diff options
| -rw-r--r-- | man/nss-myhostname.xml | 6 | ||||
| -rw-r--r-- | man/systemctl.xml | 9 | ||||
| -rw-r--r-- | man/systemd-resolved.service.xml | 6 | ||||
| -rw-r--r-- | man/systemd.service.xml | 2 | ||||
| -rw-r--r-- | man/systemd.special.xml | 37 | ||||
| -rw-r--r-- | man/systemd.unit.xml | 65 |
6 files changed, 67 insertions, 58 deletions
diff --git a/man/nss-myhostname.xml b/man/nss-myhostname.xml index 859bec29e3..251bdecbad 100644 --- a/man/nss-myhostname.xml +++ b/man/nss-myhostname.xml @@ -71,9 +71,9 @@ is on the local loopback) and the IPv6 address ::1 (which is the local host).</para></listitem> - <listitem><para>The hostname <literal>localhost</literal> is - resolved to the IP addresses 127.0.0.1 and - ::1.</para></listitem> + <listitem><para>The hostname <literal>localhost</literal> (as well as any hostname ending in + <literal>.localhost</literal>, <literal>.localdomain</literal> or equal to <literal>localdomain</literal>) is + resolved to the IP addresses 127.0.0.1 and ::1.</para></listitem> <listitem><para>The hostname <literal>gateway</literal> is resolved to all current default routing gateway addresses, diff --git a/man/systemctl.xml b/man/systemctl.xml index cce7861139..50eb939313 100644 --- a/man/systemctl.xml +++ b/man/systemctl.xml @@ -1134,7 +1134,7 @@ kobject-uevent 1 systemd-udevd-kernel.socket systemd-udevd.service <tbody> <row> <entry><literal>enabled</literal></entry> - <entry morerows='1'>Enabled through creating symlinks encoded in the <literal>[Install]</literal> section (permanently or just in <filename>/run</filename>).</entry> + <entry morerows='1'>Enabled via <filename>.wants/</filename>, <filename>.requires/</filename> or alias symlinks (permanently in <filename>/etc/systemd/system/</filename>, or transiently in <filename>/run/systemd/system/</filename>).</entry> <entry morerows='1'>0</entry> </row> <row> @@ -1703,7 +1703,7 @@ kobject-uevent 1 systemd-udevd-kernel.socket systemd-udevd.service unit specifications (designated as <replaceable>PATTERN</replaceable>...). In the first case, the unit name with or without a suffix must be given. If the suffix - is not specified, systemctl will append a suitable suffix, + is not specified ("abbreviated"), systemctl will append a suitable suffix, <literal>.service</literal> by default, and a type-specific suffix in case of commands which operate only on specific unit types. For example, @@ -1740,9 +1740,8 @@ kobject-uevent 1 systemd-udevd-kernel.socket systemd-udevd.service loaded are not considered for glob expansion. </para> - <para>For unit file commands, the specified - <replaceable>NAME</replaceable> should be the full name of the - unit file, or the absolute path to the unit file: + <para>For unit file commands, the specified <replaceable>NAME</replaceable> should be the name of the unit file + (possibly abbreviated, see above), or the absolute path to the unit file: <programlisting># systemctl enable foo.service</programlisting> or <programlisting># systemctl link /path/to/foo.service</programlisting> diff --git a/man/systemd-resolved.service.xml b/man/systemd-resolved.service.xml index 1b63afdded..4b4ea52aba 100644 --- a/man/systemd-resolved.service.xml +++ b/man/systemd-resolved.service.xml @@ -87,9 +87,9 @@ is on the local loopback) and the IPv6 address ::1 (which is the local host).</para></listitem> - <listitem><para>The hostname <literal>localhost</literal> is - resolved to the IP addresses 127.0.0.1 and - ::1.</para></listitem> + <listitem><para>The hostname <literal>localhost</literal> (as well as any hostname ending in + <literal>.localhost</literal>, <literal>.localdomain</literal> or equal to <literal>localdomain</literal>) is + resolved to the IP addresses 127.0.0.1 and ::1.</para></listitem> <listitem><para>The hostname <literal>gateway</literal> is resolved to all current default routing gateway addresses, diff --git a/man/systemd.service.xml b/man/systemd.service.xml index 2145e33d05..d7760d4f2c 100644 --- a/man/systemd.service.xml +++ b/man/systemd.service.xml @@ -371,7 +371,7 @@ with a <literal>-</literal> exit successfully.