I can't use sqlplus in Unix as a normal user. It gives the below error. My oracle home is /usr/local/oracle/product/10.2.0.3 Kindly suggest bash#/usr/local/oracle/product/10.2.0.3/bin> sqlplus Error 6 initializing SQL*Plus Message file sp1<lang>.msb not found SP2-0750: You may need to set ORACLE_HOME to your Oracle software directory bash#/usr/local/oracle/product/10.2.0.3/bin> env | grep ORACLE_HOME ORACLE_HOME=/usr/local/oracle/product/10.2.0.3