2008-11-18
lts.conf 5 File Formats and Conversions LTSP 5
lts.conf Main configuration file for LTSP

Any line beginning with a '#' is considered a comment. Options are of the format:

    VARIABLE=value

## Description

This file gets parsed when LTSP client starts up. The section defined by [default] gets applied to all clients, unless there is a specification for a particular client that overrides it. The per-client specs are prefixed by [<mac address>]

You may also name an arbitrary section with a name, with settings underneath that section. You may then inherit that section with the `LIKE` variable. The Example section has an illustration of this.

boolean values are specified by 'Y,y,True,true' for true and 'N,n,False,false' for false

## lts.conf - general parameters

`CONFIGURE_FSTAB`

  boolean, default True

  /etc/fstab is generated by boot scripts

`FSTAB_0..FSTAB_9`

  string, default unset

  Complete lines to add to /etc/fstab, for example:

      FSTAB_1="server:/home    /home           nfs     defaults,nolock 0       0"

`CRONTAB_01..CRONTAB_10`

  string, default unset

  A crontab line to add for a thin client.

`DNS_SERVER`

  string, default unset

  A valid IP for domain name server Used to build the client's resolv.conf file. Not needed by default.

`SEARCH_DOMAIN`

  string, default unset

  sets a valid search domain in the clients's resolv.conf file. Used to build the resolv.conf file. Not needed by default.

  Needed if `DNS_SERVER` is set

`HOSTNAME`

  string, default unset

  This parameter sets the host name for the thin client, for situations when if no DNS is available. A hostname is auto-generated if no hostname is set.

`HOSTNAME_BASE`

  string, default ltsp

  This parameter sets the base for the autogenerated host name for the thin client.

`HOSTNAME_EXTRA`

  string, default ip

  This parameter determines weather autogenerated host names are appended with information based on the ip address or mac address. Values are "ip" or "mac".

`NBD_SWAP`

  boolean, default False

  Set this to `True` if you want to turn on NBD swap.

  If unspecified, it's automatically enabled for thin clients with less than 300 MB RAM and for fat clients with less than 800 MB RAM.

`NBD_SWAP_PORT`

  integer, default 10809

  The port on which NBD swapping will occur. An nbd-server export named `swap` is normally used.

`NBD_SWAP_SERVER`

  IP address, default SERVER

  The NBD swap server can exist on any server on the network that is capable of handling it. You can specify the IP address of that server. The default is whatever the value of `SERVER` set to.

`NBD_SWAP_THRESHOLD`

  integer, default 300

  Automatically enable `NBD_SWAP` if the client has less RAM than the specified. For FAT clients, it defaults to 800.

`RM_SYSTEM_SERVICES`

  string, default unset

  A space separated list of services that shouldn't start on the clients even if they're installed, for example:

      RM_SYSTEM_SERVICES="apache2 dnsmasq mysql nbd-server nfs-kernel-server"

`RM_THIN_SYSTEM_SERVICES`

  string, default unset

  Same as `RM_SYSTEM_SERVICES`, but it only affects thin clients.

`KEEP_SYSTEM_SERVICES`

  string, default unset

  Some services are deleted by default when an LTSP client boots, either to save RAM, or because they don't make sense for netbooted machines. If you need some of them you can list them in `KEEP_SYSTEM_SERVICES`, for example:

      KEEP_SYSTEM_SERVICES="acpid avahi-daemon bluetooth cups"

`SERVER`

  IP address, default unset

  This is the server that is used for the `XDM_SERVER`, `TELNET_HOST`, `XFS_SERVER` and `SYSLOG_HOST`, if any of those are not specified explicitly. If you have one machine that is acting as the server for everything, then you can just specify the address here and omit the other server parameters. If this value is not set, it will be auto detected as the machine that the thin client booted from.

`SYSLOG_HOST`

  IP address, default unset

  If you want to send logging messages to a machine other than the default server, then you can specify the machine here. If this parameter is NOT specified, then it will use the `SERVER` parameter described above. Starting from LTSP 5.4.1 and on, this parameter must be specified to enable remote logging.

  You have to configure your server to accept remote logging as well.

`USE_LOCAL_SWAP`

  boolean, default False

  If you have a hard drive installed in the thin client, with a valid swap partition on it, this parameter will allow the thin client to swap to the local hard drive.

