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<body class="manpage"> | |
<div id="header"> | |
<h1> | |
pxelinux(1) Manual Page | |
</h1> | |
<h2>NAME</h2> | |
<div class="sectionbody"> | |
<p>pxelinux - | |
The Syslinux derivative PXELINUX for PXE network booting | |
</p> | |
</div> | |
</div> | |
<div id="content"> | |
<div class="sect1"> | |
<h2 id="_synopsis">SYNOPSIS</h2> | |
<div class="sectionbody"> | |
<div class="verseblock"> | |
<pre class="content">pxelinux.0</pre> | |
<div class="attribution"> | |
</div></div> | |
</div> | |
</div> | |
<div class="sect1"> | |
<h2 id="_description">DESCRIPTION</h2> | |
<div class="sectionbody"> | |
<div class="paragraph"><p><strong>PXELINUX</strong> is a Syslinux derivative, for booting Linux off a network | |
server, using a network ROM conforming to the Intel PXE (Pre-Execution | |
Environment) specification. <strong>PXELINUX</strong> is <em>*not*</em> a program that is | |
intended to be flashed or burned into a PROM on the network card; if | |
you want that, check out Etherboot (<a href="http://www.etherboot.org/">http://www.etherboot.org/</a>). | |
Etherboot 5.4 or later can also be used to create a PXE-compliant boot | |
PROM for many network cards.</p></div> | |
<div class="paragraph"><p>PXELINUX generally requires that full file pathnames are 127 characters or shorter in length.</p></div> | |
</div> | |
</div> | |
<div class="sect1"> | |
<h2 id="_current_directory">CURRENT DIRECTORY</h2> | |
<div class="sectionbody"> | |
<div class="paragraph"><p>The initial current working directory is either as supplied by DHCP | |
option 210 (pxelinux.pathprefix), the hardcoded path-prefix or the | |
parent directory of the PXELINUX file, as indicated by DHCP fields | |
<em>sname</em> and <em>file</em> (sname="192.168.2.3" and file="boot/pxelinux.0" | |
results in "tftp://192.168.2.3/boot/", "192.168.2.3::boot/" in older | |
PXELINUX format) with precedence specified under <strong>OPTIONS</strong>.</p></div> | |
<div class="paragraph"><p>All unqualified filenames are relative to the current directory.</p></div> | |
</div> | |
</div> | |
<div class="sect1"> | |
<h2 id="_configuration">CONFIGURATION</h2> | |
<div class="sectionbody"> | |
<div class="paragraph"><p>See <strong>syslinux.cfg</strong>(5) for the format of the contents.</p></div> | |
<div class="paragraph"><p>Because more than one system may be booted from the same server, the | |
configuration file name depends on the IP address of the booting | |
machine. After attempting the file as specified in the DHCP or | |
hardcoded options, PXELINUX will probe the following paths, prefixed | |
with "pxelinux.cfg/", under the initial current working directory:</p></div> | |
<div class="ulist"><ul> | |
<li> | |
<p> | |
The client UUID if provided by the PXE stack (note, some BIOSes don’t | |
have a valid UUID, and you might end up with something like all 1’s.) | |
This is in the standard UUID format using lower case hexadecimal digits, | |
e.g. b8945908-d6a6-41a9-611d-74a6ab80b83d. | |
</p> | |
</li> | |
<li> | |
<p> | |
The hardware type (using its ARP type code) and address, all in lower | |
case hexadecimal with dash separators; for example, for an Ethernet (ARP | |
type 1) with address 88:99:AA:BB:CC:DD it would search for the filename | |
01-88-99-aa-bb-cc-dd. | |
</p> | |
</li> | |
<li> | |
<p> | |
The client’s IPv4 address in upper-case hexidecimal (ie 192.168.2.91 | |
→ C0A8025B; you can use the included progam "gethostip" to compute the | |
hexadecimal IP address for any host.) followed by removing characters, | |
