374
374
#: random-bits.xml:223
376
msgid "By default the installer will install the GNOME desktop environment, but alternative desktop environments can be selected either by using one of the special CD images, or by specifying the desired desktop environment when the installer is booted (see <xref linkend=\"pkgsel\"/>)."
380
#: random-bits.xml:230
376
382
msgid "Note that you will need to add the sizes listed in the table to the size of the standard installation when determining the size of partitions. Most of the size listed as <quote>Installed size</quote> will end up in <filename>/usr</filename> and in <filename>/lib</filename>; the size listed as <quote>Download size</quote> is (temporarily) required in <filename>/var</filename>."
380
#: random-bits.xml:237
386
#: random-bits.xml:244
386
#: random-bits.xml:238
392
#: random-bits.xml:245
388
394
msgid "Installed size (MB)"
392
#: random-bits.xml:239
398
#: random-bits.xml:246
394
400
msgid "Download size (MB)"
398
#: random-bits.xml:240
404
#: random-bits.xml:247
400
406
msgid "Space needed to install (MB)"
404
#: random-bits.xml:246
410
#: random-bits.xml:253
406
412
msgid "Desktop environment"
410
#: random-bits.xml:247
412
msgid "&task-desktop-inst;"
416
#: random-bits.xml:248
418
msgid "&task-desktop-dl;"
422
#: random-bits.xml:249
424
msgid "&task-desktop-tot;"
428
#: random-bits.xml:253
416
#: random-bits.xml:254 random-bits.xml:255 random-bits.xml:256
422
#: random-bits.xml:259
424
msgid " • GNOME (default)"
428
#: random-bits.xml:260
430
msgid "&task-desktop-gnome-inst;"
434
#: random-bits.xml:261
436
msgid "&task-desktop-gnome-dl;"
440
#: random-bits.xml:262
442
msgid "&task-desktop-gnome-tot;"
446
#: random-bits.xml:265
448
msgid " • KDE"
452
#: random-bits.xml:266
454
msgid "&task-desktop-kde-inst;"
458
#: random-bits.xml:267
460
msgid "&task-desktop-kde-dl;"
464
#: random-bits.xml:268
466
msgid "&task-desktop-kde-tot;"
470
#: random-bits.xml:271
472
msgid " • Xfce"
476
#: random-bits.xml:272
478
msgid "&task-desktop-xfce-inst;"
482
#: random-bits.xml:273
484
msgid "&task-desktop-xfce-dl;"
488
#: random-bits.xml:274
490
msgid "&task-desktop-xfce-tot;"
494
#: random-bits.xml:277
496
msgid " • LXDE"
500
#: random-bits.xml:278
502
msgid "&task-desktop-lxde-inst;"
506
#: random-bits.xml:279
508
msgid "&task-desktop-lxde-dl;"
512
#: random-bits.xml:280
514
msgid "&task-desktop-lxde-tot;"
518
#: random-bits.xml:284
434
#: random-bits.xml:255
524
#: random-bits.xml:286
436
526
msgid "There is some overlap of the Laptop task with the Desktop environment task. If you install both, the Laptop task will only require a few MB additional disk space."