`TIMEZONE`

  string, default unset

  The timezone code for the thin client to use.

`TIMESERVER`

  IP address, default unset

  The address of an NTP time server that the thin client can set it's time from. If unset, the thin client just uses the BIOS time.

`SHUTDOWN_TIME`

  string, format hh:mm:ss in 24 hour format, default unset

  Time at which thin client will automatically shut down.

`LTSP_FATCLIENT`

  boolean, default unset

  Enable Fat Client support. It's automatically enabled if any sessions exist in /usr/share/xsessions.

`FAT_RAM_THRESHOLD`

  integer, default 300

  Disable fat client support if less RAM is present.

## lts.conf - local devices

`LOCALDEV`

  boolean, default True

  This parameter enables local devices support, like CD's and USB sticks. Users plugging them in should see them on the desktop, after they've been allowed to access the FUSE subsystem on the server. Check your distibutions docs to see how this is done on your distribution.

`LOCALDEV_DENY_CD`

  boolean, default False

  This parameter disables local device support for CD and DVD-rom devices.

`LOCALDEV_DENY_FLOPPY`

  boolean, default False

  This parameter disables local device support for floppy devices.

`LOCALDEV_DENY_INTERNAL_DISKS`

  boolean, default True

  This parameter disables local device support for internal ATA and SCSI hard disk devices.

`LOCALDEV_DENY_USB`

  boolean, default False

  This parameter disables local device support for USB devices.

`LOCALDEV_DENY`

  string, default unset

  This parameter disables local device support for devices matching certain patterns. Values are specified as a comma-separated list of sysfs attributes, which can be obtained by using udevadm info (or udevinfo). for example:

                              udevadm info -q env -n /dev/hda
                              ID_TYPE=disk
                              ID_BUS=ata

  should return a list of the attributes relevent to /dev/hda. to exclude this disk and disks like it using LOCALDEV_DENY: LOCALDEV_DENY="ID_BUS:ata+ID_TYPE:disk" would match devices that were on the ata bus that were disks.

## lts.conf - scripts and modules

`MODULE_01...MODULE_10`

  string, default unset

  Up to 10 kernel modules can be loaded by using these configuration entries. The entire command line that you would use when running insmod can be specified here. For example:

      MODULE_01 = uart401.o
      MODULE_02 = "sb.o io=0x220 irq=5 dma=1"
      MODULE_03 = opl3.o

  If the value of this parameter is an absolute path name, then `insmod` will be used to load the module. Otherwise, `modprobe` will be used.

  In normal circumstances, you shouldn't need to specify anything here, as most hardware will be auto-detected.

`RCFILE_01...RCFILE_10`

  string, default unset

  Commands to be executed from `/etc/rc.local` when the client boots.

## lts.conf - printer parameters

`PRINTER_0_DEVICE`

  string, default unset

  The device name of the printer. Valid device names such as `/dev/lp0`, or `/dev/usblp0` are allowed.

`PRINTER_0_PORT`

  integer, default 9100

  The TCP/IP Port number to use for the print server.

`PRINTER_0_TYPE`

  string, default unset

  Can either be set to P (for parallel), U (for USB) or S (for serial). Autodetected in most cases (except for serial).

`PRINTER_0_WRITE_ONLY`

  boolean, default False

  Some parallel printers may need this set in order for the thin client to communicate to them properly. If you have problems with a parallel printer only printing part of the print job, try setting this to True.

`PRINTER_0_SPEED`

  integer, default 9600

  Should be set to the baud rate of the printer (serial printers only).

`PRINTER_0_FLOWCTRL`

  string, default unset

  Should be set to the flow control desired for the printer (serial printers only).

`PRINTER_0_PARITY`

  boolean, default False

  Specifies whether parity should be enabled for the printer (serial printers only).

`PRINTER_0_DATABITS`

  integer, default 8

  Specifies how many data bits for the printer (serial printers only).

`PRINTER_0_OPTIONS`

  string, default unset

  Specifies specific options for the printer (serial printers only).

`LDM_PRINTER_LIST`

  string, default unset

  Comma separated list of printers that will be displayed for that thin client (requires patched cups, included in Debian and Ubuntu).