one at a time, from the end. | |
</p> | |
</li> | |
<li> | |
<p> | |
"default" | |
</p> | |
</li> | |
</ul></div> | |
<div class="paragraph"><p>Starting in release 3.20, if PXELINUX can not find a configuration file, | |
it will reboot after the timeout interval has expired. This keeps a | |
machine from getting stuck indefinitely due to a boot server failure.</p></div> | |
</div> | |
</div> | |
<div class="sect1"> | |
<h2 id="_options">OPTIONS</h2> | |
<div class="sectionbody"> | |
<div class="paragraph"><p><strong>PXELINUX</strong> (starting with version 1.62) supports the following | |
nonstandard DHCP options, which depending on your DHCP server you may be | |
able to use to customize the specific behaviour of <strong>PXELINUX</strong>. See RFC | |
5071 for some additional information about these options. Options for | |
<strong>PXELINUX</strong> can be specified by DHCP options or hardcoded into the | |
binary.</p></div> | |
<div class="sect2"> | |
<h3 id="_option_priority">Option Priority</h3> | |
<div class="paragraph"><p>Hardcoded after-options are applied after DHCP options (and overrride) | |
while hardcoded before-options are applied prior to DHCP options and | |
default behavior takes the lowest priority.</p></div> | |
</div> | |
<div class="sect2"> | |
<h3 id="_dhcp_options">DHCP options</h3> | |
<div class="dlist"><dl> | |
<dt class="hdlist1"> | |
<strong>Option 208</strong> (pxelinux.magic) | |
</dt> | |
<dd> | |
<p> | |
Earlier versions of <strong>PXELINUX</strong> required this to be set to F1:00:74:7E | |
(241.0.116.126) for <strong>PXELINUX</strong> to recognize any special DHCP options | |
whatsoever. As of <strong>PXELINUX</strong> 3.55, this option is deprecated and is no | |
longer required. | |
</p> | |
</dd> | |
<dt class="hdlist1"> | |
<strong>Option 209</strong> (pxelinux.configfile) | |
</dt> | |
<dd> | |
<p> | |
Specifies the initial <strong>PXELINUX</strong> configuration file name which may be | |
qualified or unqualified. | |
</p> | |
</dd> | |
<dt class="hdlist1"> | |
<strong>Option 210</strong> (pxelinux.pathprefix) | |
</dt> | |
<dd> | |
<p> | |
Specifies the <strong>PXELINUX</strong> common path prefix, instead of deriving it from | |
the boot file name. This almost certainly needs to end in whatever | |
character the TFTP server OS uses as a pathname separator, e.g. slash | |
(/) for Unix. | |
</p> | |
</dd> | |
<dt class="hdlist1"> | |
<strong>Option 211</strong> (pxelinux.reboottime) | |
</dt> | |
<dd> | |
<p> | |
Specifies, in seconds, the time to wait before reboot in the event of | |
TFTP failure. 0 means wait "forever" (in reality, it waits | |
approximately 136 years.) | |
</p> | |
</dd> | |
</dl></div> | |
</div> | |
<div class="sect2"> | |
<h3 id="_hardcoded_options">Hardcoded options</h3> | |
<div class="paragraph"><p>Since version 3.83, the program "pxelinux-options" can be used to | |
hard-code DHCP options into the pxelinux.0 image file; this is | |
sometimes useful when the DHCP server is under different | |
administrative control. Hardcoded options</p></div> | |
<div class="literalblock"> | |
<div class="content"> | |
<pre><code> 6 => 'domain-name-servers', | |
15 => 'domain-name', | |
54 => 'next-server', | |
209 => 'config-file', | |
210 => 'path-prefix', | |
211 => 'reboottime'</code></pre> | |
</div></div> | |
</div> | |
</div> | |
</div> | |
<div class="sect1"> | |
<h2 id="_http_ftp">HTTP/FTP</h2> | |
<div class="sectionbody"> | |
<div class="paragraph"><p>Since version 5.10, a special PXELINUX binary, lpxelinux.0, natively | |