440
#: random-bits.xml:262
530
#: random-bits.xml:293
442
532
msgid "&task-laptop-inst;"
446
#: random-bits.xml:263
536
#: random-bits.xml:294
448
538
msgid "&task-laptop-dl;"
452
#: random-bits.xml:264
542
#: random-bits.xml:295
454
544
msgid "&task-laptop-tot;"
458
#: random-bits.xml:268
548
#: random-bits.xml:299
460
550
msgid "Web server"
464
#: random-bits.xml:269
554
#: random-bits.xml:300
466
556
msgid "&task-web-inst;"
470
#: random-bits.xml:270
560
#: random-bits.xml:301
472
562
msgid "&task-web-dl;"
476
#: random-bits.xml:271
566
#: random-bits.xml:302
478
568
msgid "&task-web-tot;"
482
#: random-bits.xml:275
572
#: random-bits.xml:306
484
574
msgid "Print server"
488
#: random-bits.xml:276
578
#: random-bits.xml:307
490
580
msgid "&task-print-inst;"
494
#: random-bits.xml:277
584
#: random-bits.xml:308
496
586
msgid "&task-print-dl;"
500
#: random-bits.xml:278
590
#: random-bits.xml:309
502
592
msgid "&task-print-tot;"
506
#: random-bits.xml:282
596
#: random-bits.xml:313
508
598
msgid "DNS server"
512
#: random-bits.xml:283
602
#: random-bits.xml:314
514
604
msgid "&task-dns-inst;"
518
#: random-bits.xml:284
608
#: random-bits.xml:315
520
610
msgid "&task-dns-dl;"
524
#: random-bits.xml:285
614
#: random-bits.xml:316
526
616
msgid "&task-dns-tot;"
530
#: random-bits.xml:289
620
#: random-bits.xml:320
532
622
msgid "File server"
536
#: random-bits.xml:290
626
#: random-bits.xml:321
538
628
msgid "&task-file-inst;"
542
#: random-bits.xml:291
632
#: random-bits.xml:322
544
634
msgid "&task-file-dl;"
548
#: random-bits.xml:292
638
#: random-bits.xml:323
550
640
msgid "&task-file-tot;"
554
#: random-bits.xml:296
644
#: random-bits.xml:327
556
646
msgid "Mail server"
560
#: random-bits.xml:297
650
#: random-bits.xml:328
562
652
msgid "&task-mail-inst;"
566
#: random-bits.xml:298
656
#: random-bits.xml:329
568
658
msgid "&task-mail-dl;"
572
#: random-bits.xml:299
662
#: random-bits.xml:330
574
664
msgid "&task-mail-tot;"
578
#: random-bits.xml:303
668
#: random-bits.xml:334
580
670
msgid "SQL database"
584
#: random-bits.xml:304
674
#: random-bits.xml:335
586
676
msgid "&task-sql-inst;"
590
#: random-bits.xml:305
680
#: random-bits.xml:336
592
682
msgid "&task-sql-dl;"
596
#: random-bits.xml:306
686
#: random-bits.xml:337
598
688
msgid "&task-sql-tot;"
602
#: random-bits.xml:312
604
msgid "The <emphasis>Desktop</emphasis> task will install the GNOME desktop environment."
608
#: random-bits.xml:319
692
#: random-bits.xml:343
610
694
msgid "If you install in a language other than English, <command>tasksel</command> may automatically install a <firstterm>localization task</firstterm>, if one is available for your language. Space requirements differ per language; you should allow up to 350MB in total for download and installation."
614
#: random-bits.xml:334
698
#: random-bits.xml:358
616
700
msgid "Installing &debian; from a Unix/Linux System"
620
#: random-bits.xml:336
704
#: random-bits.xml:360
622
706
msgid "This section explains how to install &debian; from an existing Unix or Linux system, without using the menu-driven installer as explained in the rest of the manual. This <quote>cross-install</quote> HOWTO has been requested by users switching to &debian; from Red Hat, Mandrake, and SUSE. In this section some familiarity with entering *nix commands and navigating the file system is assumed. In this section, <prompt>$</prompt> symbolizes a command to be entered in the user's current system, while <prompt>#</prompt> refers to a command entered in the Debian chroot."
626
#: random-bits.xml:348
710
#: random-bits.xml:372
628
712
msgid "Once you've got the new Debian system configured to your preference, you can migrate your existing user data (if any) to it, and keep on rolling. This is therefore a <quote>zero downtime</quote> &debian; install. It's also a clever way for dealing with hardware that otherwise doesn't play friendly with various boot or installation media."
632
#: random-bits.xml:359
716
#: random-bits.xml:383
634
718
msgid "As this is a mostly manual procedure, you should bear in mind that you will need to do a lot of basic configuration of the system yourself, which will also require more knowledge of Debian and of Linux in general than performing a regular installation. You cannot expect this procedure to result in a system that is identical to a system from a regular installation. You should also keep in mind that this procedure only gives the basic steps to set up a system. Additional installation and/or configuration steps may be needed."
638
#: random-bits.xml:373
722
#: random-bits.xml:397
640
724
msgid "Getting Started"
644
#: random-bits.xml:374
728
#: random-bits.xml:398
646
730
msgid "With your current *nix partitioning tools, repartition the hard drive as needed, creating at least one filesystem plus swap. You need around 350MB of space available for a console only install, or about 1GB if you plan to install X (more if you intend to install desktop environments like GNOME or KDE)."