`LDM_PRINTER_DEFAULT`

  string, default unset

  Default printer for the thin client.

`SCANNER`

  boolean, default unset

  This parameter enables scanners for the thin client.

## lts.conf - keyboard parameters

`CONSOLE_KEYMAP`

  A valid console keymap, default en

  Allows you to specify a valid console keymap for TELNET_HOST sessions.

`XKBLAYOUT`

  A valid xkb layout, default unset

  Consult the X.org documentation for valid settings.

`XKBMODEL`

  A valid xkb model, default unset

  Consult the X.org documentation for valid settings.

`XKBVARIANT`

  A valid xkb variant, default unset

  Consult the X.org documentation for valid settings.

`XKBRULES`

  A valid xkb rules specifier, default unset

  Consult the X.org documentation for valid settings.

`XKBOPTIONS`

  A valid xkb options specifier, default unset

  Consult the X.org documentation for valid settings.

## lts.conf touchscreen parameters

`USE_TOUCH`

  Enable touchscreen

  default <unset>, Enable touchscreen

  X_TOUCH_DEVICE | Path to device | /dev/ttyS0 | set device for touchscreen
  X_TOUCH_DRIVER | Touchscreen driver | elographics | set driver for touchscreen
  X_TOUCH_MAXX | integer | 3588 | Xmax
  X_TOUCH_MAXY | integer | 3526 | Ymax
  X_TOUCH_MINX | integer | 433 | Xmin
  X_TOUCH_MINY | integer | 569 | Ymin
  X_TOUCH_UNDELAY | integer | 10 | Untouch delay
  X_TOUCH_RTPDELAY | integer | 10 | Repeat touch delay

## Sound and volume control parameters

These parameters allow you to control the volume on the thin client.

`SOUND`

  boolean, default True

  This parameter enables sound for the thin client.

`SOUND_DAEMON`

  string, default pulse

  This parameter sets which sound daemon to use on the thin client. Values are esd, nasd, and pulse (default).

`VOLUME`

  integer, default 90

  This represents an integer percentage of the volume, ranging from 0 to 100%.

`HEADPHONE_VOLUME`

  integer, default unset

  This represents an integer percentage of the headphone volume, ranging from 0 to 100%.

`PCM_VOLUME`

  integer, default unset

  This represents an integer percentage of the PCM volume, ranging from 0 to 100%.

`CD_VOLUME`

  integer, default unset

  This represents an integer percentage of the CD input volume, ranging from 0 to 100%.

`FRONT_VOLUME`

  integer, default unset

  This represents an integer percentage of the front speaker volume, ranging from 0 to 100%.

`MIC_VOLUME`

  integer, default unset

  This represents an integer percentage of the microphone input volume, ranging from 0 to 100%.

## lts.conf - Xorg parameters

These parameters affect how Xorg behaves.

`USE_XFS`

  boolean, default False

  Instructs the thin client to look at the `XFS_SERVER` option, and use XFS for serving fonts.

`XFS_SERVER`

  IP address, default unset

  If you are using an X Font Server to serve fonts, then you can use this entry to specify the IP address of the host that is acting as the font server. If this is not specified, it will use the default server, which is specified with the `SERVER` entry described above.

`CONFIGURE_X`

  If you want to be able to configure the individual settings of the X configuration file, without having the X automatically configure the graphics card for you, you must enable this option. By default this option is turned off. To turn it on do:

      CONFIGURE_X = True

  You don't need this option just for keyboard and mouse settings. It corresponds to the graphic card and monitor options only.
`X_CONF`

  string, default unset

  If you want to create your own complete X.org config file, you can do so and place it in the `/opt/ltsp/<arch>/etc/X11` directory. Then, whatever you decide to call it needs to be entered as a value for this configuration variable. For example: X_CONF = /etc/X11/my-custom-xorg.conf Note that for the thin client, you reference it from `/etc/X11`.

`X_RAMPERC`

  default '100', Percentage of RAM for X server

  Some programs allocate a large amount of ram in the X.org server running on your thin client. Programs like `Firefox` and `Evince` can use up so much ram, that they eventually exhaust all your physical ram, and NBD swap, causing your thin client to crash. If you find your clients being booted back to a login prompt, or freezing up when viewing certain PDF's or web pages, this may be the problem.

