Error Segmentation Fault with sqlplus in Oracle
sqlplus / as sysdba
SQL*Plus: Release 18.104.22.168.0 Production on Thu Jul 3 15:33:53 2020
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Following are the solution, you can tried. If you want to know the exact cause then lock a ticket at Oracle Support.
Following are the hit/trial methods may or may not work:
1. Need to check the binaries and relink them all with RELINK commands:
$ORACLE_HOME/bin> relink all
2. Try to login with SUDO option
3. Check the limits parameter for the Oracle Software which you configured during the installation and match with installation document. Then try again.
-- Get list of parameters when set during installation as minimum requirement
4. The dump file is generated for the error. please check alert log directory or CDUMP location.