On 2025-10-30 17:39:33 +0000, alain williams wrote: > There was complaint about an option 'K' in the error message, try: > > ls -- *.pdf | grep K That's a strange use of grep. Simpler: ls -- *K*.pdf -- Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)