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systemd.xml 26 KB

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  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
  3. "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  4. <!ENTITY % general-entities SYSTEM "../general.ent">
  5. %general-entities;
  6. ]>
  7. <sect1 id="ch-system-systemd" role="wrap" revision="systemd">
  8. <?dbhtml filename="systemd.html"?>
  9. <sect1info condition="script">
  10. <productname>systemd</productname>
  11. <productnumber>&systemd-version;</productnumber>
  12. <address>&systemd-url;</address>
  13. </sect1info>
  14. <title>Systemd-&systemd-version;</title>
  15. <indexterm zone="ch-system-systemd">
  16. <primary sortas="a-systemd">systemd</primary>
  17. </indexterm>
  18. <sect2 role="package">
  19. <title/>
  20. <para>Systemd 软件包包含控制系统引导、运行和关闭的程序。</para>
  21. <segmentedlist>
  22. <segtitle>&buildtime;</segtitle>
  23. <segtitle>&diskspace;</segtitle>
  24. <seglistitem>
  25. <seg>&systemd-ch6-sbu;</seg>
  26. <seg>&systemd-ch6-du;</seg>
  27. </seglistitem>
  28. </segmentedlist>
  29. </sect2>
  30. <sect2 role="installation">
  31. <title>安装 systemd</title>
  32. <para>创建一个符号链接,绕过不存在的 xsltproc:</para>
  33. <screen><userinput remap="pre">ln -sf /tools/bin/true /usr/bin/xsltproc</userinput></screen>
  34. <para>由于还没有安装好最终的 Util-Linux,
  35. 需要在适当的位置创建一些库的符号链接:</para>
  36. <screen><userinput remap="pre">for file in /tools/lib/lib{blkid,mount,uuid}*; do
  37. ln -sf $file /usr/lib/
  38. done</userinput></screen>
  39. <para>设定好 man 页面:</para>
  40. <screen><userinput remap="pre">tar -xf ../systemd-man-pages-&systemd-version;.tar.xz</userinput></screen>
  41. <para>删除在 chroot 环境中无法构建的测试:</para>
  42. <screen><userinput remap="pre">sed '166,$ d' -i src/resolve/meson.build</userinput></screen>
  43. <para>应用一个补丁,以修正使用 glibc-2.28 时构建失败的问题:</para>
  44. <screen><userinput remap="pre">patch -Np1 -i ../systemd-&systemd-version;-glibc_statx_fix-1.patch</userinput></screen>
  45. <para>应用一个补丁,修复使用 meson-0.48.0 构建时出现的错误:</para>
  46. <screen><userinput remap="pre">patch -Np1 -i ../systemd-&systemd-version;-meson-0.48.0_fixes-1.patch</userinput></screen>
  47. <para>从默认的 udev 规则中删除不必要的组
  48. <systemitem class="groupname">render</systemitem>:</para>
  49. <screen><userinput remap="pre">sed -i 's/GROUP="render", //' rules/50-udev-default.rules.in</userinput></screen>
  50. <para>准备安装 systemd:</para>
  51. <screen><userinput remap="configure">mkdir -p build
  52. cd build
  53. PKG_CONFIG_PATH="/usr/lib/pkgconfig:/tools/lib/pkgconfig" \
  54. LANG=en_US.UTF-8 \
  55. meson --prefix=/usr \
  56. --sysconfdir=/etc \
  57. --localstatedir=/var \
  58. -Dblkid=true \
  59. -Dbuildtype=release \
  60. -Ddefault-dnssec=no \
  61. -Dfirstboot=false \
  62. -Dinstall-tests=false \
  63. -Dkill-path=/bin/kill \
  64. -Dkmod-path=/bin/kmod \
  65. -Dldconfig=false \
  66. -Dmount-path=/bin/mount \
  67. -Drootprefix= \
  68. -Drootlibdir=/lib \
  69. -Dsplit-usr=true \
  70. -Dsulogin-path=/sbin/sulogin \
  71. -Dsysusers=false \
  72. -Dumount-path=/bin/umount \
  73. -Db_lto=false \
  74. ..</userinput></screen>
