This change adds the display(1) graphical user interface and desktop environment with basic windowing support and the graphical terminal(1) emulator along with integrations in chkblayout(1), chvideomode(1), sysinstall(8), sysupgrade(8), as well as the games and ports. Adopt the Aurora procedural wallpaper in display(1) and login(8). Remove the obsolete dispd. Juhani contributed keyboard and video mode APIs to the display protocol and other miscellaneous changes. dzwdz contributed the initial functioning window buttons, improved title bar, window tiling, and minor bug fixes Co-authored-by: Juhani Krekelä <juhani@krekelä.fi> Co-authored-by: dzwdz <kg67199@gmail.com>
549 lines
18 KiB
Groff
549 lines
18 KiB
Groff
.Dd February 5, 2018
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.Dt RELEASE-ISO-MODIFICATION 7
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.Os
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.Sh NAME
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.Nm release-iso-modification
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.Nd instructions on how to modify release .iso filesystems
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.Sh DESCRIPTION
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This document describes how to modify Sortix .iso releases to meet your custom
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needs.
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The bootloader configuration in .iso releases is designed with an extensible
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hooks system that let's you override it with further configuration and to load
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additional files of your choice into the live environment.
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The live environment is configurable through the normal operating system
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configuration as described in section 5 of the manual.
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.Pp
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The release modification procedure lets you customize aspects such as the
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default bootloader menu option and timeout, the default hostname, the default
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keyboard layout, the default graphics resolution, adding files of your choice to
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the live environment, control which drivers are loaded by default, control which
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live environment daemons are started by default, deploy ssh keys so secure shell
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connections are trusted on the first connection, configure automatic
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installation and upgrading, and so on.
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.Ss Prerequisites
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.Bl -bullet -compact
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.It
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A
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.Pa sortix-x.y-arch.iso
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release for your architecture.
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.It
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.Xr xorriso 1
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needs to be installed.
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.El
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.Ss Overview
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The release modification process has three stages:
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.Pp
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.Bl -bullet -compact
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.It
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Optionally, creating additional files that will be loaded onto the live
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environment (the liveconfig).
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.It
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Creating additional bootloader configuration (the bootconfig), which will
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contain an archived copy of the liveconfig (if any).
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.It
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Adding the bootconfig to the release .iso.
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.El
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.Pp
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The bootloader menu Install and Upgrade selections will start the live
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environment and run the
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.Xr sysinstall 8
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installer and
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.Xr sysupgrade 8
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upgrader respectively and they are thus also customizable by this procedure.
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.Ss Convenience Scripts
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The release modification can be done manually by hand, or you can use the
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following convenience scripts that make the release modification easy:
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.Pp
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.Bl -bullet -compact
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.It
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.Xr tix-iso-liveconfig 8
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that generates additional configuration files for the live environment.
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.It
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.Xr tix-iso-bootconfig 8
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that generates additional bootloader configuration and optionally configures the
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bootloader to load the liveconfig into the live environment.
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.It
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.Xr tix-iso-add 8
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that adds the bootconfig (and thus the liveconfig if any) to the release .iso.
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.El
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.Pp
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These convenience scripts come with the operating system and are installed in
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the
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.Pa /sbin
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directory.
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These scripts are entirely for convenience and you can perform their tasks
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yourself if they don't meet your needs.
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The scripts are readable shell scripts and you can learn how they work and
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extend them with your own features.
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.Pp
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If you are not on a Sortix system or on a different version of Sortix than the
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one you are customizing, you can download the shell scripts matching the latest
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stable release:
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.Pp
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.Bl -bullet -compact
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.It
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.Lk https://sortix.org/release/stable/scripts/tix-iso-liveconfig
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.It
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.Lk https://sortix.org/release/stable/scripts/tix-iso-bootconfig
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.It
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.Lk https://sortix.org/release/stable/scripts/tix-iso-add
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.El
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.Pp
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If you are not customizing the latest stable release, you can find the matching
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versions of the scripts in the
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.Pa scripts/
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subdirectory of the appropriate release directory, or you can check out the
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.Pa tix
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directory in the source code from
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.Lk https://sortix.org/source/
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matching the release you are currently customizing.
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.Ss Additional Live Configuration Configuration
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The live environment is a normal instance of the operating system and can be
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configured by adding additional files or overwriting existing files.
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Section 5 of the manual documents the system and software configuration files.
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Additional files can also be added for their own sake.
