Merge pull request #5212 from mkenigs/auto-uid-allocation

Merge master into #3600

1 files changed, 0 insertions, 107 deletions

diff --git a/doc/manual/installation/multi-user.xml b/doc/manual/installation/multi-user.xml
deleted file mode 100644
index 69ae1ef27..000000000
--- a/doc/manual/installation/multi-user.xml
+++ /dev/null
@@ -1,107 +0,0 @@
-<section xmlns="http://docbook.org/ns/docbook"
-      xmlns:xlink="http://www.w3.org/1999/xlink"
-      xmlns:xi="http://www.w3.org/2001/XInclude"
-      version="5.0"
-      xml:id="ssec-multi-user">
-
-<title>Multi-User Mode</title>
-
-<para>To allow a Nix store to be shared safely among multiple users,
-it is important that users are not able to run builders that modify
-the Nix store or database in arbitrary ways, or that interfere with
-builds started by other users.  If they could do so, they could
-install a Trojan horse in some package and compromise the accounts of
-other users.</para>
-
-<para>To prevent this, the Nix store and database are owned by some
-privileged user (usually <literal>root</literal>) and builders are
-executed under special user accounts (usually named
-<literal>nixbld1</literal>, <literal>nixbld2</literal>, etc.).  When a
-unprivileged user runs a Nix command, actions that operate on the Nix
-store (such as builds) are forwarded to a <emphasis>Nix
-daemon</emphasis> running under the owner of the Nix store/database
-that performs the operation.</para>
-
-<note><para>Multi-user mode has one important limitation: only
-<systemitem class="username">root</systemitem> and a set of trusted
-users specified in <filename>nix.conf</filename> can specify arbitrary
-binary caches. So while unprivileged users may install packages from
-arbitrary Nix expressions, they may not get pre-built
-binaries.</para></note>
-
-
-<simplesect>
-
-<title>Setting up the build users</title>
-
-<para>The <emphasis>build users</emphasis> are the special UIDs under
-which builds are performed.  They should all be members of the
-<emphasis>build users group</emphasis> <literal>nixbld</literal>.
-This group should have no other members.  The build users should not
-be members of any other group. On Linux, you can create the group and
-users as follows:
-
-<screen>
-$ groupadd -r nixbld
-$ for n in $(seq 1 10); do useradd -c "Nix build user $n" \
-    -d /var/empty -g nixbld -G nixbld -M -N -r -s "$(which nologin)" \
-    nixbld$n; done
-</screen>
-
-This creates 10 build users. There can never be more concurrent builds
-than the number of build users, so you may want to increase this if
-you expect to do many builds at the same time.</para>
-
-</simplesect>
-
-
-<simplesect>
-
-<title>Running the daemon</title>
-
-<para>The <link linkend="sec-nix-daemon">Nix daemon</link> should be
-started as follows (as <literal>root</literal>):
-
-<screen>
-$ nix-daemon</screen>
-
-You’ll want to put that line somewhere in your system’s boot
-scripts.</para>
-
-<para>To let unprivileged users use the daemon, they should set the
-<link linkend="envar-remote"><envar>NIX_REMOTE</envar> environment
-variable</link> to <literal>daemon</literal>.  So you should put a
-line like
-
-<programlisting>
-export NIX_REMOTE=daemon</programlisting>
-
-into the users’ login scripts.</para>
-
-</simplesect>
-
-
-<simplesect>
-
-<title>Restricting access</title>
-
-<para>To limit which users can perform Nix operations, you can use the
-permissions on the directory
-<filename>/nix/var/nix/daemon-socket</filename>.  For instance, if you
-want to restrict the use of Nix to the members of a group called
-<literal>nix-users</literal>, do
-
-<screen>
-$ chgrp nix-users /nix/var/nix/daemon-socket
-$ chmod ug=rwx,o= /nix/var/nix/daemon-socket
-</screen>
-
-This way, users who are not in the <literal>nix-users</literal> group
-cannot connect to the Unix domain socket
-<filename>/nix/var/nix/daemon-socket/socket</filename>, so they cannot
-perform Nix operations.</para>
-
-</simplesect>
-
-
-</section>