guix/documentation-manual — Dutch @ Fedora Weblate: guix system list-generations

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	reconfiguring the system
	The third step, once you're happy with your configuration, is to @dfn{instantiate} it---make this configuration effective on your system. To do that, run:
	upgrading system services
	system services, upgrading
	This operation is @dfn{transactional}: either it succeeds and you end up with an upgraded system, or it fails and nothing has changed. Note that it does @emph{not} restart system services that were already running. Thus, to upgrade those services, you have to reboot or to explicitly restart them; for example, to restart the secure shell (SSH) daemon, you would run:
	sudo herd restart sshd
	System services are managed by the Shepherd (@pxref{Jump Start,,, shepherd, The GNU Shepherd Manual}). The @code{herd} command lets you inspect, start, and stop services. To view the status of services, run:
	sudo herd status
	To view detailed information about a given service, add its name to the command:
	sudo herd status sshd
	@xref{Services}, for more information.
	provenance, of the system
	The system records its @dfn{provenance}---the configuration file and channels that were used to deploy it. You can view it like so:
	guix system describe
	Additionally, @command{guix system reconfigure} preserves previous system generations, which you can list:
	guix system list-generations	Systeembeheer
	roll back, for the system
	Crucially, that means that you can always @emph{roll back} to an earlier generation should something go wrong! When you eventually reboot, you'll notice a sub-menu in the bootloader that reads ``Old system generations'': it's what allows you to boot @emph{an older generation of your system}, should the latest generation be ``broken'' or otherwise unsatisfying. You can also ``permanently'' roll back, like so:
	sudo guix system roll-back
	Alternatively, you can use @command{guix system switch-generation} to switch to a specific generation.
	Once in a while, you'll want to delete old generations that you do not need anymore to allow @dfn{garbage collection} to free space (@pxref{Invoking guix gc}). For example, to remove generations older than 4 months, run:
	sudo guix system delete-generations 4m
	From there on, anytime you want to change something in the system configuration, be it adding a user account or changing parameters of a service, you will first update your configuration file and then run @command{guix system reconfigure} as shown above.
	upgrade, of the system
	Likewise, to @emph{upgrade} system software, you first fetch an up-to-date Guix and then reconfigure your system with that new Guix:
	We recommend doing that regularly so that your system includes the latest security updates (@pxref{Security Updates}).
	sudo vs. @command{guix pull}
	@command{sudo guix} runs your user's @command{guix} command and @emph{not} root's, because @command{sudo} leaves @env{PATH} unchanged.
	The difference matters here, because @command{guix pull} updates the @command{guix} command and package definitions only for the user it is run as. This means that if you choose to use @command{guix system reconfigure} in root's login shell, you'll need to @command{guix pull} separately.
	That's it! If you're getting started with Guix entirely, @pxref{Getting Started}. The next sections dive in more detail into the crux of the matter: system configuration.
	The previous section showed the overall workflow you would follow when administering a Guix System machine (@pxref{Getting Started with the System}). Let's now see in more detail what goes into the system configuration file.

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Glossary

English	Dutch
Guix	Guix	guix Glossary
Guix System		guix Glossary

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type: example

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guix-git/doc/guix.texi:17086

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po/doc/guix-manual.nl.po, string 5422