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 732 <body class="manpage">
 733 <div id="header">
 734 <h1>
 735 syslinux(1) Manual Page
 736 </h1>
 737 <h2>NAME</h2>
 738 <div class="sectionbody">
 739 <p>syslinux -
 740    Install SYSLINUX to a file system
 741 </p>
 742 </div>
 743 </div>
 744 <div id="content">
 745 <div class="sect1">
 746 <h2 id="_synopsis">SYNOPSIS</h2>
 747 <div class="sectionbody">
 748 <div class="verseblock">
 749 <pre class="content"><strong>syslinux</strong> [<em>OPTIONS</em>] <em>DEVICE</em>
 750 <strong>extlinux</strong> [<em>OPTIONS</em>] <em>PATH</em>
 751 <strong>syslinux</strong> [-h | --help | -v | --version]
 752 <strong>extlinux</strong> [-h | --help | -v | --version]</pre>
 753 <div class="attribution">
 754 </div></div>
 755 </div>
 756 </div>
 757 <div class="sect1">
 758 <h2 id="_description">DESCRIPTION</h2>
 759 <div class="sectionbody">
 760 <div class="paragraph"><p>Install <strong>SYSLINUX</strong> to the <em>DEVICE</em>/<em>PATH</em>, altering the boot sector and
 761 installing the <em>ldlinux.sys</em> boot loader file.  For the Linux installer
 762 extlinux, <em>PATH</em> is the desired path for the control files on a mounted,
 763 supported file system and sets the install-time working directory.  For
 764 all others, <em>DEVICE</em> must specify a FAT12/FAT16/FAT32 file system.  For
 765 the Linux installers syslinux and syslinux-mtools, <em>DEVICE</em> should be an
 766 unmounted file system.  For the DOS/Win32/Win64 installers, <em>DEVICE</em>
 767 should be a drive like <em>a:</em> (case insensitive).</p></div>
 768 <div class="paragraph"><p>For versions ~4.00 and later, either -i/--install or -U/--update must be
 769 specified unless modifying the ADV of an existing install (options
 770 tagged with <em>ADV</em>) or requesting the help/usage or version info, .</p></div>
 771 <div class="paragraph"><p>If, during boot, the Shift or Alt keys are held down, or the Caps or
 772 Scroll locks are set, <strong>Syslinux</strong> will display a <strong>lilo</strong>(8) -style "boot:"
 773 prompt. The user can then type a kernel file name followed by any kernel
 774 parameters. The <strong>Syslinux</strong> bootloader does not need to know about the
 775 kernel or config files in advance.</p></div>
 776 <div class="paragraph"><p><strong>Syslinux</strong> supports the loading of initial ramdisks (initrd) and the
 777 bzImage kernel format.</p></div>
 778 <div class="paragraph"><p>Please note, the ldlinux.sys boot loader file is flagged as immutable
 779 (where applicable) and is modified after copying in to help ensure
 780 boot-time integrity.  File systems with a sufficiently large boot loader
 781 reserved area, like btrfs, will have ldlinux.sys installed there rather
 782 than as a normal file.  Prior to version 4.00, extlinux would install a
 783 file extlinux.sys which versions 4.00 and later installers will replace with ldlinux.sys.</p></div>
 784 </div>
 785 </div>
 786 <div class="sect1">
 787 <h2 id="_options">OPTIONS</h2>
 788 <div class="sectionbody">
 789 <div class="sect2">
 790 <h3 id="_standalone_options">Standalone options</h3>
 791 <div class="dlist"><dl>
 792 <dt class="hdlist1">
 793 <strong>-i</strong>, <strong>--install</strong>
 794 </dt>
 795 <dd>
 796 <p>
 797 (~4.00+) Install SYSLINUX, regardless of an existing install.
 798 </p>
 799 </dd>
 800 <dt class="hdlist1">
 801 <strong>-U</strong>, <strong>--update</strong>
 802 </dt>
 803 <dd>
 804 <p>
 805 (~4.00+) Update an existing SYSLINUX/EXTLINUX install.  If no Syslinux
 806 boot loader is present, return an error.
