On a Debian system, one can type
pager in order to use whatever pager program happens to be default/available. By default,
less is used, and if not available, the lesser
more gets to do the job. Is such a thing available in other Unix and Linux systems?
The unix tradition is for applications that want to call a pager to call
Having a command named
Debian also provides
$ update-alternatives --list pager /bin/less /bin/more /usr/bin/pg /usr/bin/w3m
YMMV depending on what you have installed, but this is Debian-specific (well, and derivatives too).
Customarily one uses
All Linux-Distributions I have used so far (Gentoo, Debian, Slackware, Fedora, OpenSuse) had an Environment-Variable called PAGER which set the pager (default, as said, less).
It's set in your shell environment.