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.Pp
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To do so, create a directory that will contain this additional live environment
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configuration (liveconfig), whose contents will be extracted on top of the live
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environment's root filesystem.
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A compressed archive of this directory will be made in the next subsection and
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needs to be registered with the bootloader configuration.
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.Pp
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The
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.Xr tix-iso-liveconfig 8
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convenience script is useful as it offers a lot of commonly useful
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customizations to the live environment and can populate an initial liveconfig
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directory for you.
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.Ss Additional Bootloader Configuration
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The GRUB bootloader configuration of an release .iso is extensible and allows
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additional configuration to hook into it by writing a
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.Pa /boot/grub/hooks.cfg
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configuration file as described in
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.Xr release-iso-bootconfig 7 .
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.Pp
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To do so, create a directory that will contain this additional bootloader
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configuration (bootconfig), whose contents will be added onto the release .iso.
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The liveconfig (if any) is normally added to the bootconfig as a compressed
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archive and the additional bootloader configuration loads it as an initrd onto
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the live environment.
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The bootconfig will be overlaid to the release .iso in the next subsection.
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.Pp
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The
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.Xr tix-iso-bootconfig 8
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convenience script makes it easy to generate common additional bootloader
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configuration and its documentation has examples of what it can do.
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It is commonly used with the
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.Fl \-liveconfig
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option to generate the bootloader configuration that loads the additional files
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from the liveconfig into the live environment.
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.Ss Adding Files To The Release
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Releases are modified by adding the bootconfig (which contains a compressed copy
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of the liveconfig, if any) files to the release .iso.
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.Pp
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The
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.Xr tix-iso-add 8
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convenience script makes it easy to add files to a release .iso while taking
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care to keep the release .iso bootable after the modification.
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You need
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.Xr xorriso 1
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installed to use this script.
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Alternatively you can add the files to the release .iso by running
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.Xr xorriso 1
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yourself:
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.Bd -literal
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xorriso \\
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-indev "$input_file" \\
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-outdev "$output_file" \\
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-boot_image grub keep \\
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-pathspecs on \\
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-add \\
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="$input_directory"
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.Ed
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.Pp
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Your modified release can then be used in place of the original release.
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See the
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.Sx EXAMPLES
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section below for inspiration on what customizations to make, as well as the
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manual pages for the
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.Xr tix-iso-liveconfig 8
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and
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.Xr tix-iso-bootconfig 8
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convenience scripts.
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.Sh EXAMPLES
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This section contains examples of how one can modify a release .iso.
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.Ss "No Change"
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To customize a release with no customizations except for the bootloader to say
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the release was modified by the current user on the current host:
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.Bd -literal
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tix-iso-bootconfig bootconfig
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tix-iso-add sortix.iso bootconfig
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.Ed
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.Ss Add Files to the Live Environment
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To customize a release with additional files and directories in the live
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environment:
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.Bd -literal
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mkdir -p liveconfig
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mkdir -p liveconfig/root
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echo foo > liveconfig/root/foofile
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echo bar > liveconfig/root/barfile
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tix-iso-bootconfig --liveconfig=liveconfig bootconfig
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tix-iso-add sortix.iso bootconfig
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.Ed
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.Ss Provide Random Seed
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To customize a release with a random seed
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.Pa ( /boot/random.seed )
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(which must be kept confidential and
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not reused, see the warnings in
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.Xr tix-iso-bootconfig 8 ) :
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.Bd -literal
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tix-iso-bootconfig --random-seed bootconfig
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tix-iso-add sortix.iso bootconfig
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rm bootconfig/boot/random.seed # When no longer useful.
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rm sortix.iso # When no longer useful.
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# And erase any media made from sortix.iso when no longer useful.