 807 </p>
 808 </dd>
 809 <dt class="hdlist1">
 810 <strong>-h</strong>, <strong>--help</strong>
 811 </dt>
 812 <dd>
 813 <p>
 814 Display help/usage information.
 815 </p>
 816 </dd>
 817 <dt class="hdlist1">
 818 <strong>-v</strong>, <strong>--version</strong>
 819 </dt>
 820 <dd>
 821 <p>
 822 Display version information and exit immediately.
 823 </p>
 824 </dd>
 825 </dl></div>
 826 </div>
 827 <div class="sect2">
 828 <h3 id="_regular_options">Regular Options</h3>
 829 <div class="dlist"><dl>
 830 <dt class="hdlist1">
 831 <strong>-a</strong>, <strong>--active</strong>
 832 </dt>
 833 <dd>
 834 <p>
 835 (DOS/Win32/Win64 ONLY) Mark the install target file system&#8217;s partition
 836 active.
 837 </p>
 838 </dd>
 839 <dt class="hdlist1">
 840 <strong>-d</strong>, <strong>--directory</strong> <em>subdirectory</em>
 841 </dt>
 842 <dd>
 843 <p>
 844 (Not necessary for extlinux as it is implied by <em>PATH</em>) Install the
 845 <strong>SYSLINUX</strong> control files in a subdirectory with the specified name
 846 (relative to the root directory on the device).
 847 </p>
 848 </dd>
 849 <dt class="hdlist1">
 850 <strong>--device</strong> <em>DEVICE</em>
 851 </dt>
 852 <dd>
 853 <p>
 854 (extlinux ONLY; 4.06+) Force use of a specific block device (experts
 855 only).
 856 </p>
 857 </dd>
 858 <dt class="hdlist1">
 859 <strong>-f</strong>, <strong>--force</strong>
 860 </dt>
 861 <dd>
 862 <p>
 863 Force install even if it appears unsafe.  Before 4.00, -f was used for
 864 --offset in the Linux installers.
 865 </p>
 866 </dd>
 867 <dt class="hdlist1">
 868 <strong>-H</strong>, <strong>--heads</strong> <em>head-count</em>
 869 </dt>
 870 <dd>
 871 <p>
 872 Override the detected number of heads for the geometry.  See also
 873 <strong>--sector</strong>.
 874 </p>
 875 </dd>
 876 </dl></div>
 877 <div class="paragraph"><p><strong>-m</strong>, <strong>--mbr</strong>:
 878 (DOS/Win32/Win64 ONLY) Install the regular Syslinux MBR code to the MBR.</p></div>
 879 <div class="dlist"><dl>
 880 <dt class="hdlist1">
 881 <strong>-M</strong>, <strong>--menu-save</strong>
 882 </dt>
 883 <dd>
 884 <p>
 885 (4.00+; ADV) Set the label to select as default on the next boot.
 886 </p>
 887 </dd>
 888 <dt class="hdlist1">
 889 <strong>-o</strong>, <strong>--once</strong> <em>command</em>
 890 </dt>
 891 <dd>
 892 <p>
 893 (ADV) Declare a boot command to be tried on the first boot only.  The
 894 use of <strong>-o</strong> for the Linux installers syslinux or syslinux-mtools has
 895 been deprecated as of ~4.00 and is no longer valid as of ~4.02.
 896 </p>
 897 </dd>
 898 <dt class="hdlist1">
 899 <strong>-O</strong>, <strong>--clear-once</strong>
 900 </dt>
 901 <dd>
 902 <p>
 903 Clear the boot-once command.  See also <strong>--once</strong>.
 904 </p>
 905 </dd>
 906 <dt class="hdlist1">
 907 <strong>-r</strong>, <strong>--raid</strong>
 908 </dt>
 909 <dd>
 910 <p>
 911 (ADV) RAID mode.  If boot fails, tell the BIOS to boot the next device
 912 in the boot sequence (usually the next hard disk) instead of stopping
 913 with an error message.  This is useful for RAID-1 booting.
 914 </p>
 915 </dd>
 916 <dt class="hdlist1">
 917 <strong>--reset-adv</strong>
 918 </dt>
 919 <dd>
 920 <p>
 921 (ADV) Reset auxilliary data vector.