650
#: random-bits.xml:382
734
#: random-bits.xml:406
653
737
"Next, create file systems on the partitions. For example, to create an ext3 file system on partition <filename>/dev/hda6</filename> (that's our example root partition): <informalexample><screen>\n"
715
#: random-bits.xml:469
799
#: random-bits.xml:493
717
801
msgid "Run <command>debootstrap</command>"
721
#: random-bits.xml:470
805
#: random-bits.xml:494
723
msgid "<command>debootstrap</command> can download the needed files directly from the archive when you run it. You can substitute any Debian archive mirror for <userinput>&archive-mirror;/debian</userinput> in the command example below, preferably a mirror close to you network-wise. Mirrors are listed at <ulink url=\"http://www.debian.org/misc/README.mirrors\"></ulink>."
807
msgid "<command>debootstrap</command> can download the needed files directly from the archive when you run it. You can substitute any Debian archive mirror for <userinput>&archive-mirror;/debian</userinput> in the command example below, preferably a mirror close to you network-wise. Mirrors are listed at <ulink url=\"http://www.debian.org/mirror/list\"></ulink>."
727
#: random-bits.xml:479
811
#: random-bits.xml:503
729
813
msgid "If you have a &releasename; &debian; CD mounted at <filename>/cdrom</filename>, you could substitute a file URL instead of the http URL: <userinput>file:/cdrom/debian/</userinput>"
733
#: random-bits.xml:485
817
#: random-bits.xml:509
735
819
msgid "Substitute one of the following for <replaceable>ARCH</replaceable> in the <command>debootstrap</command> command: <userinput>alpha</userinput>, <userinput>amd64</userinput>, <userinput>arm</userinput>, <userinput>armel</userinput>, <userinput>hppa</userinput>, <userinput>i386</userinput>, <userinput>ia64</userinput>, <userinput>m68k</userinput>, <userinput>mips</userinput>, <userinput>mipsel</userinput>, <userinput>powerpc</userinput>, <userinput>s390</userinput>, or <userinput>sparc</userinput>."
739
#: random-bits.xml:504
823
#: random-bits.xml:528
742
826
"# /usr/sbin/debootstrap --arch ARCH &releasename; \\\n"
1158
#: random-bits.xml:834
1243
#: random-bits.xml:858
1160
1245
msgid "After the installation there will be a lot of downloaded packages in <filename>/var/cache/apt/archives/</filename>. You can free up some diskspace by running:"
1164
#: random-bits.xml:840
1249
#: random-bits.xml:864
1166
1251
msgid "# aptitude clean"
1170
#: random-bits.xml:851
1255
#: random-bits.xml:875
1172
1257
msgid "Installing &debian; over Parallel Line IP (PLIP)"
1176
#: random-bits.xml:853
1261
#: random-bits.xml:877
1178
1263
msgid "This section explains how to install &debian; on a computer without an Ethernet card, but with just a remote gateway computer attached via a Null-Modem cable (also called Null-Printer cable). The gateway computer should be connected to a network that has a Debian mirror on it (e.g. to the Internet)."
1182
#: random-bits.xml:861
1267
#: random-bits.xml:885
1184
1269
msgid "In the example in this appendix we will set up a PLIP connection using a gateway connected to the Internet over a dial-up connection (ppp0). We will use IP addresses 192.168.0.1 and 192.168.0.2 for the PLIP interfaces on the target system and the source system respectively (these addresses should be unused within your network address space)."
1188
#: random-bits.xml:869
1273
#: random-bits.xml:893
1190
1275
msgid "The PLIP connection set up during the installation will also be available after the reboot into the installed system (see <xref linkend=\"boot-new\"/>)."
1194
#: random-bits.xml:874
1279
#: random-bits.xml:898
1196
1281
msgid "Before you start, you will need to check the BIOS configuration (IO base address and IRQ) for the parallel ports of both the source and target systems. The most common values are <literal>io=0x378</literal>, <literal>irq=7</literal>."
1200
#: random-bits.xml:884
1285
#: random-bits.xml:908
1202
1287
msgid "Requirements"
1206
#: random-bits.xml:887
1291
#: random-bits.xml:911
1208
1293
msgid "A target computer, called <emphasis>target</emphasis>, where Debian will be installed."