supports HTTP and FTP transfers, greatly increasing load speed and | |
allowing for standard HTTP scripts to present PXELINUX’s configuration | |
file. To use http or ftp, use standard URL syntax as filename; use the | |
DHCP options below to transmit a suitable URL prefix to the client, or | |
use the "pxelinux-options" tool provided in the utils directory to | |
program it directly into the lpxelinux.0 file.</p></div> | |
</div> | |
</div> | |
<div class="sect1"> | |
<h2 id="_filename_syntax">FILENAME SYNTAX</h2> | |
<div class="sectionbody"> | |
<div class="paragraph"><p>PXELINUX supports the following special pathname conventions:</p></div> | |
<div class="dlist"><dl> | |
<dt class="hdlist1"> | |
<strong>::filename</strong> | |
</dt> | |
<dd> | |
<p> | |
Suppresses the common filename prefix, i.e. passes the string "filename" | |
unmodified to the server. | |
</p> | |
</dd> | |
<dt class="hdlist1"> | |
<strong>IP address::filename</strong> (e.g. 192.168.2.3::filename) | |
</dt> | |
<dd> | |
<p> | |
Suppresses the common filename prefix, <strong>and</strong> sends a request to an alternate TFTP server. Instead of an IP address, a DNS name can be used. It will be assumed to be fully qualified if it contains dots; otherwise the local domain as reported by the DHCP server (option 15) will be added. | |
</p> | |
</dd> | |
</dl></div> | |
<div class="paragraph"><p>:: was chosen because it is unlikely to conflict with operating system | |
usage. However, if you happen to have an environment for which the | |
special treatment of :: is a problem, please contact the Syslinux | |
mailing list.</p></div> | |
<div class="paragraph"><p>Since version 4.00, PXELINUX also supports standard URL syntax.</p></div> | |
</div> | |
</div> | |
<div class="sect1"> | |
<h2 id="_keeppxe">KEEPPXE</h2> | |
<div class="sectionbody"> | |
<div class="paragraph"><p>Normally, PXELINUX will unload the PXE and UNDI stacks before invoking | |
the kernel. In special circumstances (for example, when using MEMDISK | |
to boot an operating system with an UNDI network driver) it might be | |
desirable to keep the PXE stack in memory. If the option "keeppxe" | |
is given on the kernel command line, PXELINUX will keep the PXE and | |
UNDI stacks in memory. (If you don’t know what this means, you | |
probably don’t need it.)</p></div> | |
</div> | |
</div> | |
<div class="sect1"> | |
<h2 id="_examples">EXAMPLES</h2> | |
<div class="sectionbody"> | |
<div class="sect2"> | |
<h3 id="_configuration_filename">Configuration filename</h3> | |
<div class="paragraph"><p>For DHCP siaddr 192.168.2.3, file <em>mybootdir/pxelinux.0</em>, client UUID | |
b8945908-d6a6-41a9-611d-74a6ab80b83d, Ethernet MAC address | |
88:99:AA:BB:CC:DD and IPv4 address 192.168.2.91, the following files in | |
this order will be attempted (after config-file options):</p></div> | |
<div class="literalblock"> | |
<div class="content"> | |
<pre><code>mybootdir/pxelinux.cfg/b8945908-d6a6-41a9-611d-74a6ab80b83d | |
mybootdir/pxelinux.cfg/01-88-99-aa-bb-cc-dd | |
mybootdir/pxelinux.cfg/C0A8025B | |
mybootdir/pxelinux.cfg/C0A8025 | |
mybootdir/pxelinux.cfg/C0A802 | |
mybootdir/pxelinux.cfg/C0A80 | |
mybootdir/pxelinux.cfg/C0A8 | |
mybootdir/pxelinux.cfg/C0A | |
mybootdir/pxelinux.cfg/C0 | |
mybootdir/pxelinux.cfg/C | |
mybootdir/pxelinux.cfg/default</code></pre> | |
</div></div> | |
</div> | |
<div class="sect2"> | |
<h3 id="_tftp_servers">TFTP servers</h3> | |
<div class="paragraph"><p>For best results, use a TFTP server which supports the "tsize" TFTP | |
