[ralph]

find(1) has an -ls built-in, thought the format is slightly different. You can also use -printf to suit. Also, later GNU finds make some uses of xargs unnecessary.

    find -type f -exec ls -ltr {} +

[agumonkey]

That made me read about `+` accumulation, happy day.

[sefk]

I didn't know about + either -- neato! Thanks.