  75. <variablelist>
  76. <title>meson 选项的含义:</title>
  77. <varlistentry>
  78. <term><parameter>-D*-path=*</parameter></term>
  79. <listitem>
  80. <para>这些开关提供了 systemd 在运行时需要的二进制程序的位置,
  81. 这些程序有些尚未安装,有些的 pkgconfig 文件还在
  82. <filename>/tools/lib/pkgconfig</filename> 目录中。</para>
  83. </listitem>
  84. </varlistentry>
  85. <varlistentry>
  86. <term><parameter>-Ddefault-dnssec=no</parameter></term>
  87. <listitem>
  88. <para>这个开关禁用实验性的 DNSSEC 支持。</para>
  89. </listitem>
  90. </varlistentry>
  91. <varlistentry>
  92. <term><parameter>-Dfirstboot=false</parameter></term>
  93. <listitem>
  94. <para>这个开关防止 systemd 安装用于初始化设定系统的服务。
  95. 在 LFS 中所有工作都会手工完成,因此不需要它们。</para>
  96. </listitem>
  97. </varlistentry>
  98. <varlistentry>
  99. <term><parameter>-Dinstall-tests=false</parameter></term>
  100. <listitem>
  101. <para>这个开关防止 systemd 安装编译好的测试文件。</para>
  102. </listitem>
  103. </varlistentry>
  104. <varlistentry>
  105. <term><parameter>-Dldconfig=false</parameter></term>
  106. <listitem>
  107. <para>这个开关防止一个 systemd 单元的安装,它在引导时运行
  108. <command>ldconfig</command>,
  109. 这对于 LFS 等源代码发行版来说没有意义,还会增加引导时间。
  110. 如果您需要这个功能,可以删除这个开关。</para>
  111. </listitem>
  112. </varlistentry>
  113. <varlistentry>
  114. <term><parameter>-Droot*</parameter></term>
  115. <listitem>
  116. <para>这个开关保证核心程序和共享库被安装到 root 分区下的子目录中。
  117. </para>
  118. </listitem>
  119. </varlistentry>
  120. <varlistentry>
  121. <term><parameter>-Dsplit-usr=true</parameter></term>
  122. <listitem>
  123. <para>这个开关确保 systemd 能够在 /bin、/lib 和 /sbin
  124. 目录不是指向 /usr 中对应目录的符号链接的情况下工作。</para>
  125. </listitem>
  126. </varlistentry>
  127. <varlistentry>
  128. <term><parameter>-Dsysusers=false</parameter></term>
  129. <listitem>
  130. <para>这个开关防止 systemd 安装负责设定
  131. <filename>/etc/group</filename> 和
  132. <filename>/etc/passwd</filename> 文件的服务。
  133. 我们在上一章已经创建了这两个文件。</para>
  134. </listitem>
  135. </varlistentry>
  136. </variablelist>
  137. <para>编译该软件包:</para>
  138. <screen><userinput remap="make">LANG=en_US.UTF-8 ninja</userinput></screen>
  139. <!--
  140. <para>To test the package, execute the following command:</para>
  141. <screen><userinput remap="test">LANG=en_US.UTF-8 ninja test</userinput></screen>
  142. -->
  143. <para>安装该软件包:</para>
  144. <screen><userinput remap="install">LANG=en_US.UTF-8 ninja install</userinput></screen>
  145. <para>删除一个不需要的目录:</para>
  146. <screen><userinput remap="install">rm -rfv /usr/lib/rpm
  147. <!--
  148. <para>创建 Sysvinit 兼容性符号链接,使 systemd 被用作默认 init 系统:
  149. </para>
  150. <screen><userinput remap="install">for tool in runlevel reboot shutdown poweroff halt telinit; do
  151. ln -sfv ../bin/systemctl /sbin/${tool}
  152. done
  153. ln -sfv ../lib/systemd/systemd /sbin/init</userinput></screen>
  154. -->
  155. rm -f /usr/bin/xsltproc</userinput></screen>
  156. <para>创建 <command>systemd-journald</command> 需要的
  157. <filename>/etc/machine-id</filename> 文件:</para>
  158. <screen><userinput remap="adjust">systemd-machine-id-setup</userinput></screen>
  159. <para>创建 <filename>/lib/systemd/systemd-user-sessions</filename>
  160. 脚本,使得非特权用户在没有 systemd-logind 的情况下也能登录:</para>
