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RMAN connection error

I have just installed Oracle 9.2 on Red Hat Enterprise Linux. Everything is working perfectly except RMAN. When I write "rman" and press enter it hangs. If I write "rman connect target /" it gives an error saying "can't open connect," though my database is up and working fine in an adjacent window.

I have just installed Oracle 9.2 on Red Hat Enterprise Linux. Everything is working perfectly except RMAN. When I write "rman" and press enter it hangs. If I write "rman connect target /" it gives an error saying "can't open connect," though my database is up and working fine in an adjacent window. Please help.
This behavior is caused by having two RMAN executables on your system. When you provide the entire path (e.g., $ORACLE_HOME/bin/rman), does it work? Another test is to type:

which rman

If it returns something other than rman located in $ORACLE_HOME/bin, then it's probably trying to execute the other rman executable because it appears first in your path.

To use RMAN, you can either provide the entire path or you can modify your path to ensure that the correct rman executable (in your ORACLE_HOME) is found first.

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