</para> <para><varname>ExecStartPost=</varname> commands are only run after - the service has started, as determined by <varname>Type=</varname> + the service has started successfully, as determined by <varname>Type=</varname> (i.e. the process has been started for <varname>Type=simple</varname> or <varname>Type=idle</varname>, the process exits successfully for <varname>Type=oneshot</varname>, the initial process exits successfully diff --git a/man/systemd.special.xml b/man/systemd.special.xml index 0a37f65956..055d854555 100644 --- a/man/systemd.special.xml +++ b/man/systemd.special.xml @@ -204,12 +204,22 @@ <varlistentry> <term><filename>emergency.target</filename></term> <listitem> - <para>A special target unit that starts an emergency shell - on the main console. This unit is supposed to be used with - the kernel command line option - <varname>systemd.unit=</varname> and has otherwise little - use. - </para> + <para>A special target unit that starts an emergency shell on the main console. This target does not pull in + any serices or mounts. It is the most minimal version of starting the system in order to acquire an + interactive shell; the only processes running are usually just the system manager (PID 1) and the shell + process. This unit is supposed to be used with the kernel command line option + <varname>systemd.unit=</varname>; it is also used when a file system check on a required file system fails, + and boot-up cannot continue. Compare with <filename>rescue.target</filename>, which serves a similar purpose, + but also starts the most basic services and mounts all file systems.</para> + + <para>Use the <literal>systemd.unit=emergency.target</literal> kernel command line option to boot into this + mode. A short alias for this kernel command line option is <literal>emergency</literal>, for compatibility + with SysV.</para> + + <para>In many ways booting into <filename>emergency.target</filename> is similar to the effect of booting + with <literal>init=/bin/sh</literal> on the kernel command line, except that emergency mode provides you with + the full system and service manager, and allows starting individual units in order to continue the boot + process in steps.</para> </listitem> </varlistentry> <varlistentry> @@ -440,11 +450,18 @@ <varlistentry> <term><filename>rescue.target</filename></term> <listitem> - <para>A special target unit for setting up the base system - and a rescue shell.</para> + <para>A special target unit that pulls in the base system (including system mounts) and spawns a rescue + shell. Isolate to this target in order to administer the system in single-user mode with all file systems + mounted but with no services running, except for the most basic. Compare with + <filename>emergency.target</filename>, which is much more reduced and does not provide the file systems or + most basic services.</para> - <para><filename>runlevel1.target</filename> is an alias for - this target unit, for compatibility with SysV.</para> + <para><filename>runlevel1.target</filename> is an alias for this target unit, for compatibility with + SysV.</para> + + <para>Use the <literal>systemd.unit=rescue.target</literal> kernel command line option to boot into this + mode. A short alias for this kernel command line option is <literal>1</literal>, for compatibility with + SysV.</para> </listitem> </varlistentry> <varlistentry> diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml index 46b288f20b..16aded89d1 100644 --- a/man/systemd.unit.xml +++ b/man/systemd.unit.xml @@ -178,18 +178,14 @@ directory suffix is <filename>.requires/</filename> in this case.</para> - <para>Along with a unit file <filename>foo.service</filename>, a - directory <filename>foo.service.d/</filename> may exist. All files - with the suffix <literal>.conf</literal> from this directory will - be parsed after the file itself is parsed. This is useful to alter - or add configuration settings to a unit, without having to modify - their unit files. Make sure that the file that is included has the - appropriate section headers before any directive. Note that, for - instanced units, this logic will first look for the instance - <literal>.d/</literal> subdirectory and read its - <literal>.conf</literal> files, followed by the template - <literal>.d/</literal> subdirectory and reads its - <literal>.conf</literal> files.