Display the SQL statement that a Linux Process is Executing

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-- get the process id from Linux (use top or ps)
-- the process id is spid in v$process
select sql_id from v$session where paddr in (select addr from v$process where spid in (4567))

-- put the sql_id from v$session into v$sqlarea/v$sql_text/v$sql
select sql_text from v$sqlarea where sql_id = 'ap3qms77rt67k'
-- this will display the sql that the process is executing

-- In one query
select sql_text
from v$sqlarea
where sql_id = 
(select sql_id from 
 v$session where paddr in 
 (select addr from v$process where spid = 1820)
);