 922 </p>
 923 </dd>
 924 <dt class="hdlist1">
 925 <strong>-S</strong>, <strong>--sectors</strong> <em>sector-count</em>
 926 </dt>
 927 <dd>
 928 <p>
 929 Override the detected number of sectors for the geometry.  See also
 930 <strong>--head</strong>.
 931 </p>
 932 </dd>
 933 <dt class="hdlist1">
 934 <strong>-s</strong>, <strong>--stupid</strong>
 935 </dt>
 936 <dd>
 937 <p>
 938 Install a "safe, slow and stupid" version of <strong>SYSLINUX</strong>. This version
 939 may work on some very buggy BIOSes on which <strong>SYSLINUX</strong> would otherwise
 940 fail. If you find a machine on which the -s option is required to make
 941 it boot reliably, please send as much info about your machine as you
 942 can, and include the failure mode.
 943 </p>
 944 </dd>
 945 <dt class="hdlist1">
 946 <strong>-t</strong>, <strong>--offset</strong> <em>offset</em>
 947 </dt>
 948 <dd>
 949 <p>
 950 (Linux syslinux/syslinux-mtools ONLY) Indicates that the filesystem is
 951 at an offset from the base of the device or file.
 952 </p>
 953 </dd>
 954 </dl></div>
 955 <div class="paragraph"><p><strong>-z</strong>, <strong>--zipdrive</strong>
 956 Assume zipdrive geometry (<em>--heads 64 --sectors 32</em>).  See also <strong>--head</strong>
 957 and <strong>--sector</strong>.</p></div>
 958 </div>
 959 </div>
 960 </div>
 961 <div class="sect1">
 962 <h2 id="_examples">EXAMPLES</h2>
 963 <div class="sectionbody">
 964 <div class="sect2">
 965 <h3 id="_booting_dos">Booting DOS</h3>
 966 <div class="paragraph"><p>For booting DOS and other similar operating systems, there is an easy
 967 and generally reliable solution to substitute in SYSLINUX as the primary
 968 boot loader.</p></div>
 969 <div class="ulist"><ul>
 970 <li>
 971 <p>
 972 Make a DOS-bootable disk;  The following are possible commands:
 973 </p>
 974 <div class="literalblock">
 975 <div class="content">
 976 <pre><code>format a: /s
 977 sys a:</code></pre>
 978 </div></div>
 979 </li>
 980 <li>
 981 <p>
 982 Copy the DOS boot sector off using Linux or copybs.com:
 983 </p>
 984 <div class="literalblock">
 985 <div class="content">
 986 <pre><code>dd if=/dev/fd0 of=dos.bss bs=512 count=1
 987 copybs a: a:dos.bss</code></pre>
 988 </div></div>
 989 </li>
 990 <li>
 991 <p>
 992 Install SYSLINUX using one of:
 993 </p>
 994 <div class="literalblock">
 995 <div class="content">
 996 <pre><code>syslinux a:
 997 syslinux /dev/fd0               (before 4.00)
 998 syslinux -i /dev/fd0            (4.00+)</code></pre>
 999 </div></div>
1000 </li>
1001 <li>
1002 <p>
1003 For Linux, mount the disk and copy the dos.bss to the disk:
1004 </p>
1005 <div class="literalblock">
1006 <div class="content">
1007 <pre><code>mount -t msdos /dev/fd0 /mnt
1008 cp dos.bss /mnt</code></pre>
1009 </div></div>
1010 </li>
1011 <li>
1012 <p>
1013 Copy a Linux kernel image and initrd payload files:
1014 </p>
1015 <div class="dlist"><dl>
1016 <dt class="hdlist1">
1017 <strong>Linux:</strong>
1018 </dt>
1019 <dd>
1020 <p>
1021         cp vmlinux /mnt
1022         cp initrd.gz /mnt
1023 </p>
1024 </dd>
1025 <dt class="hdlist1">
1026 <strong>DOS/Windows:</strong>
1027 </dt>
1028 <dd>
1029 <p>
1030         copy vmlinux a:
1031         copy initrd.gz a:
1032 </p>
1033 </dd>
1034 </dl></div>
1035 </li>
1036 <li>
1037 <p>
1038 For Linux, umount the disk (if applicable):
1039 </p>
1040 <div class="literalblock">
1041 <div class="content">
1042 <pre><code>umount /mnt</code></pre>
1043 </div></div>
1044 </li>
1045 </ul></div>
1046 </div>
1047 <div class="sect2">
1048 <h3 id="_mbr">MBR</h3>
1049 <div class="paragraph"><p>In order to boot from a hard disk (or hard disk-like device) in BIOS
1050 mode, an appropriate MBR boot block must also be installed in the MBR
1051 (first sector or 512 bytes of the disk), occupying at most 440 bytes.</p></div>
1052 <div class="dlist"><dl>
1053 <dt class="hdlist1">
1054 <strong>DOS/Windows:</strong>
1055 </dt>
1056 <dd>
1057 <p>
1058 If using FDISK, FDISK or a similar application must also be used to mark
1059 the partition as active.
