SQLLDR file not able to modify in Linux

Hi All

I am trying to modifying SQLLDR file in Linux, I�m getting the below error

 
"counterparty.sqlldr" E506: Can't write to backup file (add ! to override)
Press ENTER or type command to continue

Can someone help me resove this issue.

Thank

The answer I suppose is what I see in the error message: add ! to override