Anaconda Boot Options¶
|Authors:||Anaconda Developers <email@example.com> Will Woods <firstname.lastname@example.org> Anne Mulhern <email@example.com>|
These are the boot options that are useful when starting Anaconda. For more information refer to the appropriate Installation Guide for your release and to the Anaconda wiki.
Anaconda bootup is handled by dracut, so most of the kernel arguments handled by dracut are also valid. See dracut.kernel(7) for details on those options.
Throughout this guide, installer-specific options are prefixed with
inst.ks). Options specified without the
inst prefix are
recognized, but the prefix may be required in a future release.
An installable tree is a directory structure containing installer images, packages, and repodata. 
Usually this is either a copy of the DVD media (or loopback-mounted DVD
image), or the
<arch>/os/ directory on the Fedora mirrors.
|||an installable tree must contain a valid .treeinfo file
This gives the location of the Install Source - that is, the place where the installer can find its images and packages. It can be specified in a few different ways:
- Search the system’s CDROM drives for installer media. This is the default.
- Look for installer media in the specified disk device.
- Mount the given disk partition and install from ISO file on the given path. This installation method requires ISO file, which contains an installable tree.
- Look for an installable tree at the given URL.
Mount the given NFS server and path. Uses NFS version 3 by default.
You can specify what version of the NFS protocol to use by adding
nfsvers=Xto the options.
This accepts not just an installable tree directory in the
<path>element, but you can also specify an
.isofile. That ISO file is then mounted and used as the installation tree. This is often used for simulating a standard DVD installation using a remote
Disk devices may be specified with any of the following forms:
- Kernel Device Name
- Filesystem Label
- Filesystem UUID
Non-alphanumeric characters should be escaped with
‘NN’ is the hexidecimal representation of the character (e.g.
the space character (‘ ‘).
Prevents Anaconda from verifying the ssl certificate for all HTTPS connections with an exception of the additional kickstart repos (where –noverifyssl can be set per repo).
Use the given proxy settings when performing an installation from a
HTTP/HTTPS/FTP source. The
PROXY_URL can be specified like this:
This specifies the location to fetch only the installer runtime image; packages will be ignored. Otherwise the same as inst.repo.
This specifies the location for driver rpms. May be specified multiple times. Locations may be specified using any of the formats allowed for inst.repo.
This sets dnf’s multilib_policy to “all” (as opposed to “best”).
Give the location of a kickstart file to be used to automate the install. Locations may be specified using any of the formats allowed for inst.repo.
For any format the
<path> component defaults to
/ks.cfg if it is omitted.
For NFS kickstarts, if the
<path> ends in
<ip>-kickstart is added.
inst.ks is used without a value, the installer will look for
<next_server>is the DHCP “next-server” option, or the IP of the DHCP server itself
<filename>is the DHCP “filename” option, or
/kickstart/, and if the filename given ends in
<ip>-kickstartis added (as above)
- DHCP server:
- client address:
- kickstart file:
Add headers to outgoing HTTP requests which include the MAC addresses of all network interfaces. The header is of the form:
X-RHN-Provisioning-MAC-0: eth0 01:23:45:67:89:ab
This is helpful when using
inst.ks=http... to provision systems.
Initial network setup is handled by dracut. For detailed information consult the “Network” section of dracut.kernel(7).
The most common dracut network options are covered here, along with some installer-specific options.
Configure one (or more) network interfaces. You can use multiple
arguments to configure multiple interfaces, but if you do you must specify an
interface for every
ip= argument, and you must specify which interface
is the primary boot interface with bootdev.
Accepts a few different forms; the most common are:
- Try to bring up every interface using the given autoconf method. Defaults
ip=dhcpif network is required by
- Bring up only one interface using the given autoconf method, e.g.
Bring up the given interface with a static network config, where:
- The client IP address. IPv6 addresses may be specified by putting
them in square brackets, like so:
- The default gateway. IPv6 addresses are accepted here too.
