|SYSLINUX(1)||General Commands Manual||SYSLINUX(1)|
- syslinux --install /dev/fd0
- -i, --install
- Install SYSLINUX on a new medium, overwriting any previously installed bootloader.
- -U, --update
- Install SYSLINUX on a new medium if and only if a version of SYSLINUX is already installed.
- -s, --stupid
- Install a "safe, slow and stupid" version of SYSLINUX. This version may work on some very buggy BIOSes on which SYSLINUX would otherwise fail. If you find a machine on which the -s option is required to make it boot reliably, please send as much info about your machine as you can, and include the failure mode.
- -f, --force
- Force install even if it appears unsafe.
- -r, --raid
- RAID mode. If boot fails, tell the BIOS to boot the next device in the boot sequence (usually the next hard disk) instead of stopping with an error message. This is useful for RAID-1 booting.
- -d, --directory subdirectory
- Install the SYSLINUX control files in a subdirectory with the specified name (relative to the root directory on the device).
- -t, --offset offset
- Indicates that the filesystem is at an offset from the base of the device or file.
- --once command
- Declare a boot command to be tried on the first boot only.
- -O, --clear-once
- Clear the boot-once command.
- -H, --heads head-count
- Override the detected number of heads for the geometry.
- -S, --sectors sector-count
- Override the detected number of sectors for the geometry.
- -z, --zipdrive
- Assume zipdrive geometry (--heads 64 --sectors 32).
- default kernel [ options ... ]
- Sets the default command line. If syslinux boots automatically, it will act just as if the entries after "default" had been typed in at the "boot:" prompt.
- If no DEFAULT or UI statement is found, or the configuration file is missing entirely, SYSLINUX drops to the boot: prompt with an error message (if NOESCAPE is set, it stops with a "boot failed" message; this is also the case for PXELINUX if the configuration file is not found.)
- NOTE: Until SYSLINUX 3.85, if no configuration file is present, or no
- "default" entry is present in the configuration file, the default is "linux auto".
- Even earlier versions of SYSLINUX used to automatically
- append the string "auto" to whatever the user specified using the DEFAULT command. As of version 1.54, this is no longer true, as it caused problems when using a shell as a substitute for "init." You may want to include this option manually.
- append options ...
- Add one or more options to the kernel command line.
These are added both for automatic and manual boots. The options are added
at the very beginning of the kernel command line, usually permitting
explicitly entered kernel options to override them. This is the equivalent
of the lilo(8)
kernel image append options ...
Indicates that if label is entered as the kernel to boot, syslinux should instead boot image, and the specified "append" options should be used instead of the ones specified in the global section of the file (before the first "label" command.) The default for image is the same as label, and if no "append" is given the default is to use the global entry (if any). Use "append -" to use no options at all. Up to 128 "label" entries are permitted.
- The "image" doesn't have to be a Linux kernel; it can be a boot sector (see below.)
- implicit flag_val
- If flag_val is 0, do not load a kernel image unless it has been explicitly named in a "label" statement. The default is 1.
- timeout timeout
- Indicates how long to wait at the "boot:" prompt until booting automatically, in units of 1/10 s. The timeout is cancelled as soon as the user types anything on the keyboard, the assumption being that the user will complete the command line already begun. A timeout of zero will disable the timeout completely, this is also the default. The maximum possible timeout value is 35996; corresponding to just below one hour.
- serial port [ baudrate ]
- Enables a serial port to act as the console. "port" is a number (0 = /dev/ttyS0 = COM1, etc.); if "baudrate" is omitted, the baud rate defaults to 9600 bps. The serial parameters are hardcoded to be 8 bits, no parity, 1 stop bit.
- For this directive to be guaranteed to work properly, it should be the first directive in the configuration file.
- font filename
- Load a font in .psf format before displaying any output (except the copyright line, which is output as ldlinux.sys itself is loaded.) syslinux only loads the font onto the video card; if the .psf file contains a Unicode table it is ignored. This only works on EGA and VGA cards; hopefully it should do nothing on others.
- kbdmap keymap
- Install a simple keyboard map. The keyboard remapper used is very simplistic (it simply remaps the keycodes received from the BIOS, which means that only the key combinations relevant in the default layout - usually U.S. English - can be mapped) but should at least help people with AZERTY keyboard layout and the locations of = and , (two special characters used heavily on the Linux kernel command line.)
