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<title>
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6.63. Systemd-219
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<h4>
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Linux From Scratch - Version 7.7-systemd
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</h4>
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<h3>
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Chapter 6. Installing Basic System Software
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</h3>
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<ul>
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<li class="prev">
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<a accesskey="p" href="patch.html" title="Patch-2.7.4">Prev</a>
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Patch-2.7.4
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</div>
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<div class="wrap" lang="en" xml:lang="en">
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<h1 class="sect1">
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<a id="ch-system-systemd" name="ch-system-systemd"></a>6.63.
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Systemd-219
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</h1>
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<div class="package" lang="en" xml:lang="en">
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<p>
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The systemd package contains programs for controlling the startup,
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running, and shutdown of the system.
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</p>
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<div class="segmentedlist">
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<div class="seglistitem">
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<div class="seg">
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<strong class="segtitle">Approximate build time:</strong>
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<span class="segbody">2.1 SBU</span>
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</div>
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<div class="seg">
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<strong class="segtitle">Required disk space:</strong>
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<span class="segbody">815 MB</span>
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</div>
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</div>
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</div>
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</div>
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<div class="installation" lang="en" xml:lang="en">
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<h2 class="sect2">
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6.63.1. Installation of systemd
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</h2>
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<p>
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First, create a file to allow systemd to build when using
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Util-Linux built in Chapter 5 and disable LTO by default:
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|
</p>
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<pre class="userinput">
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|
<kbd class="command">cat > config.cache << "EOF"
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<code class="literal">KILL=/bin/kill
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HAVE_BLKID=1
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BLKID_LIBS="-lblkid"
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BLKID_CFLAGS="-I/tools/include/blkid"
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HAVE_LIBMOUNT=1
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MOUNT_LIBS="-lmount"
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MOUNT_CFLAGS="-I/tools/include/libmount"
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cc_cv_CFLAGS__flto=no</code>
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EOF</kbd>
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</pre>
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<p>
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|
LTO is disabled by default because it causes <span class=
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|
"command"><strong>systemd</strong></span> and other auxiliary
|
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programs to link to <code class="filename">libgcc_s.so</code>,
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slows the build down and makes the compiled code larger.
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</p>
|
|
<p>
|
|
Additionally, fix a build error when using Util-Linux built in
|
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Chapter 5:
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</p>
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<pre class="userinput">
|
|
<kbd class="command">sed -i "s:blkid/::" $(grep -rl "blkid/blkid.h")</kbd>
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</pre>
|
|
<p>
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|
Apply the following patch so that compat <span class=
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|
"command"><strong>pkg-config</strong></span> files get installed
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without installing compat libs which are useless on LFS:
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</p>
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<pre class="userinput">
|
|
<kbd class="command">patch -Np1 -i ../systemd-219-compat-1.patch</kbd>
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</pre>
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<p>
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|
Disable a test case that always fails:
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</p>
|
|
<pre class="userinput">
|
|
<kbd class="command">sed -i "s:test/udev-test.pl ::g" Makefile.in</kbd>
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</pre>
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<p>
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Prepare systemd for compilation:
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</p>
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|
<pre class="userinput">
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<kbd class=
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"command">./configure --prefix=/usr \
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--sysconfdir=/etc \
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--localstatedir=/var \
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--config-cache \
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--with-rootprefix= \
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--with-rootlibdir=/lib \
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--enable-split-usr \
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--disable-gudev \
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--disable-firstboot \
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--disable-ldconfig \
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--disable-sysusers \
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--without-python \
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--docdir=/usr/share/doc/systemd-219 \
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--with-dbuspolicydir=/etc/dbus-1/system.d \
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--with-dbussessionservicedir=/usr/share/dbus-1/services \
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--with-dbussystemservicedir=/usr/share/dbus-1/system-services</kbd>
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</pre>
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<div class="variablelist">
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<p class="title">
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<strong>The meaning of the configure options:</strong>
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</p>
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|
<dl class="variablelist">
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<dt>
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<span class="term"><em class=
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|
"parameter"><code>--config-cache</code></em></span>
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</dt>
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<dd>
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<p>
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This switch tells the build system to use the <code class=
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|
"filename">config.cache</code> file which was created
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earlier.
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</p>
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</dd>
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<dt>
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<span class="term"><em class=
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"parameter"><code>--with-root*</code></em></span>
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</dt>
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<dd>
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<p>
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|
These switches ensure that core programs and shared libraries
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are installed in the subdirectories of the root partition.
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</p>
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</dd>
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<dt>
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<span class="term"><em class=
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|
"parameter"><code>--enable-split-usr</code></em></span>
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|
</dt>
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|
<dd>
|
|
<p>
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|
This switch ensures that systemd will work on systems where
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/bin, /lib and /sbin directories are not symlinks to their
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/usr counterparts.