1060 </p>
1061 <div class="literalblock">
1062 <div class="content">
1063 <pre><code>    fdisk /mbr
1064 OR
1065     syslinux -ma c:</code></pre>
1066 </div></div>
1067 </dd>
1068 <dt class="hdlist1">
1069 <strong>Linux:</strong>
1070 </dt>
1071 <dd>
1072 <div class="literalblock">
1073 <div class="content">
1074 <pre><code>dd bs=440 count=1 conv=notrunc if=mbr/mbr.bin of=/dev/sda</code></pre>
1075 </div></div>
1076 <div class="paragraph"><p>For altmbr.bin, an easy way to overwrite the MBR boot block and specify
1077 the partion number is:</p></div>
1078 <div class="literalblock">
1079 <div class="content">
1080 <pre><code>printf '\1' | cat altmbr.bin - | dd bs=440 count=1 \
1081   iflag=fullblock conv=notrunc of=/dev/sda</code></pre>
1082 </div></div>
1083 <div class="paragraph"><p>Note: using <em>cat</em> for writing the MBR can under some circumstances cause
1084 data loss or overwritting.  For this reason, using <em>dd</em> is recommended
1085 for all situations.</p></div>
1086 </dd>
1087 </dl></div>
1088 </div>
1089 </div>
1090 </div>
1091 <div class="sect1">
1092 <h2 id="_see_also">SEE ALSO</h2>
1093 <div class="sectionbody">
1094 <div class="paragraph"><p><strong>syslinux.cfg</strong>(5), <strong>syslinux-cli</strong>(1), <strong>lilo</strong>(8), <strong>keytab-lilo.pl</strong>(8),
1095 <strong>fdisk</strong>(8), <strong>mkfs</strong>(8), <strong>superformat</strong>(1).</p></div>
1096 </div>
1097 </div>
1098 <div class="sect1">
1099 <h2 id="_author">AUTHOR</h2>
1100 <div class="sectionbody">
1101 <div class="paragraph"><p>This AsciiDoc derived document is a modified version of the original
1102 <strong>SYSLINUX</strong> documentation by H. Peter Anvin &lt;<a href="mailto:hpa@zytor.com">hpa@zytor.com</a>&gt;. The conversion to
1103 a manpage was made by Arthur Korn &lt;<a href="mailto:arthur@korn.ch">arthur@korn.ch</a>&gt;.  The conversion to
1104 an AsciiDoc was made by Gene Cumm &lt;<a href="mailto:gene.cumm@gmail.com">gene.cumm@gmail.com</a>&gt;</p></div>
1105 </div>
1106 </div>
1107 <div class="sect1">
1108 <h2 id="_copyright">COPYRIGHT</h2>
1109 <div class="sectionbody">
1110 <div class="paragraph"><p>Copyright (C) 1994-2012 H. Peter Anvin. Free use of this software is granted
1111 under the terms of the GNU General Public License (GPL), version 2
1112 (GPLv2) (or, at your option, any later version).</p></div>
1113 </div>
1114 </div>
1115 </div>
1116 <div id="footnotes"><hr /></div>
1117 <div id="footer">
1118 <div id="footer-text">
1119 Last updated 2014-01-17 16:09:56 PST
1120 </div>
1121 </div>
1122 </body>
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