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.Ed
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.Ss Hostname, Keyboard Layout, and Graphics Resolution
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To customize the live environment of a release with a custom hostname, custom
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keyboard layout, and custom graphics resolution:
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.Bd -literal
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tix-iso-liveconfig \\
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--hostname=dragon \\
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--kblayout=dk \\
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--videomode=1920x1080x32 \\
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liveconfig
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tix-iso-bootconfig --liveconfig=liveconfig bootconfig
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tix-iso-add sortix.iso bootconfig
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.Ed
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.Ss Load Only Basic Ports by Default
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To customize a release to only loads basic ports by default:
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.Bd -literal
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mkdir -p bootconfig/boot/grub
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cat > bootconfig/boot/grub/hooks.cfg << EOF
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select_ports_set_basic
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EOF
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tix-iso-add sortix.iso bootconfig
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.Ed
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.Ss Default Bootloader Menu Option and Timeout
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To customize a release so the default bootloader menu option is to run the
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installer (bootloader menu option 1, counting from 0) and to change the
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bootloader menu timeout to 2 seconds:
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.Bd -literal
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tix-iso-bootconfig --default=1 --timeout=2 bootconfig
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tix-iso-add sortix.iso bootconfig
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.Ed
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.Ss Locked Down Multi-User Live Environment
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To customize a release so the live environment boots to the login screen by
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default with the provided database of users and groups
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.Xr ( passwd 5
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and
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.Xr group 5 ) ,
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password protect the
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bootloader so only the default live environment option can be chosen by
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unauthenticated users:
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.Bd -literal
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mkdir -p liveconfig/etc
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# Each user's password is their username hashed with crypt_newhash(3).
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(printf 'root:%s:0:0:root:/root:sh\\n' \\
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'$2b$10$S/fJmYIJSkRdifk61xDYn.w62y.vNu35tZkznR6xa3Ntg0hsbI8tO' &&
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printf 'alice:%s:1000:1000:alice:/home/alice:sh\\n' \\
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'$2b$10$4xGAf5FyCYedWoNltWvbmOOreXcI5cH/f4Jz/pkWrWxwZ7TQ/WbRC' &&
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printf 'bob:%s:1001:1001:bob:/home/bob:sh\\n' \\
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'$2b$10$0.IukhbHNy63te6ozVJ7Pu/EvbCcr892981XbqRQ0w16UPhmDdUqa') |
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cat > liveconfig/etc/passwd
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cat > liveconfig/etc/group << EOF
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root::0:root
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alice::1000:alice
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bob::1001:bob
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EOF
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mkdir -p liveconfig/home
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mkdir -p -m 700 liveconfig/home/alice
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mkdir -p -m 700 liveconfig/home/bob
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grub-mkpasswd-pbkdf2 | # enter bootloader password
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tee /dev/tty |
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tail -n 1 |
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sed 's/PBKDF2 hash of your password is //' > liveconfig/etc/grubpw
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tix-iso-bootconfig --liveconfig=liveconfig bootconfig
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(echo 'insmod password_pbkdf2'
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echo 'set superusers="root"'
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echo "password_pbkdf2 root $(cat liveconfig/etc/grubpw)") |
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cat >> bootconfig/boot/grub/hooks.cfg
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cat > bootconfig/boot/grub/main.cfg << \EOF
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menu_title="$base_menu_title"
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hook_menu_pre
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menuentry "Sortix $version" --unrestricted {
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load_sortix -- /sbin/init --target=multi-user
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}
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hook_menu_post
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EOF
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tix-iso-add sortix.iso bootconfig
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.Ed
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.Ss Add a new Port
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To customize a release with a new port
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.Sy foo
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in the
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.Sy basic
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and
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.Sy all
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port sets and fully integrate it with the bootloader menus:
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.Bd -literal
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mkdir -p bootconfig/boot/grub
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cat > bootconfig/boot/grub/hooks.cfg << \\EOF
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port_foo=true
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tix_foo=false
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export port_foo
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export tix_foo
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function hook_ports_menu {
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if $port_foo; then
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menuentry "foo = true" {
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port_foo=false
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configfile /boot/grub/ports.cfg
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}
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else
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menuentry "foo = false" {
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port_foo=true
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configfile /boot/grub/ports.cfg
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}
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fi
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}
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function hook_tix_menu {
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if $tix_foo; then
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menuentry "foo = true" {
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tix_foo=false
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configfile /boot/grub/tix.cfg
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}
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else
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menuentry "foo = false" {
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tix_foo=true
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configfile /boot/grub/tix.cfg
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}
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fi
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}
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function hook_ports_set_all {
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port_foo=true
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}
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function hook_tix_set_all {
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tix_foo=true
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}
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function hook_ports_set_basic {
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port_foo=true
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}
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function hook_tix_set_basic {
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tix_foo=true
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}
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function hook_ports_set_minimal {
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port_foo=false
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}
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function hook_tix_set_minimal {
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tix_foo=false
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}
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function hook_ports_set_no {
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port_foo=false
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}
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function hook_tix_set_no {
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tix_foo=false
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}
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function hook_ports_pre {
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if $tix_foo; then
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echo -n "Loading /repository/foo.tix.tar.xz (3.0M) ... "
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module --nounzip /repository/foo.tix.tar.xz \\
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--to /repository/foo.tix.tar.xz
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echo done
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fi
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if $port_foo; then
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echo -n "Loading /repository/foo.tix.tar.xz (3.0M) ... "
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module /repository/foo.tix.tar.xz --tix
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echo done
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fi
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}
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EOF
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mkdir -p bootconfig/repository
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cp foo.tix.tar.xz bootconfig/repository/foo.tix.tar.xz
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tix-iso-add sortix.iso bootconfig
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.Ed
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.Ss Add a new Ports Set
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To customize a release with your own set of ports that are loaded by
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default and fully integrate it with the bootloader menus:
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.Bd -literal
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mkdir -p bootconfig/boot/grub
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cat > bootconfig/boot/grub/hooks.cfg << \\EOF
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function hook_ports_menu_sets {
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menuentry "Load only recommended ports" {
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select_ports_set_recommended
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configfile /boot/grub/ports.cfg
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}
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}
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function hook_tix_menu_sets {
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menuentry "Load only basic binary packages" {
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select_tix_set_recommended
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configfile /boot/grub/tix.cfg
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}
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}
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select_ports_set_recommended {
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# The basic set can be extended by calling select_ports_set_basic here.
