This issue is related environment variable. Please fix them using the following.
[ggate@dbadm01 oradb11]$ ./ggsci ./ggsci: error while loading shared libraries: libnnz11.so: cannot open shared object file: No such file or directory export LD_LIBRARY_PATH=/u01/app/oracle/product/11.2.0.4a/dbhome_1/lib [ggate@dm02dbadm01 oradb11]$ export LD_LIBRARY_PATH=/u01/app/oracle/product/11.2.0.4a/dbhome_1/lib [ggate@dm02dbadm01 oradb11]$ ./ggsci Oracle GoldenGate Command Interpreter for Oracle Version 12.2.0.1.1 OGGCORE_12.2.0.1.0_PLATFORMS_151211.1401_FBO Linux, x64, 64bit (optimized), Oracle 11g on Dec 12 2015 00:54:38 Operating system character set identified as UTF-8. Copyright (C) 1995, 2015, Oracle and/or its affiliates. All rights reserved. GGSCI (dm02dbadm01.abcfinancial.net) 1>
or
[ggate@dm02dbadm01 oradb11]$ ln -s /u01/app/oracle/product/11.2.0.4a/dbhome_1/lib/libnnz11.so libnnz11.so [ggate@dm02dbadm01 oradb11]$ ./ggsci Oracle GoldenGate Command Interpreter for Oracle Version 12.2.0.1.1 OGGCORE_12.2.0.1.0_PLATFORMS_151211.1401_FBO Linux, x64, 64bit (optimized), Oracle 11g on Dec 12 2015 00:54:38 Operating system character set identified as UTF-8. Copyright (C) 1995, 2015, Oracle and/or its affiliates. All rights reserved. GGSCI (dm02dbadm01.abcfinancial.net) 1>