I tried to use the SHRED command in Linux to destroy an encrypted Writer file, but I got this message:
Document file 'xxx.odt' is locked for editing by:
Unknown User
Open document read-only or open a copy of the document for editing.
The file seems to have set itself for read-only; I don’t remember doing it.
How do I get rid of the read-only restriction so I can shred the file?