Check for file existance by mask

check_by_mask.sh

for f in /path/to/your/files*; do

    ## Check if the glob gets expanded to existing files.
    ## If not, f here will be exactly the pattern above
    ## and the exists test will evaluate to false.
    if [ -e "$f" ] then
      echo "Mask exists"
    fi 
    ## This is all we needed to know, so we can break after the first iteration
    break
done