feh

TLDR

View images locally or using a URL

$ feh [path/to/images]

View images recursively

$ feh --recursive [path/to/images]

View images without window borders

$ feh --borderless [path/to/images]

Exit after the last image

$ feh --cycle-once [path/to/images]

Set the slideshow cycle delay

$ feh --slideshow-delay [seconds] [path/to/images]

Set your wallpaper (centered, filled, maximized, scaled or tiled)

$ feh --bg-[center|fill|max|scale|tile] [path/to/image]

Create a montage of all images within a directory. Outputs as a new image

$ feh --montage --thumb-height [150] --thumb-width [150] --index-info "[%nn%wx%h]" --output [path/to/montage_image.png]