  The `X_RAMPERC` variable stands for X RAM PERCent, and is a number between 0 and 100 that specifies how much of the free space on your thin client X.org is allowed to consume. You'll generally want to set it at something lower than 100 percent, if you're having problems. Experimentation has shown a value between 80 and 90 will usually keep the terminal alive. What will then happen is the program consuming the memory will die, as opposed to the thin client itself. If you're having unexplained terminal problems, specifying:

  X_RAMPERC = 80

  in your `lts.conf` file may improve things.

`X_VIRTUAL`

  string, default unset

  If you want to have a virtual screen which is larger than the physical screen on your thin client, you would configure that by providing a string of the form "width height" in this parameter, similar to the `xorg.conf` format.

`XDM_SERVER`

  IP address, default unset

  If you're using the older `startx` screen script, and need to specify a different XDMCP server, then you can specify the server here. If this parameter is NOT specified, then it will use the `SERVER` parameter described above.

`XSERVER`

  You can use this parameter to override which X server the thin client will run. For PCI and AGP video cards, this parameter should not be required. The thin client should normally be able to auto-detect the card.

  If, for some reason you do need to manually set it, here are some valid values:

  ark, ati, atimisc, chips, cirrus_alpine cirrus, cirrus_laguna, cyrix, dummy, fbdev fglrx, glint, i128, i740, i810, imstt, mga, neomagic, newport, nsc, nv, r128, radeon, rendition, riva128, s3, s3virge, savage, siliconmotion, sis, sisusb, tdfx, tga, trident, tseng, v4l, vesa, vga, via, vmware, voodoo

`X_MOUSE_DEVICE`

  string, default unset

  This is the device node that the mouse is connected to. If it is a serial mouse, this would be a serial port, such as `/dev/ttyS0` or `/dev/ttyS1`. This is not needed for PS/2 or USB mice, as they are auto-detected.

`X_MOUSE_PROTOCOL`

  Should be auto-detected. However, valid entries include:

  sunkbd, lkkbd, vsxxxaa, spaceorb, spaceball, magellan, warrior, stinger, mousesystems, sunmouse, microsoft, mshack, mouseman, intellimouse, mmwheel, iforce, h3600ts, stowawaykbd, ps2serkbd, twiddler, twiddlerjoy

`X_MOUSE_EMULATE3BTN`

  boolean, default unset

  Normally unset, may need to be set to Y for certain 2 button mice.

`X_NUMLOCK`

  boolean, default False

  If this variable is set to True, then the numlock key will be defaulted to on when the terminal boots. Note that the `numlockx` command must be installed in the chroot for this to work.

`X_COLOR_DEPTH`

  Integer: 2, 4, 8, 16, 24, 32 default unset

  This is the number of bits to use for the colour depth. Possible values are `8`, `16`, `24` and `32`. 8 bits will give 256 colours, 16 will give 65536 colours, 24 will give 16 million colours and 32 bits will give 4.2 billion colours! Not all X servers support all of these values. The default for thin clients is 16 in order to minimize network bandwidth, while for fat clients the X server default is used.

`X_SMART_COLOR_DEPTH`

  boolean, default True

  If set, thin clients no longer default to 16 bit colour depth but use the X server default instead.

`X_HORZSYNC`

  min-max values

  This sets the X.org `HorizSync` configuration parameter. This should be auto-detected for your monitor, however, if you want to force a lower resolution, use this parameter to do so.

`X_VERTREFRESH`

  min-max values

  This sets the X.org `VertRefresh` configuration parameter. This should be auto-detected for your monitor. If you need to force a lower resolution, use this parameter to do so.

`X_VIDEO_RAM`

  string, default unset

  This sets the X.org `VideoRam` configuration parameter. The setting is in kilobytes. This should be auto-detected for your monitor. If you need to force a different video ram setting, use this parameter to do so.

`X_OPTION_01...X_OPTION_12`

  A valid Device option

  This allows you to specify `Option` settings in the `xorg.conf` file, to add options to the video driver. A common use for this will be to test turning off acceleration in your driver, if you're having trouble. An example usage would be:

      X_OPTION_01 = "\"NoAccel\"" X_OPTION_02 = "\"AnotherOption\" \"True\""

  You probably won't need these except in special circumstances.

