Create a photo collage using a single command-line

In order to create a contact-sheet or a collage of many files under linux, I prefer to use a single command-line. I create a directory with all the images and use ImageMagick montage function:

montage -font Arial-Narrow -pointsize 10 -label '%t' -resize 100x150 *.jpg -geometry +3+3 -tile 4x4 -shadow collage.jpg