sqlplus: error while loading shared libraries: libsqlplus.so: cannot open shared object file: No such file or directory

Problem:
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./sqlplus: error while loading shared libraries: libsqlplus.so: cannot open shared object file: No such file or directory



Solution:
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vi .bash_profile

export LD_LIBRARY_PATH=$ORACLE_HOME/lib

save and quit.

Then relogin

Problem will solve.