X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=man%2Fsystemd.special.xml;h=38b94a7657ed49a86c4390f7f4734e714f285467;hb=06c17c39a8345deef1ecff4dd5ef262f968c9be2;hp=7dbc5580e26e20d620004dd8bbe96184d177ad8d;hpb=fade1ec6e05f9f6c3718be622e259d2c8e61508c;p=elogind.git

diff --git a/man/systemd.special.xml b/man/systemd.special.xml
index 7dbc5580e..38b94a765 100644
--- a/man/systemd.special.xml
+++ b/man/systemd.special.xml
@@ -385,7 +385,7 @@
                                         this unit during
                                         installation. This is best
                                         configured via
-                                        <varname>WantedBy=multi-uer.target</varname>
+                                        <varname>WantedBy=multi-user.target</varname>
                                         in the unit's
                                         <literal>[Install]</literal>
                                         section.</para>
@@ -448,7 +448,7 @@
                                         after it. Note that networking
                                         daemons that simply provide
                                         functionality to other hosts
-                                        generally don't need to pull
+                                        generally do not need to pull
                                         this in.</para>
                                         </listitem>
                         </varlistentry>
@@ -820,7 +820,7 @@
                 services. These targets are generally not part of the
                 initial boot transaction, unless they are explicitly
                 pulled in by one of the implementing services. Note
-                specifically, that these <emphasis>passive</emphasis>
+                specifically that these <emphasis>passive</emphasis>
                 target units are generally not pulled in by the
                 consumer of a service, but by the provider of the
                 service. This means: a consuming service should order
@@ -866,7 +866,13 @@
                                         will be stopped before the
                                         network -- to whatever level
                                         it might be set up then -- is
-                                        shut down. Also see <ulink
+                                        shut down. It is hence useful
+                                        when writing service files
+                                        that require network access on
+                                        shutdown, which should order
+                                        themselves after this target,
+                                        but not pull it in. Also see
+                                        <ulink
                                         url="http://www.freedesktop.org/wiki/Software/systemd/NetworkTarget">Running
                                         Services After the Network is
                                         up</ulink> for more
@@ -882,7 +888,6 @@
                                         an LSB header referring to the
                                         <literal>$network</literal>
                                         facility.</para>
-
                                 </listitem>
                         </varlistentry>
                         <varlistentry>
@@ -896,7 +901,12 @@
                                         user/group name lookups for
                                         which
                                         <filename>nss-user-lookup.target</filename>
-                                        should be used. systemd
+                                        should be used. All services
+                                        for which the availability of
+                                        full host/network name
+                                        resolution is essential should
+                                        be ordered after this target,
+                                        but not pull it in. systemd
                                         automatically adds
                                         dependencies of type
                                         <varname>After=</varname> for
@@ -918,7 +928,16 @@
                                         host/network name lookups for
                                         which
                                         <filename>nss-lookup.target</filename>
-                                        should be used. </para>
+                                        should be used. All services
+                                        for which the availability of
+                                        the full user/group database is
+                                        essential should be ordered
+                                        after this target, but not
+                                        pull it in. Note that system
+                                        users are always resolvable,
+                                        and hence do not require any
+                                        special ordering against this
+                                        target.</para>
                                 </listitem>
                         </varlistentry>
                         <varlistentry>
@@ -939,23 +958,22 @@
                                         <varname>Wants=</varname> type
                                         dependency. If the unit wants
                                         to be pulled in by the first
-                                        remote mount showing up it
+                                        remote mount showing up, it
                                         should use
                                         <filename>network-online.target</filename>
                                         (see above).</para>
-
-                                        <para>Again, this target unit
-                                        is <emphasis>not</emphasis>
-                                        suitable for pulling in other
-                                        units, it is only useful for
-                                        ordering.</para>
                                 </listitem>
                         </varlistentry>
                         <varlistentry>
                                 <term><filename>rpcbind.target</filename></term>
                                 <listitem>
-                                        <para>systemd automatically
-                                        adds dependencies of type
+                                        <para>The portmapper/rpcbind
+                                        pulls in this target and
+                                        orders itself before it, to
+                                        indicate its
+                                        availability. systemd
+                                        automatically adds
+                                        dependencies of type
                                         <varname>After=</varname> for
                                         this target unit to all SysV
                                         init script service units with
@@ -967,14 +985,24 @@
                         <varlistentry>
                                 <term><filename>time-sync.target</filename></term>
                                 <listitem>
-                                        <para>systemd automatically
-                                        adds dependencies of type
+                                        <para>Services responsible for
+                                        synchronizing the system clock
+                                        from a remote source (such as
+                                        NTP client implementations)
+                                        should pull in this target and
+                                        order themselves before
+                                        it. All services where correct
+                                        time is essential should be
+                                        ordered after this unit, but
+                                        not pull it in. systemd
+                                        automatically adds
+                                        dependencies of type
                                         <varname>After=</varname> for
                                         this target unit to all SysV
                                         init script service units with
                                         an LSB header referring to the
                                         <literal>$time</literal>
-                                        facility.</para>
+                                        facility. </para>
                                 </listitem>
                         </varlistentry>
                 </variablelist>
@@ -996,7 +1024,7 @@
                 <filename>smartcard.target</filename>,
                 <filename>sound.target</filename>.</para>
 
-                <para>In addition the following special unit is
+                <para>In addition, the following special unit is
                 understood only when systemd runs as service instance:</para>
 
                 <variablelist>
@@ -1012,7 +1040,7 @@
                                         manager should start this
                                         unit. If systemd receives
                                         <constant>SIGTERM</constant> or <constant>SIGINT</constant> when running
-                                        as user service daemon it will
+                                        as user service daemon, it will
                                         start this unit.</para>
 
                                         <para>Normally, this pulls in
@@ -1039,40 +1067,44 @@
                                 <term><filename>-.slice</filename></term>
                                 <listitem>
                                         <para>The root slice is the
-                                        root of the hierarchy. It does
-                                        not contain services directly,
-                                        but is used to set defaults
-                                        for the whole tree.</para>
+                                        root of the hierarchy. It
+                                        usually does not contain units
+                                        directly, but may be used to
+                                        set defaults for the whole
+                                        tree.</para>
                                 </listitem>
                         </varlistentry>
 
                         <varlistentry>
                                 <term><filename>system.slice</filename></term>
                                 <listitem>
-                                        <para>This slice contains
+                                        <para>By default, all services
                                         services started by
-                                        <command>systemd</command>.</para>
+                                        <command>systemd</command> are
+                                        found in this slice.</para>
                                 </listitem>
                         </varlistentry>
 
                         <varlistentry>
                                 <term><filename>user.slice</filename></term>
                                 <listitem>
-                                        <para>This slice contains user
+                                        <para>By default, all user
                                         processes and services started
                                         on behalf of the user,
                                         including the per-user systemd
-                                        instance.</para>
+                                        instance are found in this
+                                        slice.</para>
                                 </listitem>
                         </varlistentry>
 
                         <varlistentry>
                                 <term><filename>machine.slice</filename></term>
                                 <listitem>
-                                        <para>This slice contains
-                                        virtual machines and
-                                        containers registered with
-                                        <command>systemd-machined</command>.
+                                        <para>By defalt, all virtual
+                                        machines and containers
+                                        registered with
+                                        <command>systemd-machined</command>
+                                        are found in this slice.
                                         </para>
                                 </listitem>
                         </varlistentry>