what is this for appimage

1$ chmod a+x filename.AppImage

1$ chmod a+x filename.AppImage
2$ ./filename.AppImage

1/** High resolution open source images stocks**/
2https://unsplash.com/images/stock/high-resolution
3https://www.pexels.com/search/high%20resolution/
4https://www.stockphotosecrets.com/questions-answers/technical/how-can-i-get-a-higher-resolution-of-an-image.html
5https://www.shutterstock.com/search/high+resolution
6https://gratisography.com/
7https://www.techsmith.com/blog/what-is-hi-res/
8https://burst.shopify.com/
9https://pixabay.com/images/search/high%20resolution/