Sqlplus Error 57 Initializing Sql-plus Error Loading Message Shared Library «Popular ⇒»

ls -l $ORACLE_HOME/lib/libsqlplus.so

Ensure your user has read and execute permissions (-rwxr-xr-x or at least r-x).

Fix if needed:

chmod 755 $ORACLE_HOME/lib/libsqlplus.so

export ORACLE_HOME=/u01/app/oracle/product/12.1.0/dbhome_1
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH
export PATH=$ORACLE_HOME/bin:$PATH

If libraries were recently patched or OS packages were updated, the Oracle binary might need to be re-linked. ls -l $ORACLE_HOME/lib/libsqlplus

Action: Shut down the database and listener, then run the relink utility as the oracle user: Ensure your user has read and execute permissions

cd $ORACLE_HOME/bin
./relink all