option (RFC 1784/RFC 2349). The "tftp-hpa" TFTP server, which support | |
options, is available at:</p></div> | |
<div class="literalblock"> | |
<div class="content"> | |
<pre><code>http://www.kernel.org/pub/software/network/tftp/ | |
ftp://www.kernel.org/pub/software/network/tftp/</code></pre> | |
</div></div> | |
<div class="paragraph"><p>and on any kernel.org mirror (see <a href="http://www.kernel.org/mirrors/">http://www.kernel.org/mirrors/</a>).</p></div> | |
<div class="paragraph"><p>Another TFTP server which supports this is atftp by Jean-Pierre | |
Lefebvre:</p></div> | |
<div class="literalblock"> | |
<div class="content"> | |
<pre><code>ftp://ftp.mamalinux.com/pub/atftp/</code></pre> | |
</div></div> | |
<div class="paragraph"><p>If your boot server is running Windows (and you can’t fix that), try | |
tftpd32 by Philippe Jounin (you need version 2.11 or later; previous | |
versions had a bug which made it incompatible with PXELINUX):</p></div> | |
<div class="literalblock"> | |
<div class="content"> | |
<pre><code>http://tftpd32.jounin.net/</code></pre> | |
</div></div> | |
</div> | |
<div class="sect2"> | |
<h3 id="_dhcp_config_simple">DHCP config: Simple</h3> | |
<div class="paragraph"><p>The PXE protocol uses a very complex set of extensions to DHCP or | |
BOOTP. However, most PXE implementations — this includes all Intel | |
ones version 0.99n and later — seem to be able to boot in a | |
"conventional" DHCP/TFTP configuration. Assuming you don’t have to | |
support any very old or otherwise severely broken clients, this is | |
probably the best configuration unless you already have a PXE boot | |
server on your network.</p></div> | |
<div class="paragraph"><p>A sample DHCP setup, using the "conventional TFTP" configuration, | |
would look something like the following, using ISC dhcp 2.0 dhcpd.conf | |
syntax:</p></div> | |
<div class="listingblock"> | |
<div class="content"> | |
<pre><code>allow booting; | |
allow bootp; | |
# Standard configuration directives... | |
option domain-name "<domain name>"; | |
option subnet-mask <subnet mask>; | |
option broadcast-address <broadcast address>; | |
option domain-name-servers <dns servers>; | |
option routers <default router>; | |
# Group the PXE bootable hosts together | |
group { | |
# PXE-specific configuration directives... | |
next-server <TFTP server address>; | |
filename "/tftpboot/pxelinux.0"; | |
# You need an entry like this for every host | |
# unless you're using dynamic addresses | |
host <hostname> { | |
hardware ethernet <ethernet address>; | |
fixed-address <hostname>; | |
} | |
}</code></pre> | |
</div></div> | |
<div class="paragraph"><p>Note that if your particular TFTP daemon runs under chroot (tftp-hpa | |
will do this if you specify the -s (secure) option; this is highly | |
recommended), you almost certainly should not include the /tftpboot | |
prefix in the filename statement.</p></div> | |
</div> | |
<div class="sect2"> | |
<h3 id="_dhcp_config_pxe_1">DHCP Config: PXE-1</h3> | |
<div class="paragraph"><p>If the simple config does not work for your environment, you probably | |
should set up a "PXE boot server" on port 4011 of your TFTP server; a | |
free PXE boot server is available at:</p></div> | |
<div class="paragraph"><p><a href="http://www.kano.org.uk/projects/pxe/">http://www.kano.org.uk/projects/pxe/</a></p></div> | |
<div class="paragraph"><p>With such a boot server defined, your DHCP configuration should look | |
the same except for an "option dhcp-class-identifier" ("option | |
vendor-class-identifier" if you are using DHCP 3.0):</p></div> | |
