle Home Name)
-> Startup
-> Log On As

C:\Users\Administrator>sqlplus

SQL*Plus: Release 11.2.0.1.0 Production on Fri Nov 20 15:48:13 2015

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

Enter user-name: test/test@testdb

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> create or replace directory NET_SHARE as '\\livedb\tso\exp';

Directory created.

-- here livedb its my live database hostname and tso its shared directory and exp its directory where i export my live database using expdp

[b]A directory object has to be created using UNC format to point to the shared directory:

create or replace directory NET_SHARE as '\\<machine name>\<share name>\<path>';

SQL> GRANT READ, WRITE ON DIRECTORY NET_SHARE to public;

Grant succeeded.

SQL> exit

Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64
bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

C:\Users\Administrator>expdp system/password@livedb schemas=scott directory=exp dumpfile=scott.dmp logfile=expdpscott.log

C:\Users\Administrator>impdp test/test@testdb schemas=scott directory=net_shar
e dumpfile=scott.dmp logfile=impscott.log