BSDINSTALL(8) FreeBSD System Manager's Manual BSDINSTALL(8)


bsdinstallsystem installer


bsdinstall [ options][ target][ ...]


bsdinstall is used for installation of new systems, both for system setup from installation media (e.g. CD-ROMs) and for use on live systems to prepare VM images and jails.

Much like make(1), bsdinstall takes a target and possible parameters of the target as arguments. If invoked with no arguments, it will invoke the auto target, which provides a standard interactive installation, invoking the others in sequence. To perform a scripted installation, these subtargets can be invoked separately by an installation script.


bsdinstall supports the following options, global to all targets:
-D file
Provide a path for the installation log file (overrides BSDINSTALL_LOG). See ENVIRONMENT VARIABLES for more information on BSDINSTALL_LOG.


Most of the following targets are only useful for scripting the installer. For interactive use, most users will be interested only in the auto, jail, and script targets.
Run the standard interactive installation, including disk partitioning.
Reads a small amount of data from /dev/random and stores it in a file in the new system's root directory.
jail destination
Sets up a new chroot system at destination, suitable for use with jail(8). Behavior is generally similar to auto, except that disk partitioning and network setup are skipped and a kernel is not installed into the new system.
script script
Runs the installation script at script. See SCRIPTING for more information on this target.
If the current controlling TTY is a syscons(4) or vt(4) console, asks the user to set the current keymap, and saves the result to the new system's rc.conf.
Prompts the user for a host name for the new system and saves the result to the new system's rc.conf. If BSDINSTALL_CONFIGCURRENT is set, also sets the host name of the current system.
Interactively configures network interfaces (first invoking wlanconfig on wireless interfaces), saving the result to the new system's rc.conf and resolv.conf. If BSDINSTALL_CONFIGCURRENT is set, also configures the network interfaces of the current system to match.
Provides the installer's interactive guided disk partitioner for single-disk installations. Partitions disks, runs newfs(8), and writes the new system's fstab.
Provides the installer's (experimental) interactive/scriptable ZFS partitioner for multi-disk installations. Creates a single zpool with datasets and writes to the new system's rc.conf, loader.conf, and fstab. Supports geli(8), gnop(8), and many other features.
Provides the installer's interactive manual disk partitioner, with support for multi disk setups, non-UFS file systems, and manual selection of partition schemes. Partitions disks, runs newfs(8), and writes the new system's fstab.
scriptedpart parameters
Sets up disks like autopart and partedit, but non-interactively according to the disk setup specified in parameters. Each disk setup is specified by a three-part argument:

disk [ scheme][ {partitions}]

Multiple disk setups are separated by semicolons. The disk argument specifies the disk on which to operate (which will be erased), while the scheme argument specifies the gpart(8) partition scheme to apply to the disk. If scheme is unspecified, scriptedpart will apply the default bootable scheme on your platform. The partitions argument is also optional and specifies how to partition disk. It consists of a comma-separated list of partitions to create enclosed in curly braces. Each partition declaration takes the form

size type [ mount point]

size specifies the partition size to create in bytes (K, M, and G suffixes can be appended to specify kilobytes, megabytes, and gigabytes respectively), while the auto keyword causes the partition to take all the remaining space on the disk. The type option chooses the gpart(8) filesystem type (e.g. freebsd-ufs or freebsd-swap). The optional mount point argument sets where the created partition is to be mounted in the installed system. As an example, a typical invocation looks like:

bsdinstall scriptedpart ada0 { 20G freebsd-ufs /, 4G freebsd-swap, 20G freebsd-ufs /var, auto freebsd-ufs /usr }

Mounts the file systems previously configured by autopart, partedit, or scriptedpart under BSDINSTALL_CHROOT.
Verifies the checksums of the distributions listed in DISTRIBUTIONS against the distribution manifest.
Extracts the distributions listed in DISTRIBUTIONS into BSDINSTALL_CHROOT.
Interactively invokes passwd(1) in the new system to set the root user's password.
Interactively invokes adduser(8) in the new system.
Interactively sets the time, date, and time zone of the new system.
Queries the user for the system daemons to begin at system startup, writing the result into the new system's rc.conf.
Installs the configuration files destined for the new system (e.g. rc.conf fragments generated by netconfig, etc.) onto the new system.


The following environment variables control various aspects of the installation process. Many are used internally during installation and have reasonable default values for most installation scenarios. Others are set by various interactive user prompts, and can be usefully overridden when making scripted or customized installers.
The set of distributions to install (e.g. "base kernel ports"). Default: none
The directory in which the distribution files can be found (or to which they should be downloaded). Default: /usr/freebsd-dist
URL from which the distribution files should be downloaded if they are not already present in the directory defined by BSDINSTALL_DISTDIR. This should be a full path to the files, including architecture and release names. Most targets (e.g. auto and jail) that prompt for a FreeBSD mirror will skip that step if this variable is already defined in the environment. Example: ftp://ftp.freebsd.org/pub/FreeBSD/releases/powerpc/powerpc64/9.1-RELEASE
The directory into which the distribution files should be unpacked and the directory at which the root file system of the new system should be mounted. Default: /mnt
Path to a log file for the installation. Default: /tmp/bsdinstall_log
Directory where files destined for the new system's /etc will be stored until the config target is executed. If this directory does not already exist, it will be created. Default: /tmp/bsdinstall_etc
Directory where files destined for the new system's /boot will be stored until the config target is executed. If this directory does not already exist, it will be created. Default: /tmp/bsdinstall_boot


bsdinstall scripts consist of two parts: a preamble and a setup script. The preamble sets up the options for the installation (how to partition the disk[s], which distributions to install, etc.) and the optional second part is a shell script run under chroot(8) in the newly installed system before bsdinstall exits. The two parts are separated by the usual script header (#!), which also sets the interpreter for the setup script.

A typical bsdinstall script looks like this:

DISTRIBUTIONS="kernel.txz base.txz" 
echo "ifconfig_em0=DHCP" >> /etc/rc.conf 
echo "sshd_enable=YES" >> /etc/rc.conf 
pkg install puppet

On FreeBSD release media, such a script placed at /etc/installerconfig will be run at boot time and the system will be rebooted automatically after the installation has completed. This can be used for unattended network installation of new systems; see diskless(8) for details.


The preamble consists of installer settings. These control global installation parameters (see ENVIRONMENT VARIABLES) as well as disk partitioning. The preamble is interpreted as a sh(1) script run at the very beginning of the install. If more complicated behavior than setting these variables is desired, arbitrary commands can be run here to extend the installer. In addition to the variables in ENVIRONMENT VARIABLES, in particular DISTRIBUTIONS, the preamble can contain a variable PARTITIONS which is passed to the scriptedpart target to control disk setup. Alternatively, instead of PARTITIONS, the preamble can contain the variable ZFSBOOT_DATASETS which is parsed by the (experimental) zfsboot target to control ZFS datasets/options of the boot pool setup.


Following the preamble is an optional shell script, beginning with a #! declaration. This script will be run at the end of the installation process inside a chroot(8) environment in the newly installed system and can be used to set up configuration files, install packages, etc. Note that newly configured system services (e.g. networking) have not been started in the installed system at this time and only installation host services are available.


This version of bsdinstall first appeared in FreeBSD 9.0.


Nathan Whitehorn <nwhitehorn@FreeBSD.org>
October 15, 2013 FreeBSD