<div class="listingblock"> | |
<div class="content"> | |
<pre><code>allow booting; | |
allow bootp; | |
# Standard configuration directives... | |
option domain-name "<domain name>"; | |
option subnet-mask <subnet mask>; | |
option broadcast-address <broadcast address>; | |
option domain-name-servers <dns servers>; | |
option routers <default router>; | |
# Group the PXE bootable hosts together | |
group { | |
# PXE-specific configuration directives... | |
option dhcp-class-identifier "PXEClient"; | |
next-server <pxe boot server address>; | |
# You need an entry like this for every host | |
# unless you're using dynamic addresses | |
host <hostname> { | |
hardware ethernet <ethernet address>; | |
fixed-address <hostname>; | |
} | |
}</code></pre> | |
</div></div> | |
<div class="paragraph"><p>Here, the boot file name is obtained from the PXE server.</p></div> | |
</div> | |
<div class="sect2"> | |
<h3 id="_dhcp_config_encapsulated">DHCP Config: Encapsulated</h3> | |
<div class="paragraph"><p>If the "conventional TFTP" configuration doesn’t work on your clients, | |
and setting up a PXE boot server is not an option, you can attempt the | |
following configuration. It has been known to boot some | |
configurations correctly; however, there are no guarantees:</p></div> | |
<div class="listingblock"> | |
<div class="content"> | |
<pre><code>allow booting; | |
allow bootp; | |
# Standard configuration directives... | |
option domain-name "<domain name>"; | |
option subnet-mask <subnet mask>; | |
option broadcast-address <broadcast address>; | |
option domain-name-servers <dns servers>; | |
option routers <default router>; | |
# Group the PXE bootable hosts together | |
group { | |
# PXE-specific configuration directives... | |
option dhcp-class-identifier "PXEClient"; | |
option vendor-encapsulated-options 09:0f:80:00:0c:4e:65:74:77:6f:72:6b:20:62:6f:6f:74:0a:07:00:50:72:6f:6d:70:74:06:01:02:08:03:80:00:00:47:04:80:00:00:00:ff; | |
next-server <TFTP server>; | |
filename "/tftpboot/pxelinux.0"; | |
# You need an entry like this for every host | |
# unless you're using dynamic addresses | |
host <hostname> { | |
hardware ethernet <ethernet address>; | |
fixed-address <hostname>; | |
} | |
}</code></pre> | |
</div></div> | |
<div class="paragraph"><p>Note that this <strong>will not</strong> boot some clients that <strong>will</strong> boot with the | |
"conventional TFTP" configuration; Intel Boot Client 3.0 and later are | |
known to fall into this category.</p></div> | |
</div> | |
<div class="sect2"> | |
<h3 id="_dhcp_config_isc_dhcpd_options">DHCP Config: ISC dhcpd options</h3> | |
<div class="paragraph"><p>ISC dhcp 3.0 supports a rather nice syntax for specifying custom | |
options; you can use the following syntax in dhcpd.conf if you are | |
running this version of dhcpd:</p></div> | |
<div class="listingblock"> | |
<div class="content"> | |
<pre><code>option space pxelinux; | |
option pxelinux.magic code 208 = string; | |
option pxelinux.configfile code 209 = text; | |
option pxelinux.pathprefix code 210 = text; | |
option pxelinux.reboottime code 211 = unsigned integer 32;</code></pre> | |
</div></div> | |
<div class="literalblock"> | |
<div class="content"> | |
<pre><code>NOTE: In earlier versions of PXELINUX, this would only work as a | |
"site-option-space". Since PXELINUX 2.07, this will work both as a | |
"site-option-space" (unencapsulated) and as a "vendor-option-space" | |
(type 43 encapsulated.) This may avoid messing with the | |