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</p>
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</dd>
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<dt>
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<span class="term"><em class="parameter"><code>--disable-gudev
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--without-python</code></em></span>
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</dt>
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<dd>
|
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<p>
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These switches disable optional features because LFS does not
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provide their dependencies.
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</p>
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</dd>
|
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<dt>
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<span class="term"><em class=
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|
"parameter"><code>--disable-firstboot</code></em></span>
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</dt>
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<dd>
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<p>
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This switch prevents installation of systemd services
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responsible for setting up the system for the first time.
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They are not useful for LFS because everything is done
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manually.
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</p>
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</dd>
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<dt>
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<span class="term"><em class=
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|
"parameter"><code>--disable-ldconfig</code></em></span>
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</dt>
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<dd>
|
|
<p>
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This switch prevents installation of a systemd unit that runs
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<span class="command"><strong>ldconfig</strong></span> at
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boot, making the boot time longer. Remove it if the described
|
|
feature is desired, even though it's not useful for source
|
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distributions such as LFS.
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</p>
|
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</dd>
|
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<dt>
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<span class="term"><em class=
|
|
"parameter"><code>--disable-sysusers</code></em></span>
|
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</dt>
|
|
<dd>
|
|
<p>
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|
This switch prevents installation of systemd services
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responsible for setting up the <code class=
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|
"filename">/etc/group</code> and <code class=
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|
"filename">/etc/passwd</code> files. Both files were created
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early in this chapter.
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|
</p>
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</dd>
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<dt>
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<span class="term"><em class=
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"parameter"><code>--with-dbus*</code></em></span>
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</dt>
|
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<dd>
|
|
<p>
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These switches ensure that D-Bus configuration files get
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installed in the correct locations.
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</p>
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</dd>
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</dl>
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</div>
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<p>
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Compile the package:
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</p>
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|
<pre class="userinput">
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|
<kbd class="command">make LIBRARY_PATH=/tools/lib</kbd>
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</pre>
|
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<p>
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|
This package has a test suite, but it can only be run after the
|
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package has been installed.
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</p>
|
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<p>
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|
Install the package:
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</p>
|
|
<pre class="userinput">
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|
<kbd class="command">make LD_LIBRARY_PATH=/tools/lib install</kbd>
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|
</pre>
|
|
<p>
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|
Move NSS libraries to <code class="filename">/lib</code>:
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|
</p>
|
|
<pre class="userinput">
|
|
<kbd class=
|
|
"command">mv -v /usr/lib/libnss_{myhostname,mymachines,resolve}.so.2 /lib</kbd>
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|
</pre>
|
|
<p>
|
|
Remove an unnecessary directory:
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</p>
|
|
<pre class="userinput">
|
|
<kbd class="command">rm -rfv /usr/lib/rpm</kbd>
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|
</pre>
|
|
<p>
|
|
Create the Sysvinit compatibility symlinks, so systemd is used as
|
|
the default init system:
|
|
</p>
|
|
<pre class="userinput">
|
|
<kbd class=
|
|
"command">for tool in runlevel reboot shutdown poweroff halt telinit; do
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|
ln -sfv ../bin/systemctl /sbin/${tool}
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done
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ln -sfv ../lib/systemd/systemd /sbin/init</kbd>
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|
</pre>
|
|
<p>
|
|
Remove a reference to a non-existent group and fix a configuration
|
|
file so it doesn't cause <span class=
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|
"command"><strong>systemd-tmpfiles</strong></span> to fail at boot:
|
|
</p>
|
|
<pre class="userinput">
|
|
<kbd class=
|
|
"command">sed -i "s:0775 root lock:0755 root root:g" /usr/lib/tmpfiles.d/legacy.conf
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|
sed -i "/pam.d/d" /usr/lib/tmpfiles.d/etc.conf</kbd>
|
|
</pre>
|
|
<p>
|
|
Create the <code class="filename">/etc/machine-id</code> file
|
|
needed by <span class=
|
|
"command"><strong>systemd-journald</strong></span>:
|
|
</p>
|
|
<pre class="userinput">
|
|
<kbd class="command">systemd-machine-id-setup</kbd>
|
|
</pre>
|
|
<p>
|
|
Since the testsuite largely depends on the host system kernel
|
|
configuration, some tests may fail. It also needs a modification in
|
|
order not to look for a program that will be installed by
|
|
Util-Linux package later in this chapter. To test the results,
|
|
issue:
|
|
</p>
|
|
<pre class="userinput">
|
|
<kbd class="command">sed -i "s:minix:ext4:g" src/test/test-path-util.c
|
|
make LD_LIBRARY_PATH=/tools/lib -k check</kbd>
|
|
</pre>
|
|
</div>
|
|
<div class="content" lang="en" xml:lang="en">
|
|
<h2 class="sect2">
|
|
<a id="contents-systemd" name="contents-systemd"></a>6.63.2.
