Install FreeBSD on Linode
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FreeBSD is a free and open-source operating system based on the Berkeley Software Distribution originally developed at Berkeley Computer Systems Research Group from the late 1970’s. BSD originally started as a series of addon programs and tweaks to Bell Labs UNIX, implementing features and new programs like the venerable vi editor’s first release. Today FreeBSD is used all over the world, including in some major video game consoles!
FreeBSD is often compared to Linux. So what’s the difference?
Briefly, Linux is a term used for a group of operating systems that all use the Linux kernel, GNU coreutils and various distribution-specific tools. Linux OS’s are offered in distributions and usually released under the GNU General Public License. CentOS, Debian and Ubuntu make up Linode’s core distribution offerings, while Arch, Gentoo, openSUSE and Slackware are other popular distributions also available with Linode.
Though FreeBSD grew out of the original UNIX codebase, no UNIX code currently remains. Every part of FreeBSD is developed in the same source tree and code is released under the more permissive FreeBSD License as opposed to the GNU GPL’s copyleft stance. More information on the differences between these operating systems is available in the FreeBSD Quickstart Guide for Linux Users.
Begin by creating the Linode and making some preliminary changes.
Create your Linode in your preferred data center. For the purposes of this tutorial, we recommend turning Lassie off to prevent the watchdog from attempting to restart your Linode without your input. You can disable Lassie in the Settings tab of the Linode Manager under Shutdown Watchdog.
Create two disk images; both should be in the RAW format.
- The first should be a 1024 MB image labeled Installer.
- The second should use the Linode’s remaining space. Label it FreeBSD.
Create two configuration profiles with the following settings. In each profile, you will need to disable all of the options under Filesystem/Boot Helpers.
- Label: Installer
- Kernel: Direct Disk
- /dev/sda: FreeBSD disk image.
- /dev/sdb: Installer disk image.
- root / boot device: Standard /dev/sdb
- Label: FreeBSD
- Kernel: Direct Disk
- /dev/sda: FreeBSD disk image.
- root / boot device: Standard /dev/sda
Boot into Rescue Mode with the installer disk mounted to
/dev/sdaand access your Linode using Lish via SSH by clicking on the Launch Console link from your Linode’s dashboard of the Linode Cloud Manager.
Once in Rescue Mode, run the following command, replacing latest with the latest
memstick.imgfile from the FreeBSD download page:
curl $latest | dd of=/dev/sda
As of this guide’s writing, the latest release is version 12.0. The following command will download the 12.0 release image to your Linode:
curl ftp://ftp.freebsd.org/pub/FreeBSD/releases/amd64/amd64/ISO-IMAGES/12.0/FreeBSD-12.0-RELEASE-amd64-memstick.img | dd of=/dev/sda
When the command finishes, reboot into your Installer profile.
Go to the Networking tab in the Linode Cloud Manager. Access your Linode using Glish to start the installation. Note that Glish must be used to complete the installation of FreeBSD.
The first thing Glish will show you is the FreeBSD welcome screen. Press Enter to boot into multi-user mode.
Follow through the prompts to start the installer, choose your keymap and set a hostname if you want one.
For beginners, we suggest selecting to install 32-bit libraries (lib32) and source code (src). Deselect games if you have no use for them.
Choose your partitioning and storage options. We recommend using ZFS (auto) for the filesystem and partitioning setup.
Configure any additional ZFS options you may want.
Select the striped disk type, as we’re only using a single disk.
da0virtual disk and then confirm that you do want to destroy its contents.
At this point, the distribution files will extract and install. You’ll then be asked to set a
rootuser password.SSH logins for
rootare disabled by default in FreeBSD but standard system users have SSH access.
You’ll next be presented with options for configuring networking. For beginners, answer Yes when asked if you want to use IPv4 with DHCP and IPv6 with SLAAC.
DHCP and SLAAC will provide the default DNS resolvers. Add or edit these options as needed.
Ensure that your clock is set to local time rather than UTC. Choose No to set FreeBSD to a timezone of your choice.
Select the services that you wish to run on boot. We recommend that beginners use the default choices.
Add an additional user for SSH access safer system administration. To give your new user superuser privileges, add the user to the
wheelgroup when asked to invite the user to any other groups. The other fields can be left default.
At the next prompt, choose to Apply configuration and exit installer. You’ll then be asked if you’d like to drop into a shell before rebooting. Choose Yes here.
This final step is required to enable Lish, Glish, and make a few other changes. Use your favorite text editor and insert the following at the bottom of
/boot/loader.conf. (FreeBSD ships with
nvi, linked as
- File: /boot/loader.conf
1 2 3 4
boot_multicons="YES" boot_serial="YES" comconsole_speed="115200" console="comconsole,vidconsole"
Exit Glish, return to the Linode Manager and reboot into the FreeBSD profile. You should have full SSH and administrative access as the user you created in Step 9.
You may wish to consult the following resources for additional information on this topic. While these are provided in the hope that they will be useful, please note that we cannot vouch for the accuracy or timeliness of externally hosted materials.
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