dhcp-parameter-request-list, as detailed below.</code></pre> | |
</div></div> | |
<div class="paragraph"><p>Then, inside your PXELINUX-booting group or class (whereever you have | |
the PXELINUX-related options, such as the filename option), you can | |
add, for example:</p></div> | |
<div class="listingblock"> | |
<div class="content"> | |
<pre><code># Always include the following lines for all PXELINUX clients | |
site-option-space "pxelinux"; | |
option pxelinux.magic f1:00:74:7e; | |
if exists dhcp-parameter-request-list { | |
# Always send the PXELINUX options (specified in hexadecimal) | |
option dhcp-parameter-request-list = concat(option dhcp-parameter-request-list,d0,d1,d2,d3); | |
} | |
# These lines should be customized to your setup | |
option pxelinux.configfile "configs/common"; | |
option pxelinux.pathprefix "/tftpboot/pxelinux/files/"; | |
option pxelinux.reboottime 30; | |
filename "/tftpboot/pxelinux/pxelinux.bin";</code></pre> | |
</div></div> | |
<div class="paragraph"><p>Note that the configfile is relative to the pathprefix: this will look | |
for a config file called /tftpboot/pxelinux/files/configs/common on | |
the TFTP server.</p></div> | |
<div class="paragraph"><p>The "option dhcp-parameter-request-list" statement forces the DHCP | |
server to send the PXELINUX-specific options, even though they are not | |
explicitly requested. Since the DHCP request is done before PXELINUX | |
is loaded, the PXE client won’t know to request them.</p></div> | |
<div class="paragraph"><p>Using ISC dhcp 3.0 you can create a lot of these strings on the fly. | |
For example, to use the hexadecimal form of the hardware address as | |
the configuration file name, you could do something like:</p></div> | |
<div class="listingblock"> | |
<div class="content"> | |
<pre><code>site-option-space "pxelinux"; | |
option pxelinux.magic f1:00:74:7e; | |
if exists dhcp-parameter-request-list { | |
# Always send the PXELINUX options (specified in hexadecimal) | |
option dhcp-parameter-request-list = concat(option dhcp-parameter-request-list,d0,d1,d2,d3); | |
} | |
option pxelinux.configfile = | |
concat("pxelinux.cfg/", binary-to-ascii(16, 8, ":", hardware)); | |
filename "/tftpboot/pxelinux.bin";</code></pre> | |
</div></div> | |
<div class="paragraph"><p>If you used this from a client whose Ethernet address was | |
58:FA:84:CF:55:0E, this would look for a configuration file named | |
"/tftpboot/pxelinux.cfg/1:58:fa:84:cf:55:e".</p></div> | |
</div> | |
</div> | |
</div> | |
<div class="sect1"> | |
<h2 id="_known_issues">KNOWN ISSUES</h2> | |
<div class="sectionbody"> | |
<div class="paragraph"><p>The following problems are known with PXELINUX, so far:</p></div> | |
<div class="ulist"><ul> | |
<li> | |
<p> | |
The error recovery routine doesn’t work quite right. For right now, | |
it just does a hard reset - seems good enough. | |
</p> | |
</li> | |
<li> | |
<p> | |
We should probably call the UDP receive function in the keyboard | |
entry loop, so that we answer ARP requests. | |
</p> | |
</li> | |
<li> | |
<p> | |
Boot sectors/disk images are not supported yet. | |
</p> | |
</li> | |
</ul></div> | |
<div class="paragraph"><p>If you have additional problems, please contact the Syslinux mailing | |
list (see syslinux.txt for the address.)</p></div> | |
<div class="sect2"> | |
<h3 id="_broken_pxe_stacks">Broken PXE stacks</h3> | |
<div class="paragraph"><p>Lots of PXE stacks, especially old ones, have various problems of | |
varying degrees of severity. Please see:</p></div> | |
<div class="literalblock"> | |
<div class="content"> | |