|
|
Contents of systemd
|
|
</h2>
|
|
<div class="segmentedlist">
|
|
<div class="seglistitem">
|
|
<div class="seg">
|
|
<strong class="segtitle">Installed programs:</strong>
|
|
<span class="segbody">bootctl, busctl, coredumpctl, halt,
|
|
hostnamectl, init, journalctl, kernel-install, localectl,
|
|
loginctl, machinectl, networkctl, poweroff, reboot, runlevel,
|
|
shutdown, systemctl, systemd-analyze, systemd-ask-password,
|
|
systemd-cat, systemd-cgls, systemd-cgtop, systemd-delta,
|
|
systemd-detect-virt, systemd-escape, systemd-hwdb,
|
|
systemd-inhibit, systemd-machine-id-setup, systemd-notify,
|
|
systemd-nspawn, systemd-path, systemd-run,
|
|
systemd-stdio-bridge, systemd-tmpfiles,
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|
systemd-tty-ask-password-agent, telinit, timedatectl, and
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|
udevadm</span>
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|
</div>
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|
<div class="seg">
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|
<strong class="segtitle">Installed libraries:</strong>
|
|
<span class="segbody">libnss_myhostname.so.2,
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|
libnss_mymachines.so.2, libnss_resolve.so.2, libsystemd.so, and
|
|
libudev.so</span>
|
|
</div>
|
|
<div class="seg">
|
|
<strong class="segtitle">Installed directories:</strong>
|
|
<span class="segbody">/etc/binfmt.d, /etc/init.d, /etc/kernel,
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|
/etc/modules-load.d, /etc/sysctl.d, /etc/systemd,
|
|
/etc/tmpfiles.d, /etc/udev, /etc/xdg/systemd, /lib/systemd,
|
|
/lib/udev, /usr/include/systemd, /usr/lib/binfmt.d,
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|
/usr/lib/kernel, /usr/lib/modules-load.d, /usr/lib/sysctl.d,
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|
/usr/lib/systemd, /usr/lib/tmpfiles.d,
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|
/usr/share/doc/systemd-219, /usr/share/factory,
|
|
/usr/share/systemd, /var/lib/systemd, and
|
|
/var/log/journal</span>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="variablelist">
|
|
<h3>
|
|
Short Descriptions
|
|
</h3>
|
|
<table border="0" class="variablelist">
|
|
<colgroup>
|
|
<col align="left" valign="top" />
|
|
<col />
|
|
</colgroup>
|
|
<tbody>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="bootctl" name="bootctl"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>bootctl</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
used to query the firmware and boot manager settings
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="busctl" name="busctl"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>busctl</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to introspect and monitor the D-Bus bus
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="coredumpctl" name="coredumpctl"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>coredumpctl</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to retrieve coredumps from the systemd Journal
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="halt" name="halt"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>halt</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Normally invokes <span class=
|
|
"command"><strong>shutdown</strong></span> with the
|
|
<em class="parameter"><code>-h</code></em> option, except
|
|
when already in run-level 0, then it tells the kernel to
|
|
halt the system; it notes in the file <code class=
|
|
"filename">/var/log/wtmp</code> that the system is being
|
|
brought down
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="hostnamectl" name="hostnamectl"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>hostnamectl</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to query and change the system hostname and related
|
|
settings
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="init" name="init"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>init</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
The first process to be started when the kernel has
|
|
initialized the hardware which takes over the boot
|
|
process and starts all the proceses it is instructed to
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="journalctl" name="journalctl"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>journalctl</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to query the contents of the systemd Journal
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="kernel-install" name=
|
|
"kernel-install"></a><span class="term"><span class=
|
|
"command"><strong>kernel-install</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to add and remove kernel and initramfs images to and
|
|
from /boot
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="localectl" name="localectl"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>localectl</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to query and change the system locale and keyboard
|
|
layout settings
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="loginctl" name="loginctl"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>loginctl</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to introspect and control the state of the systemd
|
|
Login Manager
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="machinectl" name="machinectl"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>machinectl</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to introspect and control the state of the systemd
|
|
Virtual Machine and Container Registration Manager
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="networkctl" name="networkctl"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>networkctl</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to introspect the state of the network links as seen
|
|
by systemd-networkd
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="poweroff" name="poweroff"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>poweroff</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Tells the kernel to halt the system and switch off the
|
|
computer (see <span class=
|
|
"command"><strong>halt</strong></span>)
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="reboot" name="reboot"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>reboot</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Tells the kernel to reboot the system (see <span class=
|
|
"command"><strong>halt</strong></span>)
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="runlevel" name="runlevel"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>runlevel</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Reports the previous and the current run-level, as noted
|
|
in the last run-level record in <code class=
|
|
"filename">/var/run/utmp</code>
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="shutdown" name="shutdown"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>shutdown</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Brings the system down in a secure way, signaling all
|
|
processes and notifying all logged-in users
