This file is indexed.

/usr/bin/fv is in ftools-fv 5.4+dfsg-4.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/bin/sh
export FITSVIEWER_LIBRARY=/usr/share/ftools/fv
export FV_HELPDIR=/usr/share/doc/ftools-fv/doc
export XLIB_SKIP_ARGB_VISUALS=1
exec wish $FITSVIEWER_LIBRARY/fvInit.tcl -- "$@"