lsw1
List windows
Usage
lsw [window ...]
Overview
lsw prints the title and XID of each child of each window. If none are given the root window is used.
Releases
10 releases since Debian 4.0 (Etch); the text changed 3 times.
-l until Debian 8 (Jessie);
-v until Debian 8 (Jessie).