1212
#: random-bits.xml:893
1297
#: random-bits.xml:917
1214
1299
msgid "System installation media; see <xref linkend=\"installation-media\"/>."
1218
#: random-bits.xml:898
1303
#: random-bits.xml:922
1220
1305
msgid "Another computer connected to the Internet, called <emphasis>source</emphasis>, that will function as the gateway."
1224
#: random-bits.xml:904
1309
#: random-bits.xml:928
1226
1311
msgid "A DB-25 Null-Modem cable. See the <ulink url=\"&url-plip-install-howto;\">PLIP-Install-HOWTO</ulink> for more information on this cable and instructions how to make your own."
1230
#: random-bits.xml:916
1315
#: random-bits.xml:940
1232
1317
msgid "Setting up source"
1236
#: random-bits.xml:917
1321
#: random-bits.xml:941
1238
1323
msgid "The following shell script is a simple example of how to configure the source computer as a gateway to the Internet using ppp0."
1242
#: random-bits.xml:922
1327
#: random-bits.xml:946
1277
1362
#. Tag: guimenuitem
1278
#: random-bits.xml:948
1363
#: random-bits.xml:972
1280
1365
msgid "Load installer components from CD"
1284
#: random-bits.xml:950
1369
#: random-bits.xml:974
1286
1371
msgid "Select the <userinput>plip-modules</userinput> option from the list; this will make the PLIP drivers available to the installation system."
1289
1374
#. Tag: guimenuitem
1290
#: random-bits.xml:958
1375
#: random-bits.xml:982
1292
1377
msgid "Detect network hardware"
1296
#: random-bits.xml:963
1381
#: random-bits.xml:987
1298
1383
msgid "If target <emphasis>does</emphasis> have a network card, a list of driver modules for detected cards will be shown. If you want to force &d-i; to use plip instead, you have to deselect all listed driver modules. Obviously, if target doesn't have a network card, the installer will not show this list."
1302
#: random-bits.xml:972
1387
#: random-bits.xml:996
1304
1389
msgid "Because no network card was detected/selected earlier, the installer will ask you to select a network driver module from a list. Select the <userinput>plip</userinput> module."
1307
1392
#. Tag: guimenuitem
1308
#: random-bits.xml:984
1393
#: random-bits.xml:1008
1310
1395
msgid "Configure the network"
1314
#: random-bits.xml:987
1399
#: random-bits.xml:1011
1316
1401
msgid "Auto-configure network with DHCP: No"
1320
#: random-bits.xml:992
1405
#: random-bits.xml:1016
1322
1407
msgid "IP address: <userinput><replaceable>192.168.0.1</replaceable></userinput>"
1326
#: random-bits.xml:997
1411
#: random-bits.xml:1021
1328
1413
msgid "Point-to-point address: <userinput><replaceable>192.168.0.2</replaceable></userinput>"
1332
#: random-bits.xml:1003
1417
#: random-bits.xml:1027
1334
1419
msgid "Name server addresses: you can enter the same addresses used on source (see <filename>/etc/resolv.conf</filename>)"
1338
#: random-bits.xml:1022
1423
#: random-bits.xml:1046
1340
1425
msgid "Installing &debian; using PPP over Ethernet (PPPoE)"
1344
#: random-bits.xml:1024
1429
#: random-bits.xml:1048
1346
1431
msgid "In some countries PPP over Ethernet (PPPoE) is a common protocol for broadband (ADSL or cable) connections to an Internet Service Provider. Setting up a network connection using PPPoE is not supported by default in the installer, but can be made to work very simply. This section explains how."
1350
#: random-bits.xml:1032
1435
#: random-bits.xml:1056
1352
1437
msgid "The PPPoE connection set up during the installation will also be available after the reboot into the installed system (see <xref linkend=\"boot-new\"/>)."
1356
#: random-bits.xml:1037
1441
#: random-bits.xml:1061
1358
1443
msgid "To have the option of setting up and using PPPoE during the installation, you will need to install using one of the CD-ROM/DVD images that are available. It is not supported for other installation methods (e.g. netboot<phrase condition=\"supports-floppy-boot\"> or floppy</phrase>)."
1362
#: random-bits.xml:1044
1447
#: random-bits.xml:1068
1364
1449
msgid "Installing over PPPoE is mostly the same as any other installation. The following steps explain the differences."