`X_MONITOR_OPTION_01...X_MONITOR_OPTION_10`

  string, default unset

  A valid Monitor option, that would normally be used in an xorg.conf file.

`X_MODE_0`, `X_MODE_1`, and `X_MODE_2`

  string, default unset

  These set the X.org `ModeLine` configuration. For example, if your thin client comes up in a higher resolution than what you want, say, 1280x1024, specifying:

      X_MODE_0 = 1024x768

  should get your desired resolution on startup.

  X_MODE_* require XRANDR_DISABLE=True to work. For drivers that support XRANDR, the XRANDR_MODE_* variabled are preferred. See the XRANDR section.

`X_BLANKING`

  A positive integer

  When set, `X_BLANKING` will cause DPMS standby to activate after the number of seconds provided. If the monitor does not support DPMS, then the blanking screensaver will activate. If `X_BLANKING` is set to 0, the monitor will remain on indefinitely. NOTE: This does not apply to the `xdmcp` or `startx` screen script. Also, server-side Xclients such as power managers and screensavers may override this setting.

## lts.conf options - XRANDR options

`XRANDR_COMMAND_0 ... XRANDR_COMMAND_9`

  string, default unset

  Full xrandr command to run when X starts. They're useful to define and add custom modes, for example:

      XRANDR_COMMAND_0="xrandr --newmode 1024x600 49.00 1024 1072 1168 1312 600 603 613 624 -hsync +vsync"
      XRANDR_COMMAND_1="xrandr --addmode VGA1 1024x600"
      XRANDR_COMMAND_2="xrandr --output VGA1 --mode 1024x600"

  You can use `cvt` to find the correct timings for new modes.
`XRANDR_DISABLE`

  boolean, default False

  Disables XRANDR output handling so that the older `X_MODE_0` way of setting resolution works. This is useful on older Xorg drivers that don't support XRANDR.

`XRANDR_OUTPUT_0 ... XRANDR_OUTPUT_8`

  string, default unset

  Define xrandr output - can also be used for multihead positioning

`XRANDR_MODE_0 ... XRANDR_MODE_8`

  string, default unset

  Valid video mode resolution. Sets mode for corresponding output.

`XRANDR_NEWMODE_0 ... XRANDR_NEWMODE_8`

  string, default unset

  Specifies a valid modeline for a corresponding output.

`XRANDR_RATE_0 ... XRANDR_RATE_8`

  string, default unset

  Sets refresh rate for the corresponding output.

`XRANDR_DPI_0 ... XRANDR_DPI_8`

  string, default unset

  Sets the DPI for the corresponding output.

`XRANDR_ROTATE_0 ... XRANDR_ROTATE_8`

  string, default unset

  Sets the rotation for the corresponding output.

`XRANDR_REFLECT_0 ... XRANDR_REFLECT_8`

  string, default unset

  Sets the reflection for the corresponding output.

`XRANDR_SIZE_0 ... XRANDR_SIZE_8`

  string, default unset

  Sets the resolution for the corresponding output (for xrandr <1.2).

`XRANDR_ORIENTATION_0 ... XRANDR_ORIENTATION_8`

  string, default unset

  Sets the orientation for the corresponding output (for xrandr <1.2).

## lts.conf options - screen scripts

`SCREEN_01...SCREEN_12`

  string, default ldm

  Up to 12 screen scripts can be specified for a thin client. This will give you up to 12 sessions on the thin client, each accessible by pressing the Ctrl-Alt-F1 through Ctrl-Alt-F12 keys.

  Currently, possible values include: kiosk, ldm, menu, rdesktop (deprecated), shell, ssh, startx (deprecated), telnet, xdmcp, xfreerdp, xterm

  Look in the `$CHROOT/usr/share/ltsp/screen.d` directory for more scripts, or write your own, and put them there.

`TELNET_HOST`

  IP address, default unset

  If the thin client is setup to have a character based interface, then the value of this parameter will be used as the host to telnet into. If this value is NOT set, then it will use the value of `SERVER` above.