<pre><code>http://syslinux.zytor.com/hardware.php</code></pre> | |
</div></div> | |
<div class="olist lowerroman"><ol class="lowerroman"> | |
<li> | |
<p> | |
for a list of currently known hardware problems, with workarounds | |
if known. | |
</p> | |
</li> | |
</ol></div> | |
<div class="paragraph"><p>There are a number of extremely broken PXE stacks in the field. The | |
gPXE project (formerly known as Etherboot) provides an open-source PXE | |
stack that works with a number of cards, and which can be loaded from | |
a CD-ROM, USB key, or floppy if desired.</p></div> | |
<div class="paragraph"><p>Information on gPXE is available from:</p></div> | |
<div class="literalblock"> | |
<div class="content"> | |
<pre><code>http://www.etherboot.org/</code></pre> | |
</div></div> | |
<div class="olist lowerroman"><ol class="lowerroman"> | |
<li> | |
<p> | |
and ready-to-use ROM or disk images from: | |
</p> | |
<div class="literalblock"> | |
<div class="content"> | |
<pre><code>http://www.rom-o-matic.net/</code></pre> | |
</div></div> | |
</li> | |
</ol></div> | |
<div class="paragraph"><p>Some cards, like may systems with the SiS 900, has a PXE stack which | |
works just barely well enough to load a single file, but doesn’t | |
handle the more advanced items required by PXELINUX. If so, it is | |
possible to use the built-in PXE stack to load gPXE, which can then | |
load PXELINUX. See:</p></div> | |
<div class="literalblock"> | |
<div class="content"> | |
<pre><code>http://www.etherboot.org/wiki/pxechaining</code></pre> | |
</div></div> | |
</div> | |
</div> | |
</div> | |
<div class="sect1"> | |
<h2 id="_notes">NOTES</h2> | |
<div class="sectionbody"> | |
<div class="sect2"> | |
<h3 id="_mtftp">MTFTP</h3> | |
<div class="paragraph"><p>PXELINUX does not support MTFTP, and there are no plans of doing so, as | |
MTFTP is inherently broken for files more than 65535 packets (about 92 | |
MB) in size. It is of course possible to use MTFTP for the initial | |
boot, if you have such a setup. MTFTP server setup is beyond the scope | |
of this document.</p></div> | |
</div> | |
<div class="sect2"> | |
<h3 id="_error_recovery">Error Recovery</h3> | |
<div class="paragraph"><p>If the boot fails, PXELINUX (unlike SYSLINUX) will not wait forever; | |
rather, if it has not received any input for approximately five | |
minutes after displaying an error message, it will reset the machine. | |
This allows an unattended machine to recover in case it had bad enough | |
luck of trying to boot at the same time the TFTP server goes down.</p></div> | |
</div> | |
</div> | |
</div> | |
<div class="sect1"> | |
<h2 id="_see_also">SEE ALSO</h2> | |
<div class="sectionbody"> | |
<div class="paragraph"><p><strong>syslinux.cfg</strong>(5), <strong>syslinux-cli</strong>(1), <strong>lilo</strong>(8), <strong>keytab-lilo.pl</strong>(8), | |
<strong>fdisk</strong>(8), <strong>mkfs</strong>(8), <strong>superformat</strong>(1).</p></div> | |
</div> | |
</div> | |
<div class="sect1"> | |
<h2 id="_author">AUTHOR</h2> | |
<div class="sectionbody"> | |
<div class="paragraph"><p>This AsciiDoc derived document is a modified version of the original | |
<strong>SYSLINUX</strong> documentation by H. Peter Anvin <<a href="mailto:[email protected]">[email protected]</a>>. The conversion | |
to an AsciiDoc was made by Gene Cumm <<a href="mailto:[email protected]">[email protected]</a>></p></div> | |
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Last updated 2014-01-17 16:09:56 PST | |
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