-since option for ls -lt

[bob desinger]

Steve Summit (scs at athena.mit.edu) writes:
> 2.	There are (probably nonstandard) versions of test that can do
>	test file1 -nt file2
>	test file1 -ot file2
> ("newer than" and "older than").

The Korn shell has this.  `test' is a built-in command to ksh.