newer (1) Linux Manual Page
NAME
newer – compare file modification times
SYNOPSIS
newer [option] src1 [ src2 … srcN ] target
DESCRIPTION
Exit successfully if files src1 … srcN exist and at least one of them is not older than target. Also exit successfully if target doesn’t exist.
OPTIONS
newer accepts the following options:
–help- Print help message and exit.
–quiet, -q- Do not print any output, including error messages.
–version- Print version information and exit.
–verbose, -v- List missing source files. This is the default.