I have name filehua.txthai.txtifprint ls *{hua,las}* > taka.txt in taka.txt returnls hua.txt *las*i want to *las* not there,i just want in taka.txtls hua.txtand filter *{hua,las}* must there... tooplease help 
How to print list filename using ls, but if not found retrun empty string?
shell;ls;wildcards