## lts.conf options - LDM options

`LDM_AUTOLOGIN`

  boolean, default False

  This option allows the thin client to login automatically without the need for a username and password. To set it set

      LDM_AUTOLOGIN = True

  for the corresponding thin client. This will attempt to log in the thin client with username = hostname and password = hostname. You can also set a user and password with `LDM_USERNAME` and `LDM_PASSWORD` variables.
`LDM_DEBUG_TERMINAL`

  boolean, default False

  Opens a local terminal after login for debugging purposes.

`LDM_DIRECTX`

  boolean, default False

  This is arguably the most important LDM option, as it allows you to turn off the encrypted X tunnel via SSH, and instead run a less secure, but much faster unencrypted tunnel. Users who have slower thin clients will want to set this to True. It is set to True by default in Fedora.

`LDM_GUESTLOGIN`

  boolean, default False

  This option places a GUEST LOGIN button underneath the entry field for username and password. To set it set

      LDM_GUESTLOGIN = True

  for the corresponding thin client. You can also set a user and password with

      LDM_USERNAME = John

  and

      LDM_PASSWORD = secret

  , although not setting these will default to the hostname of the thin client.
`LDM_GUEST_SERVER`

  string, default unset

  This is a space-separated list of available servers where guest logins are available. The first server in the list will be the default guest login server unless the user selects another from the preferences menu at login time.

`LDM_USER_ALLOW`

  string

  This option allows you to give access to certain thin clients based on the username set in `/etc/passwd`. For example, thin client A should only be used by Jane, Bob, and Fred, while thin client B is to be used by Harry only. By adding these options to the corresponding mac addresses you allow or deny access to the thin clients in question. Example:

      [thin:client:A:mac:address]
      LDM_USER_ALLOW = Jane,Bob,Fred
      [thin:client:B:mac:adddress]
      LDM_USER_ALLOW = Harry

`LDM_LOGIN_TIMEOUT`

  integer

  This lets LDM automatically login after the set amount of time in seconds. If you specify this option, then do not specify LDM_AUTOLOGIN. Use it in this format:

      [thin:client:mac:address]
      LDM_LOGIN_TIMEOUT = 25

  Note that you will need to also set LDM_GUESTLOGIN=True for LDM_LOGIN_TIMEOUT to be useful.

`LDM_USERNAME`

  string, default unset

  This is the username that LDM will use for autologin.

`LDM_PASSWORD`

  string, default unset

  This is the password that LDM will use for autologin.

`LDM_SYSLOG`

  boolean, default False

  Normally, LDM logs to a simple file on the thin client, namely `/var/log/ldm.log`. This has the advantage of being fast, but the disadvantage of being hard to read for the administrator in the event of a problem, as the administrator must either spawn a shell screen session, or enable root login in tty1. By setting this option to "True", you can log up to the server if you've enabled your server's syslog for remote logging.

`LDM_SERVER`

  string, default unset

  This is a space-separated list of available servers for LDM to log into. The first server in the list will be the default server unless the user selects another from the preferences menu at login time.

`LDM_LANGUAGE`

  string, default unset

  This allows the system administrator to override the default locale settings on the server by setting the environment variables LANG, LANGUAGE and LC_ALL at login.

  Use the LANG variable to set the default locale for LDM's user interface.

`LDM_FORCE_LANGUAGE`

  string, default unset

  Same as `LDM_LANGUAGE`, but it overrides any previously user selected language and it even hides the LDM language selection menu.

`LDM_SSHOPTIONS`

  string

  Allows you to specify custom options to the ssh sessions started between LDM and the server.

`SSH_OVERRIDE_PORT`

  integer, default unset

  If you run your ssh server different from the defult, you may set the port the thin client will use with this parameter.

`SSH_FOLLOW_SYMLINKS`

  boolean, default unset

  Causes `sshfs` mounted filesystems for local applications to follow symlinks. By default it's false for symlinks under $HOME and true for any `LOCAL_APPS_EXTRAMOUNTS`.

`LDM_SESSION`

  string, default unset

  Used to chose the default session on the server, for example:

      LDM_SESSION="gnome-fallback"

  You can find the list of services that your server provides in `/usr/share/xsessions`.

  If the user has selected a specific session though LDM or another DM in the past, that's stored in his `~/.dmrc`, and it overrides the default session.

`LDM_FORCE_SESSION`

  string, default unset

  Same as `LDM_SESSION`, but it overrides any previously selected sessions by the user and it even hides the LDM session selection menu.