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemctl" name="systemctl"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>systemctl</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to introspect and control the state of the systemd
|
|
system and service manager
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-analyze" name=
|
|
"systemd-analyze"></a><span class="term"><span class=
|
|
"command"><strong>systemd-analyze</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to determine system boot-up performance of the
|
|
current boot
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-ask-password" name=
|
|
"systemd-ask-password"></a><span class=
|
|
"term"><span class="command"><strong>systemd-ask-password</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to query a system password or passphrase from the
|
|
user, using a question message specified on the command
|
|
line
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-cat" name="systemd-cat"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>systemd-cat</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to connect STDOUT and STDERR of a process with the
|
|
Journal
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-cgls" name="systemd-cgls"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>systemd-cgls</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Recursively shows the contents of the selected Linux
|
|
control group hierarchy in a tree
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-cgtop" name=
|
|
"systemd-cgtop"></a><span class="term"><span class=
|
|
"command"><strong>systemd-cgtop</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Shows the top control groups of the local Linux control
|
|
group hierarchy, ordered by their CPU, memory and disk
|
|
I/O load
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-delta" name=
|
|
"systemd-delta"></a><span class="term"><span class=
|
|
"command"><strong>systemd-delta</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to identify and compare configuration files in
|
|
<code class="filename">/etc</code> that override default
|
|
counterparts in <code class="filename">/usr</code>
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-detect-virt" name=
|
|
"systemd-detect-virt"></a><span class="term"><span class=
|
|
"command"><strong>systemd-detect-virt</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Detects execution in a virtualized environment
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-escape" name=
|
|
"systemd-escape"></a><span class="term"><span class=
|
|
"command"><strong>systemd-escape</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to escape strings for inclusion in systemd unit
|
|
names
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-hwdb" name="systemd-hwdb"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>systemd-hwdb</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to manage hardware database (hwdb)
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-inhibit" name=
|
|
"systemd-inhibit"></a><span class="term"><span class=
|
|
"command"><strong>systemd-inhibit</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to execute a program with a shutdown, sleep or idle
|
|
inhibitor lock taken
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-machine-id-setup" name=
|
|
"systemd-machine-id-setup"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>systemd-machine-id-setup</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used by system installer tools to initialize the machine
|
|
ID stored in <code class=
|
|
"filename">/etc/machine-id</code> at install time with a
|
|
randomly generated ID
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-notify" name=
|
|
"systemd-notify"></a><span class="term"><span class=
|
|
"command"><strong>systemd-notify</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used by daemon scripts to notify the init system about
|
|
status changes
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-nspawn" name=
|
|
"systemd-nspawn"></a><span class="term"><span class=
|
|
"command"><strong>systemd-nspawn</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to run a command or OS in a light-weight namespace
|
|
container
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-path" name="systemd-path"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>systemd-path</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to query system and user paths
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-run" name="systemd-run"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>systemd-run</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to create and start a transient .service or a .scope
|
|
unit and run the specified command in it
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-tmpfiles" name=
|
|
"systemd-tmpfiles"></a><span class="term"><span class=
|
|
"command"><strong>systemd-tmpfiles</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Creates, deletes and cleans up volatile and temporary
|
|
files and directories, based on the configuration file
|
|
format and location specified in <code class=
|
|
"filename">tmpfiles.d</code> directories
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="systemd-tty-ask-password-agent" name=
|
|
"systemd-tty-ask-password-agent"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>systemd-tty-ask-password-agent</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to list or process pending systemd password requests
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="telinit" name="telinit"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>telinit</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Tells <span class="command"><strong>init</strong></span>
|
|
which run-level to change to
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="timedatectl" name="timedatectl"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>timedatectl</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Used to query and change the system clock and its
|
|
settings
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="udevadm" name="udevadm"></a><span class=
|
|
"term"><span class=
|
|
"command"><strong>udevadm</strong></span></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
Generic Udev administration tool: controls the udevd
|
|
daemon, provides info from the Udev database, monitors
|
|
uevents, waits for uevents to finish, tests Udev
|
|
configuration, and triggers uevents for a given device
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="libsystemd" name="libsystemd"></a><span class=
|
|
"term"><code class="filename">libsystemd</code></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
systemd utility library
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<p>
|
|
<a id="libudev" name="libudev"></a><span class=
|
|
"term"><code class="filename">libudev</code></span>
|
|
</p>
|
|
</td>
|
|
<td>
|
|
<p>
|
|
A library to access Udev device information
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
</div>
|
|
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