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Which SQL client and Linux version are we talking about?
Assuming you are using the Oracle sqlplus client... it does not support command line editing and history using the arrow keys. For this to work you will have to install a product called Readline Wrapper. See my answer at the General Database forum:
sqlplus command line editing
+... post moved from the Oracle Linux forum,+
to the SQL-and-PL/SQL forum for closer topic alignment.