- The netmask (e.g.
255.255.255.0) or prefix (e.g.
- Hostname for the client machine. This component is optional.
Bring up the given interface with the given autoconf method, but override the automatically obtained IP/gateway/etc. with the provided values.
Technically all of the items are optional, so if you want to use dhcp but also set a hostname you can use
Specify the address of a nameserver to use. May be used multiple times.
Specify which interface is the boot device. Required if multiple
options are used.
- Assign the given interface name to the network device with the given MAC. May be used multiple times.
Dracut applies ifname option (which might involve renaming the device with given MAC) in initramfs only if the device is activated in initramfs stage (based on ip= option). If it is not the case, installer still binds the current device name to the MAC by adding HWADDR setting to the ifcfg file of the device.
Set the DHCP vendor class identifier [#dhcpd]. Defaults to
Console / Display Options¶
This is a kernel option that specifies what device to use as the primary
console. For example, if your console should be on the first serial port, use
You can use multiple
console= options; boot messages will be displayed on
all consoles, but anaconda will put its display on the last console listed.
Set the language to be used during installation. The language specified must
be valid for the
lang kickstart command.
Install in single language mode - no interactive options for installation language and language support configuration will be available. If a language has been specified via the inst.lang boot option or the lang kickstart command it will be used. If no language is specified Anaconda will default to en_US.UTF-8.
Atomic installations always run in single language mode.
Configure geolocation usage in Anaconda. Geolocation is used to pre-set language and time zone.
- Disables geolocation.
- Use the Fedora GeoIP API (default).
- Use the Hostip.info GeoIP API.
Set the keyboard layout to use. The layout specified must be valid for use with
keyboard kickstart command.
Run the installer in command-line mode. This mode does not allow any interaction; all options must be specified in a kickstart file or on the command line.
Run the installer in graphical mode. This is the default.
Run the installer using a limited text-based UI. Unless you’re using a kickstart file this probably isn’t a good idea; you should use VNC instead.
Run the installer in a non-interactive mode. This mode does not allow any
user interaction and can be used with graphical or text mode. With text
mode it behaves the same as the
Specify screen size for the installer. Use format nxm, where n is the number of horizontal pixels, m the number of vertical pixels. The lowest supported resolution is 800x600.
Run the installer GUI in a VNC session. You will need a VNC client application to interact with the installer. VNC sharing is enabled, so multiple clients may connect.
A system installed with VNC will start in text mode (runlevel 3).
Set a password on the VNC server used by the installer.
Once the install starts, connect to a listening VNC client at the given host. Default port is 5900.
Specify that the machine being installed onto doesn’t have any display hardware, and that anaconda shouldn’t bother looking for it.
Specify the X driver that should be used during installation and on the installed system.
Use the framebuffer X driver (
fbdev) rather than a hardware-specific driver.
sshd during system installation. You can then ssh in while the
installation progresses to debug or monitor its progress.
root account has no password by default. You can set one using
sshpw kickstart command.
Debugging and Troubleshooting¶
Run the rescue environment. This is useful for trying to diagnose and fix broken systems.
Give the location of an
updates.img to be applied to the installer runtime.
Locations may be specified using any of the formats allowed for
For any format the
<path> component defaults to
/updates.img if it is
A debugging option that prevents anaconda from and rebooting when a fatal error occurs or at the end of the installation process.
- Set the minimum level required for messages to be logged on a terminal (log
files always contain messages of all levels). The default value is
Do not put a shell on tty2 during install.
Once installation is running, send log messages to the syslog process on the given host. The default port is 514 (UDP).
Requires the remote syslog process to accept incoming connections.
Forward logs through the named virtio port (a character device at
If not provided, a port named
will be used by default, if found.
See the Anaconda wiki logging page for more info on setting up logging via virtio.
Forces/disables (on/off) usage of zRAM swap for the installation process.
