If available, \fB/usr/bin/dialog\fP is the default. If it is not
available but \fB/usr/bin/whiptail\fP is installed, then this is
used instead. If nothing else works, we'll fall back to \fBplain\fP.
If available, \fB/usr/bin/dialog\fP is the default. If it is not
available but \fB/usr/bin/whiptail\fP is installed, then this is
used instead. If nothing else works, we'll fall back to \fBplain\fP.