Oracle 9i lock file (lkDBNAME)

Greetings,
Could you please give me some info on the $ORACLE_HOME/dbs/lkDBNAME ?
What is it used for? can we delete it or rename it?
Is it created automatically by the Oracle Instance upon startup?
What happens if the Instance is shut down?
Thanks.

t is a lock file use by the oracle background process. When an oracle instance starts, one of the background processes locks the file, by creating it first. This prevents a new background process from getting the lock. You are not suppossed to delete it or rename it.

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New information:
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Oracle 9i lock file (lkDBNAME)

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