/usr/lib/rbenv/libexec/rbenv-sh-rehash is in rbenv 0.4.0+debian1-3.
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 12 13 | #!/usr/bin/env bash
set -e
[ -n "$RBENV_DEBUG" ] && set -x
# Provide rbenv completions
if [ "$1" = "--complete" ]; then
exec rbenv-rehash --complete
fi
# When rbenv shell integration is enabled, delegate to rbenv-rehash,
# then tell the shell to empty its command lookup cache.
rbenv-rehash
echo "hash -r"
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