- The included program keytab-lilo.pl(8) from the
distribution can be used to create such keymaps.
- display filename
- Displays the indicated file on the screen at boot time (before the boot: prompt, if displayed). Please see the section below on DISPLAY files. If the file is missing, this option is simply ignored.
- prompt flag_val
- If flag_val is 0, display the "boot:" prompt only if the Shift or Alt key is pressed, or Caps Lock or Scroll lock is set (this is the default). If flag_val is 1, always display the "boot:" prompt.
f1 filename f2 filename ... f9 filename f10 filename f11 filename f12 filename
Displays the indicated file on the screen when a function key is pressed at the "boot:" prompt. This can be used to implement pre-boot online help (presumably for the kernel command line options.)
- When using the serial console, press <Ctrl-F><digit> to get to the help screens, e.g. <Ctrl-F>2 to get to the f2 screen. For f10-f12, hit <Ctrl-F>A, <Ctrl-F>B, <Ctrl-F>C. For compatiblity with earlier versions, f10 can also be entered as <Ctrl-F>0.
- <FF> = <Ctrl-L> = ASCII 12
- Clear the screen, home the cursor. Note that the screen is filled with the current display color.
- <SI><bg><fg>, <SI> = <Ctrl-O> = ASCII 15
- Set the display colors to the specified background and foreground colors, where <bg> and <fg> are hex digits, corresponding to the standard PC display attributes:
0 = black 8 = dark grey 1 = dark blue 9 = bright blue 2 = dark green a = bright green 3 = dark cyan b = bright cyan 4 = dark red c = bright red 5 = dark purple d = bright purple 6 = brown e = yellow 7 = light grey f = white
- Picking a bright color (8-f) for the background results in the corresponding dark color (0-7), with the foreground flashing.
- colors are not visible over the serial console.
- <CAN>filename<newline>, <CAN> = <Ctrl-X> = ASCII 24
- If a VGA display is present, enter graphics mode and display the graphic included in the specified file. The file format is an ad hoc format called LSS16; the included Perl program "ppmtolss16" can be used to produce these images. This Perl program also includes the file format specification.
- The image is displayed in 640x480 16-color mode. Once in graphics mode, the display attributes (set by <SI> code sequences) work slightly differently: the background color is ignored, and the foreground colors are the 16 colors specified in the image file. For that reason, ppmtolss16 allows you to specify that certain colors should be assigned to specific color indicies.
- Color indicies 0 and 7, in particular, should be chosen with care: 0 is the background color, and 7 is the color used for the text printed by SYSLINUX itself.
- <EM>, <EM> = <Ctrl-U> = ASCII 25
- If we are currently in graphics mode, return to text mode.
- <DLE>..<ETB>, <Ctrl-P> ..<Ctrl-W> = ASCII 16-23
- These codes can be used to select which modes to print a certain part of the message file in. Each of these control characters select a specific set of modes (text screen, graphics screen, serial port) for which the output is actually displayed:
Character Text Graph Serial ------------------------------------------------------ <DLE> = <Ctrl-P> = ASCII 16 No No No <DC1> = <Ctrl-Q> = ASCII 17 Yes No No <DC2> = <Ctrl-R> = ASCII 18 No Yes No <DC3> = <Ctrl-S> = ASCII 19 Yes Yes No <DC4> = <Ctrl-T> = ASCII 20 No No Yes <NAK> = <Ctrl-U> = ASCII 21 Yes No Yes <SYN> = <Ctrl-V> = ASCII 22 No Yes Yes <ETB> = <Ctrl-W> = ASCII 23 Yes Yes Yes
- For example:
<DC1>Text mode<DC2>Graphics mode<DC4>Serial port<ETB>... will actually print out which mode the console is in!
- <SUB> = <Ctrl-Z> = ASCII 26
- End of file (DOS convention).
none or other Linux kernel image BSS Boot sector (DOS superblock will be patched in) BS Boot sectorFor filenames given on the command line, syslinux will search for the file by adding extensions in the order listed above if the plain filename is not found. Filenames in KERNEL statements must be fully qualified.
- Use the -s (safe, slow and stupid) option to SYSLINUX
- Put the boot image as close to the beginning of the ISO 9660 filesystem as possible.
|19 July 2010||SYSLINUX|