Ranger is advanced file manager (like mc, Nautilus, Total Commander, …) but it uses key bindings and shortcuts like vim. It is in Debian’s repositories.

fzf (command-line fuzzy finder) is tool for searching files and directories. You can download it from github.com/junegunn/fzf

For integration create (or open) file ~/.config/ranger/commands.py and add function fzf_select. All file should looks like this:

from ranger.api.commands import Command


class fzf_select(Command):
    """
    :fzf_select

    Find a file using fzf.

    With a prefix argument select only directories.

    See: https://github.com/junegunn/fzf
    """
    def execute(self):
        import subprocess
        import os.path
        fzf = self.fm.execute_command("fzf +m", universal_newlines=True, stdout=subprocess.PIPE)
        stdout, stderr = fzf.communicate()
        if fzf.returncode == 0:
            fzf_file = os.path.abspath(stdout.rstrip('\n'))
            if os.path.isdir(fzf_file):
                self.fm.cd(fzf_file)
            else:
                self.fm.select_file(fzf_file)

Then restart ranger and type :fzf_select and start using fzf in ranger.