code: def write_sources_list_content(content, filename='ceph.list', mode=0o644):
      
      repo_path = os.path.join('/etc/apt/sources.list.d', filename)
      if not isinstance(content, str):
          content = content.decode('utf-8')
      write_file(repo_path, content.encode('utf-8'), mode)
docs: add deb repo to /etc/apt/sources.list.d/ from content