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port_foo=false
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port_bar=true
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}
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select_tix_set_recommended {
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# The basic set can be extended by calling select_tix_set_basic here.
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tix_foo=false
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tix_bar=true
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}
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# Load the recommended set of ports by default.
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hook_ports_menu_sets
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EOF
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tix-iso-add sortix.iso bootconfig
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.Ed
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.Ss Disable Networking Drivers By Default
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To customize a release so it doesn't load network drivers by default, useful for
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security reasons or to work around driver issues:
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.Bd -literal
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tix-iso-bootconfig --disable-network-drivers bootconfig
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tix-iso-add sortix.iso bootconfig
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.Ed
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.Ss Disable DHCP Auto-Configuration By Default
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To customize a release so
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.Xr dhclient 8
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doesn't automatically configure network interfaces using DHCP, useful if one
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wants to manually configure network interfaces with
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.Xr ifconfig 8 .
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.Bd -literal
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tix-iso-bootconfig --disable-dhclient bootconfig
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tix-iso-add sortix.iso bootconfig
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.Ed
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.Ss Enable SSH Server By Default
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To customize a release so it starts the SSH server
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.Xr sshd 8
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automatically using the SSH configuration found in the liveconfig directory:
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.Bd -literal
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tix-iso-bootconfig --liveconfig=liveconfig --enable-sshd bootconfig
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tix-iso-add sortix.iso bootconfig
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.Ed
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.Ss SSH Into Live Environment
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To customize the live environment of a release so you can ssh into its root
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user, to have the hostname
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.Sy example.com ,
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to start a ssh server with the keys generated now, authorize the local user to
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ssh into the live environment's root user, and register the sshd server's keys
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by their hostnames and network addresses so the connection is trusted on the
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first attempt (you can omit the network addresses if you don't know yet):
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.Bd -literal
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tix-iso-liveconfig \\
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--hostname=example.com \\
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--root-ssh-authorized-keys="$HOME/.ssh/id_rsa.pub" \\
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--sshd-keygen \\
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--sshd-key-known-hosts-file="$HOME/.ssh/known_hosts" \\
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--sshd-key-known-hosts-hosts="example.com example.com,192.0.2.1 192.0.2.1" \\
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liveconfig
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tix-iso-bootconfig --liveconfig=liveconfig --enable-sshd bootconfig
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tix-iso-add sortix.iso bootconfig
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rm -f liveconfig/etc/ssh_host_*_key # When no longer useful.
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rm -f bootconfig/boot/liveconfig.xz # When no longer useful.
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rm -f sortix.iso # When no longer useful.
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# And erase any media made from sortix.iso when no longer useful.
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ssh root@example.org # When the system is running.
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.Ed
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.Pp
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This example generates sshd private keys (remember to delete them when no longer
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needed, see the warnings in
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.Xr tix-iso-liveconfig 8 )
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and shows them by running:
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.Bd -literal
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mkdir -p liveconfig/etc
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for keytype in rsa ecdsa ed25519; do
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ssh-keygen -t $keytype -f liveconfig/etc/ssh_host_${keytype}_key" -N "" \\
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-C "root@$hostname"
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done
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for keytype in rsa ecdsa ed25519; do
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ssh-keygen -l -f liveconfig/etc/ssh_host_${keytype}_key
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done
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.Ed
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.Pp
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It then constructs a
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.Pa known_hosts
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file for each network address and hashes it.