1368
#: random-bits.xml:1052
1453
#: random-bits.xml:1076
1371
"Boot the installer with <userinput>modules=ppp-udeb</userinput> as boot parameter. This means that at the boot prompt you should enter: <informalexample><screen>\n"
1372
"install modules=ppp-udeb\n"
1373
"</screen></informalexample> or, if you prefer using the graphical installer: <informalexample><screen>\n"
1374
"installgui modules=ppp-udeb\n"
1375
"</screen></informalexample> This will ensure the component responsible for the setup of PPPoE (<classname>ppp-udeb</classname>) will be loaded and run automatically."
1455
msgid "Boot the installer with the boot parameter <userinput>modules=ppp-udeb</userinput><footnote arch=\"x86\"> <para> See <xref linkend=\"boot-screen\"/> for information on how to add a boot parameter. </para> </footnote>. This will ensure the component responsible for the setup of PPPoE (<classname>ppp-udeb</classname>) will be loaded and run automatically."
1379
#: random-bits.xml:1067
1459
#: random-bits.xml:1091
1381
1461
msgid "Follow the regular initial steps of the installation (language, country and keyboard selection; the loading of additional installer components<footnote> <para> The <classname>ppp-udeb</classname> component is loaded as one of the additional components in this step. If you want to install at medium or low priority (expert mode), you can also manually select the <classname>ppp-udeb</classname> instead of entering the <quote>modules</quote> parameter at the boot prompt. </para> </footnote>)."
1385
#: random-bits.xml:1086
1465
#: random-bits.xml:1110
1387
1467
msgid "The next step is the detection of network hardware, in order to identify any Ethernet cards present in the system."
1391
#: random-bits.xml:1092
1471
#: random-bits.xml:1116
1393
1473
msgid "After this the actual setup of PPPoE is started. The installer will probe all the detected Ethernet interfaces in an attempt to find a PPPoE concentrator (a type of server which handles PPPoE connections)."
1397
#: random-bits.xml:1098
1477
#: random-bits.xml:1122
1399
1479
msgid "It is possible that the concentrator will not to be found at the first attempt. This can happen occasionally on slow or loaded networks or with faulty servers. In most cases a second attempt to detect the concentrator will be successful; to retry, select <guimenuitem>Configure and start a PPPoE connection</guimenuitem> from the main menu of the installer."
1403
#: random-bits.xml:1107
1483
#: random-bits.xml:1131
1405
1485
msgid "After a concentrator is found, the user will be prompted to type the login information (the PPPoE username and password)."
1409
#: random-bits.xml:1113
1489
#: random-bits.xml:1137
1411
1491
msgid "At this point the installer will use the provided information to establish the PPPoE connection. If the correct information was provided, the PPPoE connection should be configured and the installer should be able to use it to connect to the Internet and retrieve packages over it (if needed). If the login information is not correct or some error appears, the installer will stop, but the configuration can be attempted again by selecting the menu entry <guimenuitem>Configure and start a PPPoE connection</guimenuitem>."
1415
#: random-bits.xml:1133
1495
#: random-bits.xml:1157
1417
1497
msgid "The Graphical Installer"
1421
#: random-bits.xml:1134
1501
#: random-bits.xml:1158
1423
1503
msgid "The graphical version of the installer is only available for a limited number of architectures, including &arch-title;. The functionality of the graphical installer is essentially the same as that of the regular installer as it basically uses the same programs, but with a different frontend."
1427
#: random-bits.xml:1142
1507
#: random-bits.xml:1166
1429
1509
msgid "Although the functionality is identical, the graphical installer still has a few significant advantages. The main advantage is that it supports more languages, namely those that use a character set that cannot be displayed with the regular <quote>newt</quote> frontend. It also has a few usability advantages such as the option to use a mouse, and in some cases several questions can be displayed on a single screen."
1433
#: random-bits.xml:1151
1513
#: random-bits.xml:1175
1435
1515
msgid "The graphical installer is available with all CD images and with the hd-media installation method. To boot the graphical installer simply select the relevant option from the boot menu. Expert and rescue mode for the graphical installer can be selected from the <quote>Advanced options</quote> menu. The previously used boot methods <userinput>installgui</userinput>, <userinput>expertgui</userinput> and <userinput>rescuegui</userinput> can still be used from the boot prompt which is shown after selecting the <quote>Help</quote> option in the boot menu."
