sub av_ssh
{

  $av_obj_SSH->trace(-1);
  $av_obj_SSH->debug(1);

  $av_obj_SSH->connect($av_loc_ROUTER)
    or $av_obj_SSH->die_with_error;

  $av_tmp_STRING = $av_obj_SSH->check_hostkey('ask')
    or $av_obj_SSH->die_with_error;
  
  $av_obj_SSH->auth_publickey("newroot","$ENV{HOME}/.ssh/t_zertifikat_t_test_openssh.pub","$ENV{HOME}/.ssh/t_zertifikat_t_test_openssh.key")
    or $av_obj_SSH->die_with_error;
  
  $av_obj_SSH->disconnect();
}


$av_obj_SSH = Net::SSH2->new()
 or die "SSH-Objekt konnte nicht erzeugt werden";

av_ssh();

exit (0);

##</code><code>##

la .ssh/
insgesamt 72
drwxrwxr-x  2 fxuser2 fxuser2 4096 Dez 12 15:45 .
drwxr-xr-x 14 fxuser2 fxuser2 4096 Dez 12 15:45 ..
-rw-------  1 fxuser2 fxuser2  381 Aug 31  2021 authorized_keys
-rw-------  1 fxuser2 fxuser2 3434 Aug 31  2021 id_rsa
-rw-r--r--  1 fxuser2 fxuser2  742 Aug 31  2021 id_rsa.pub
-rw-------  1 fxuser2 fxuser2  182 Dez 12 15:46 known_hosts
-rw-------  1 fxuser2 fxuser2 1834 Dez 12 12:59 t_zertifikat_t_test_openssh.key
-rw-------  1 fxuser2 fxuser2  406 Dez 12 12:53 t_zertifikat_t_test_openssh.pub