$ sqlplus /nolog
SQL> connect /as sysdba;
Connected.
SQL> select * from v$version;
BANNER
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Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for
linux: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production