1439
#: random-bits.xml:1162
1519
#: random-bits.xml:1186
1441
1521
msgid "There is also a graphical installer image that can be netbooted. And there is a special <quote>mini</quote> ISO image<footnote id=\"gtk-miniiso\"> <para> The mini ISO image can be downloaded from a Debian mirror as described in <xref linkend=\"downloading-files\"/>. Look for <filename>netboot/gtk/mini.iso</filename>. </para> </footnote>, which is mainly useful for testing."
1445
#: random-bits.xml:1175
1525
#: random-bits.xml:1199
1447
1527
msgid "For &arch-title;, currently only an experimental <quote>mini</quote> ISO image is available<footnote id=\"gtk-miniiso\"> <para> The mini ISO image can be downloaded from a Debian mirror as described in <xref linkend=\"downloading-files\"/>. Look for <filename>netboot/gtk/mini.iso</filename>. </para> </footnote>. It should work on almost all PowerPC systems that have an ATI graphical card, but is unlikely to work on other systems."
1451
#: random-bits.xml:1189
1531
#: random-bits.xml:1213
1453
msgid "Just as with the regular installer it is possible to add boot parameters when starting the graphical installer. One of those parameters allows to configure the mouse for left-handed use. Others allow to select the mouse device (e.g. for a serial mouse) and the mouse protocol. See <xref linkend=\"boot-parms\"/> for valid parameters<phrase arch=\"x86\"> and <xref linkend=\"boot-screen\"/> for information on how to pass them</phrase>."
1533
msgid "Just as with the regular installer it is possible to add boot parameters when starting the graphical installer."
1457
#: random-bits.xml:1199
1537
#: random-bits.xml:1219
1459
1539
msgid "The graphical installer requires significantly more memory to run than the regular installer: &minimum-memory-gtk;. If insufficient memory is available, it will automatically fall back to the regular <quote>newt</quote> frontend."
1463
#: random-bits.xml:1206
1543
#: random-bits.xml:1226
1465
1545
msgid "If the amount of memory in your system is below &minimum-memory;, the graphical installer may fail to boot at all while booting the regular installer would still work. Using the regular installer is recommended for systems with little available memory."
1469
#: random-bits.xml:1216
1549
#: random-bits.xml:1236
1471
1551
msgid "Using the graphical installer"
1475
#: random-bits.xml:1217
1555
#: random-bits.xml:1237
1477
1557
msgid "As already mentioned, the graphical installer basically works the same as the regular installer and thus the rest of this manual can be used to guide you through the installation process."
1481
#: random-bits.xml:1223
1561
#: random-bits.xml:1243
1483
1563
msgid "If you prefer using the keyboard over the mouse, there are two things you need to know. To expand a collapsed list (used for example for the selection of countries within continents), you can use the <keycap>+</keycap> and <keycap>-</keycap> keys. For questions where more than one item can be selected (e.g. task selection), you first need to tab to the &BTN-CONT; button after making your selections; hitting enter will toggle a selection, not activate &BTN-CONT;."
1487
#: random-bits.xml:1233
1567
#: random-bits.xml:1253
1569
msgid "If a dialog offers additional help information, a <guibutton>Help</guibutton> button will be displayed. The help information can be accessed either by activating the button or by pressing the <keycap>F1</keycap> key."
1573
#: random-bits.xml:1259
1489
1575
msgid "To switch to another console, you will also need to use the <keycap>Ctrl</keycap> key, just as with the X Window System. For example, to switch to VT2 (the first debug shell) you would use: <keycombo> <keycap>Ctrl</keycap> <keycap>Left Alt</keycap> <keycap>F2</keycap> </keycombo>. The graphical installer itself runs on VT5, so you can use <keycombo> <keycap>Left Alt</keycap> <keycap>F5</keycap> </keycombo> to switch back."
1493
#: random-bits.xml:1247
1495
msgid "Known issues"
1499
#: random-bits.xml:1248
1501
msgid "The graphical frontend to the installer is relatively new and because of that there are some known issues. We continue to work on resolving these."
1505
#: random-bits.xml:1256
1507
msgid "Information on some screens is not yet nicely formatted into columns as it should be."
1511
#: random-bits.xml:1262
1513
msgid "Support for touchpads is not yet optimal."