</para> + <para>Along with a unit file <filename>foo.service</filename>, a "drop-in" directory + <filename>foo.service.d/</filename> may exist. All files with the suffix <literal>.conf</literal> from this + directory will be parsed after the file itself is parsed. This is useful to alter or add configuration settings to + a unit, without having to modify their unit files. Make sure that the file that is included has the appropriate + section headers before any directive. Note that for instanced units, this logic will first look for the instance + <literal>.d/</literal> subdirectory and read its <literal>.conf</literal> files, followed by the template + <literal>.d/</literal> subdirectory and reads its <literal>.conf</literal> files. Also note that settings from the + <literal>[Install]</literal> section are not available in drop-in unit files, and have no effect.</para> <para>In addition to <filename>/etc/systemd/system</filename>, the drop-in <literal>.conf</literal> files for system services @@ -827,13 +823,14 @@ useful and probably just confusing. --> - <listitem><para>Before starting a unit verify that the - specified condition is true. If it is not true, the starting - of the unit will be skipped, however all ordering dependencies - of it are still respected. A failing condition will not result - in the unit being moved into a failure state. The condition is - checked at the time the queued start job is to be - executed.</para> + <listitem><para>Before starting a unit, verify that the specified condition is true. If it is not true, the + starting of the unit will be (mostly silently) skipped, however all ordering dependencies of it are still + respected. A failing condition will not result in the unit being moved into a failure state. The condition is + checked at the time the queued start job is to be executed. Use condition expressions in order to silently skip + units that do not apply to the local running system, for example because the kernel or runtime environment + doesn't require its functionality. Use the various <varname>AssertArchitecture=</varname>, + <varname>AssertVirtualization=</varname>, … options for a similar mechanism that puts the unit in a failure + state and logs about the failed check (see below).</para> <para><varname>ConditionArchitecture=</varname> may be used to check whether the system is running on a specific @@ -1067,14 +1064,12 @@ <term><varname>AssertFileNotEmpty=</varname></term> <term><varname>AssertFileIsExecutable=</varname></term> - <listitem><para>Similar to the - <varname>ConditionArchitecture=</varname>, - <varname>ConditionVirtualization=</varname>, etc., condition - settings described above, these settings add assertion checks - to the start-up of the unit. However, unlike the conditions - settings, any assertion setting that is not met results in - failure of the start job it was triggered - by.</para></listitem> + <listitem><para>Similar to the <varname>ConditionArchitecture=</varname>, + <varname>ConditionVirtualization=</varname>, …, condition settings described above, these settings add + assertion checks to the start-up of the unit. However, unlike the conditions settings, any assertion setting + that is not met results in failure of the start job it was triggered by (which means this is logged about + loudly). Use assertion expressions for units that cannot operate when specific requirements are not met, and + where this is something the administrator or user should look into.</para></listitem> </varlistentry> <varlistentry> @@ -1094,15 +1089,13 @@ <refsect1> <title>[Install] Section Options</title> - <para>Unit file may include an <literal>[Install]</literal> - section, which carries installation information for the unit. This - section is not interpreted by - <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry> - during runtime. It is used exclusively by the - <command>enable</command> and <command>disable</command> commands - of the - <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry> - tool during installation of a unit:</para> + <para>Unit files may include an <literal>[Install]</literal> section, which carries installation information for + the unit. This section is not interpreted by + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry> during runtime; it is + used by the <command>enable</command> and <command>disable</command> commands of the + <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry> tool during + installation of a unit. Note that settings in the <literal>[Install]</literal> section may not appear in + <filename>.d/*.conf</filename> unit file drop-ins (see above).</para> <variablelist class='unit-directives'> <varlistentry> |