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.Bd -literal
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(for host in $network_addresses; do
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for keytype in rsa ecdsa ed25519; do
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printf '%s ' "$host" &&
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sed -E 's/^([^ ]* [^ ]*).*/\1/' \\
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liveconfig/etc/ssh_host_${keytype}_key.pub
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done
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done) > known_hosts
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ssh-keygen -H -f known_hosts
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rm -f known_hosts.old
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.Ed
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.Pp
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|
.Xr ssh 1
|
|
will trust the server by the network addresses on the first connection if you
|
|
append the contents of
|
|
.Pa known_hosts
|
|
to your
|
|
.Pa ~/.ssh/known_hosts .
|
|
.Pa liveconfig/root/.ssh/authorized_keys
|
|
file is made by appending the appropriate public keys previously made with
|
|
.Xr ssh-keygen 1 .
|
|
.Ss SSH Back From Live Environment
|
|
To customize the live environment of a release so its root user can ssh back to
|
|
your user, where the local hostname is
|
|
.Sy example.com
|
|
(the address to which the new installation will be connecting), by
|
|
generating a private key for the root user
|
|
(remember to delete it when no longer
|
|
needed, see the warnings in
|
|
.Xr tix-iso-liveconfig 8 )
|
|
and adding its public key to your local
|
|
.Pa ~/.ssh/authorized_keys :
|
|
.Bd -literal
|
|
tix-iso-liveconfig --root-ssh-keygen liveconfig
|
|
ssh-keyscan -H example.com > liveconfig/root/.ssh/known_hosts
|
|
cat liveconfig/root/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
|
|
tix-iso-bootconfig --liveconfig=liveconfig --enable-sshd bootconfig
|
|
tix-iso-add sortix.iso bootconfig
|
|
rm -f output-directory/root/.ssh/id_rsa # When no longer useful.
|
|
rm -f bootconfig/boot/liveconfig.xz # When no longer useful.
|
|
rm -f sortix.iso # When no longer useful.
|
|
# And erase any media made from sortix.iso when no longer useful.
|
|
.Ed
|
|
.Pp
|
|
This example will generate a ssh key for the root user by running:
|
|
.Bd -literal
|
|
mkdir -p -m 700 liveconfig/root/.ssh
|
|
ssh-keygen -t rsa -f liveconfig/root/.ssh/id_rsa -N "" -C "root@$hostname"
|
|
.Ed
|
|
.Pp
|
|
Consider omitting the
|
|
.Fl N
|
|
option and password protect the private key to protect it in the case of a leak.
|
|
.Ss Boot to Console Instead of GUI By Default
|
|
To customize a release so it boots to a console instead of the GUI:
|
|
.Bd -literal
|
|
tix-iso-bootconfig --disable-gui bootconfig
|
|
tix-iso-add sortix.iso bootconfig
|
|
.Ed
|
|
.Ss Automatic Installation
|
|
To customize a release so it automatically installs itself per the
|
|
.Xr autoinstall.conf 5 :
|
|
.Bd -literal
|
|
tix-iso-liveconfig --autoinstall=autoinstall.conf liveconfig
|
|
tix-iso-bootconfig --liveconfig=liveconfig --default=1 bootconfig
|
|
tix-iso-add sortix.iso bootconfig
|
|
.Ed
|
|
.Ss Automatic Upgrade
|
|
To customize a release so it automatically upgrades a local installation per the
|
|
.Xr autoupgrade.conf 5 :
|
|
.Bd -literal
|
|
tix-iso-liveconfig --autoinstall=autoupgrade.conf liveconfig
|
|
tix-iso-bootconfig --liveconfig=liveconfig --default=2 bootconfig
|
|
tix-iso-add sortix.iso bootconfig
|
|
.Ed
|
|
.Sh SEE ALSO
|
|
.Xr xorriso 1 ,
|
|
.Xr development 7 ,
|
|
.Xr installation 7 ,
|
|
.Xr release-iso-bootconfig 7 ,
|
|
.Xr upgrade 7 ,
|
|
.Xr user-guide 7 ,
|
|
.Xr tix-iso-add 8 ,
|
|
.Xr tix-iso-bootconfig 8 ,
|
|
.Xr tix-iso-liveconfig 8
|