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Revert "nixos/doc: recommend usage of --use-remote-sudo when switching configurations"

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Fernando Rodrigues 2025-03-18 11:34:07 +00:00 • committed by GitHub
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30
nixos/doc/manual/installation/changing-config.chapter.md
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@ -5,13 +5,12 @@ configuration of your machine. Whenever you've [changed
something](#ch-configuration) in that file, you should do something](#ch-configuration) in that file, you should do
```ShellSession ```ShellSession
$ nixos-rebuild switch --use-remote-sudo # nixos-rebuild switch
``` ```
to build the new configuration as your current user, and as the root user, to build the new configuration, make it the default configuration for
make it the default configuration for booting. `switch` will also try to booting, and try to realise the configuration in the running system
realise the configuration in the running system (e.g., by restarting system (e.g., by restarting system services).
services).
::: {.warning} ::: {.warning}
This command doesn't start/stop [user services](#opt-systemd.user.services) This command doesn't start/stop [user services](#opt-systemd.user.services)
@ -20,23 +19,14 @@ user services.
::: :::
::: {.warning} ::: {.warning}
Applying a configuration is an action that must be done by the root user, so the These commands must be executed as root, so you should either run them
`switch`, `boot` and `test` commands should be ran with the `--use-remote-sudo` from a root shell or by prefixing them with `sudo -i`.
flag. Despite its odd name, this flag runs the activation script with elevated
permissions, regardless of whether or not the target system is remote, without
affecting the other stages of the `nixos-rebuild` call. This allows unprivileged
users to rebuild the system and only elevate their permissions when necessary.
Alternatively, one can run the whole command as root while preserving user
environment variables by prefixing the command with `sudo -E`. However, this
method may create root-owned files in `$HOME/.cache` if Nix decides to use the
cache during evaluation.
::: :::
You can also do You can also do
```ShellSession ```ShellSession
$ nixos-rebuild test --use-remote-sudo # nixos-rebuild test
``` ```
to build the configuration and switch the running system to it, but to build the configuration and switch the running system to it, but
@ -47,7 +37,7 @@ configuration.
There is also There is also
```ShellSession ```ShellSession
$ nixos-rebuild boot --use-remote-sudo # nixos-rebuild boot
``` ```
to build the configuration and make it the boot default, but not switch to build the configuration and make it the boot default, but not switch
@ -57,7 +47,7 @@ You can make your configuration show up in a different submenu of the
GRUB 2 boot screen by giving it a different *profile name*, e.g. GRUB 2 boot screen by giving it a different *profile name*, e.g.
```ShellSession ```ShellSession
$ nixos-rebuild switch -p test --use-remote-sudo # nixos-rebuild switch -p test
``` ```
which causes the new configuration (and previous ones created using which causes the new configuration (and previous ones created using
@ -68,7 +58,7 @@ configurations.
A repl, or read-eval-print loop, is also available. You can inspect your configuration and use the Nix language with A repl, or read-eval-print loop, is also available. You can inspect your configuration and use the Nix language with
```ShellSession ```ShellSession
$ nixos-rebuild repl # nixos-rebuild repl
``` ```
Your configuration is loaded into the `config` variable. Use tab for autocompletion, use the `:r` command to reload the configuration files. See `:?` or [`nix repl` in the Nix manual](https://nixos.org/manual/nix/stable/command-ref/new-cli/nix3-repl.html) to learn more. Your configuration is loaded into the `config` variable. Use tab for autocompletion, use the `:r` command to reload the configuration files. See `:?` or [`nix repl` in the Nix manual](https://nixos.org/manual/nix/stable/command-ref/new-cli/nix3-repl.html) to learn more.