For 11.2g, it's ORA_NLS11.

ref: http://www.idevelopment.info/data/Oracle/DBA_tips/Unix/UNIX_4.shtml
It's Oracle 11, not 10.
init.ora that came with Oracle.

On Virtualbox, file was here:

/home/oracle/app/oracle/product/11.2.0/dbhome_2/dbs/init.ora
Sync with ACS admin notes.  Mostly.

Leave block size what Oracle used for it's Oracle Linux.
Guess it's standard to put sid in init filename.
Copy db init params up to server.