Boot loader options¶
Use extlinux as the bootloader. Note that there’s no attempt to validate that this will work for your platform or anything; it assumes that if you ask for it, you want to try.
Boot the drives in their existing order, to override the default of booting into the newly installed drive on Power Systems servers and EFI systems. This is useful for systems that, for example, should network boot first before falling back to a local boot.
Disable support for dmraid.
This option is never a good idea! If you have a disk that is erroneously identified as part of a firmware RAID array, that means it has some stale RAID metadata on it which must be removed using an appropriate tool (dmraid and/or wipefs).
Disable support for multipath devices. This is for systems on which a false-positive is encountered which erroneously identifies a normal block device as a multipath device. There is no other reason to use this option.
Not for use with actual multipath hardware! Using this to attempt to install to a single path of a multipath is ill-advised, and not supported.
Prefer creation of GPT disklabels.
Enable SELinux usage in the installed system (default). Note that when used as a boot option, “selinux” and “inst.selinux” are not the same. The “selinux” option is picked up by both the kernel and Anaconda, but “inst.selinux” is processed only by Anaconda. So when “selinux=0” is used, SELinux will be disabled both in the installation environment and in the installed system, but when “inst.selinux=0” is used SELinux will only be disabled in the installed system. Also note that while SELinux is running in the installation environment by default, it is running in permissive mode so disabling it there does not make much sense.
Controls what installation results should not be saved to the installed system, valid values are: “input_ks”, “output_ks”, “all_ks”, “logs” and “all”.
- Disables saving of the input kickstart (if any).
- Disables saving of the output kickstart generated by Anaconda.
- Disables saving of both input and output kickstarts.
- Disables saving of all installation logs.
- Disables saving of all kickstarts and all logs.
Multiple values can be combined as a comma separated list, for example:
The nosave option is meant for excluding files from the installed system that can’t be removed by a kickstart %post script, such as logs and input/output kickstarts.
Since Fedora 19 the Anaconda installer supports third-party extensions called addons. The addons can support their own set of boot options which should be documented in their documentation or submitted here.
Enable kdump anaconda addon to setup the kdump service.
These options should still be accepted by the installer, but they are deprecated and may be removed soon.
The difference between an installable tree and a dir with an
.iso file is
autodetected, so this is the same as
Use nameserver instead. Note that
nameserver does not
accept comma-separated lists; use multiple
nameserver options instead.
A PXE-supplied BOOTIF option will be used automatically, so there’s no need
- Not present
- The first device with a usable link is used
- Ignored (this is the same as the default behavior)
- Ignored (this is the default if
- Replaced with
ip=ibft. See ip
- Replaced with
- Replaced with bootdev
These options are obsolete and have been removed.
Anaconda’s initramfs is now is completely non-interactive, so these have been removed.
modprobe handles blacklisting kernel modules on its own; try
You can blacklist the firewire module with
This option was never intended for public use; it was supposed to be used to
force anaconda to use
/dev/ttyS0 as its console when testing it on a live
console=ttyS0 or similar instead. See console for details.
essid, wepkey, wpakey¶
Dracut doesn’t support wireless networking, so these don’t do anything.
Who needs to force half-duplex 10-base-T anymore?
This was used to debug
loader, so it has been removed. There are plenty of
options for debugging dracut-based initramfs - see the dracut “Troubleshooting” guide.
Use the dracut option rd.live.check instead.
We no longer support floppy drives. Try
All this option actually did was set
TERM=vt100. The default
works fine these days, so this was no longer necessary.
ipv6 is built into the kernel and can’t be removed by anaconda.
You can disable ipv6 with
ipv6.disable=1. This setting will be carried onto
the installed system.
Anaconda doesn’t handle upgrades anymore.
inst.repo=hd:<device>:<path> for installable tree¶
Anaconda can’t use this option with installable tree but only with an ISO file.