`LDM_XSESSION`

  string, default Xsession

  Allows you to specify custom script on the server for LDM to run, rather than the server's standard script for starting an X session (usually `Xsession`).

`LDM_LIMIT_ONE_SESSION`

  boolean, default False

  Only allow a given user to log into one thin-client at a time.

`LDM_LIMIT_ONE_SESSION_PROMPT`

  boolean, default False

  Prompt to kill processes of other logins when other logins are detected. Requires LDM_LIMIT_ONE_SESSION to be set.

`LDM_THEME`

  string, default unset

  Specify the name of the LDM theme. It can reference a directory in /usr/share/ldm/themes, or be specified as a full path to the theme dir (both relative to the chroot).

  To use the theme in `/opt/ltsp/i386/usr/share/ldm/themes/MYTHEME`, you'd specify:

      LDM_THEME=MYTHEME

  In your `lts.conf` file.

  Alternately, To use the theme in `/opt/ltsp/i386/etc/MYTHEME`, you'd specify:

      LDM_THEME=/etc/MYTHEME

  In your `lts.conf` file.

## Local Applications

`LOCAL_APPS`

  boolean, default True

  Enables support for running local apps on the thin client.

`LOCAL_APPS_EXTRAMOUNTS`

  string, default unset

  This parameter enables extra mount points to be mounted on the thin client with sshfs. This require a commas separated list of directory.

`LOCAL_APPS_MENU`

  boolean, default False

  Enables overriding of menu items from remote (server) applications. If this is set to True, local applications in the users menu will be used instead of the applications on the server.

`LOCAL_APPS_MENU_ITEMS`

  string, default unset

  This item should contain a comma separated list of application names as they appear on their .desktop files.

`LOCAL_APPS_WHITELIST`

  string, default unset

  Used to allow only specified space-separated commands to be run as local apps, allow all is default if unset. Full-paths are required for each command. No spaces in the names are allowed.

## Samples

### K12LTSP

    # Global defaults for all clients
    # if you refer to the local server, just use the
    # "server" keyword as value
    # see lts_parameters.txt for valid values
    ################
    [default]
        #X_COLOR_DEPTH=16
        LOCALDEV=True
        SOUND=True
        NBD_SWAP=True
        SYSLOG_HOST=server
        #XKBLAYOUT=de
        SCREEN_02=shell
        SCREEN_03=shell
        SCREEN_04=shell
        SCREEN_05=shell
        SCREEN_06=shell
        SCREEN_07=ldm
        # LDM_DIRECTX=True allows greater scalability and performance
        # Turn this off if you want greater security instead.
        LDM_DIRECTX=True
        # LDM_SYSLOG=True writes to server's syslog
        LDM_SYSLOG=True

    ################
    # A setting stanza for an old machine
    ################
    [oldmachine]
        X_COLOR_DEPTH=8
        X_MODE_0=800x600

    ################
    # Example of the LIKE variable
    ################
    [01:23:DE:AD:BE:EF]
        LIKE=oldmachine
        SCREEN_02=shell

    ################
    #[MAC ADDRESS]: Per thin client settings
    ################
    [00:11:25:84:CE:BA]
        XSERVER = vesa
        X_MOUSE_DEVICE=/dev/ttyS0
        X_MOUSE_PROTOCOL=intellimouse

    ###############
    # A Thin Client Print server
    # (switch off X by pointing tty7 to shell,
    # to save ressources)
    ###############
    [00:11:25:93:CF:00]
        PRINTER_0_DEVICE=/dev/usblp0
        SCREEN_07=shell

    ###############
    # A workstation that executes a specific
    # command after login
    ###############
    [00:11:25:93:CF:02]
        LDM_SESSION=/usr/bin/myloginscript

## NOTES

When using NBD to export the client image (the default in Ubuntu), lts.conf is fetched via TFTP, so lts.conf should go in the TFTP directory, for example `dvar/lib/tftpboot/ltsp/i386/lts.conf`. For distributions that use NFS, the traditional lts.conf place is `/opt/ltsp/i386/etc/lts.conf`, although in recent versions it can be fetched via TFTP as well.

## SEE ALSO

Other manpage references go here...