/usr/lib/rbenv/libexec/rbenv-version is in rbenv 1.0.0-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | #!/usr/bin/env bash
# Summary: Show the current Ruby version and its origin
#
# Shows the currently selected Ruby version and how it was
# selected. To obtain only the version string, use `rbenv
# version-name'.
set -e
[ -n "$RBENV_DEBUG" ] && set -x
echo "$(rbenv-version-name) (set by $(rbenv-version-origin))"
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