  161. <screen><userinput remap="adjust">cat &gt; /lib/systemd/systemd-user-sessions &lt;&lt; "EOF"
  162. #!/bin/bash
  163. rm -f /run/nologin
  164. EOF
  165. chmod 755 /lib/systemd/systemd-user-sessions</userinput></screen>
  166. </sect2>
  167. <sect2 id="contents-systemd" role="content">
  168. <title>systemd 的内容</title>
  169. <segmentedlist>
  170. <segtitle>安装的程序</segtitle>
  171. <segtitle>安装的库</segtitle>
  172. <segtitle>安装的目录</segtitle>
  173. <seglistitem>
  174. <seg>bootctl, busctl, coredumpctl, halt, hostnamectl, init, journalctl,
  175. kernel-install, localectl, loginctl, machinectl, networkctl, poweroff,
  176. reboot, runlevel, shutdown, systemctl, systemd-analyze,
  177. systemd-ask-password, systemd-cat, systemd-cgls, systemd-cgtop,
  178. systemd-delta, systemd-detect-virt, systemd-escape, systemd-hwdb,
  179. systemd-inhibit, systemd-machine-id-setup, systemd-mount,
  180. systemd-notify, systemd-nspawn, systemd-path, systemd-resolve,
  181. systemd-run, systemd-socket-activate,
  182. systemd-stdio-bridge, systemd-tmpfiles, systemd-tty-ask-password-agent,
  183. telinit, timedatectl, 以及 udevadm</seg>
  184. <seg>libnss_myhostname.so.2, libnss_mymachines.so.2,
  185. libnss_resolve.so.2, libnss_systemd.so.2,
  186. libsystemd.so, libsystemd-shared-231.so,
  187. 以及 libudev.so</seg>
  188. <seg>/etc/binfmt.d, /etc/init.d, /etc/kernel, /etc/modules-load.d,
  189. /etc/sysctl.d, /etc/systemd, /etc/tmpfiles.d, /etc/udev,
  190. /etc/xdg/systemd, /lib/systemd, /lib/udev, /usr/include/systemd,
  191. /usr/lib/binfmt.d, /usr/lib/kernel, /usr/lib/modules-load.d,
  192. /usr/lib/sysctl.d, /usr/lib/systemd, /usr/lib/tmpfiles.d,
  193. /usr/share/doc/systemd-&systemd-version;, /usr/share/factory,
  194. /usr/share/systemd, /var/lib/systemd, 以及 /var/log/journal</seg>
  195. </seglistitem>
  196. </segmentedlist>
  197. <variablelist>
  198. <bridgehead renderas="sect3">简要描述</bridgehead>
  199. <?dbfo list-presentation="list"?>
  200. <?dbhtml list-presentation="table"?>
  201. <varlistentry id="bootctl">
  202. <term><command>bootctl</command></term>
  203. <listitem>
  204. <para>用于查询固件和启动管理器设置</para>
  205. <indexterm zone="ch-system-systemd bootctl">
  206. <primary sortas="b-bootctl">bootctl</primary>
  207. </indexterm>
  208. </listitem>
  209. </varlistentry>
  210. <varlistentry id="busctl">
  211. <term><command>busctl</command></term>
  212. <listitem>
  213. <para>用于探查和监视 D-bus 总线</para>
  214. <indexterm zone="ch-system-systemd busctl">
  215. <primary sortas="b-busctl">busctl</primary>
  216. </indexterm>
  217. </listitem>
  218. </varlistentry>
  219. <varlistentry id="coredumpctl">
  220. <term><command>coredumpctl</command></term>
  221. <listitem>
  222. <para>用于从 systemd 日志获取核心转储</para>
  223. <indexterm zone="ch-system-systemd coredumpctl">
  224. <primary sortas="b-coredumpctl">coredumpctl</primary>
  225. </indexterm>
  226. </listitem>
  227. </varlistentry>
  228. <varlistentry id="halt">
  229. <term><command>halt</command></term>
  230. <listitem>
  231. <para>一般以 <parameter>-h</parameter> 参数调用
  232. <command>shutdown</command> 命令,除非在运行级别已经为 0
  233. 时,则通知内核停止系统;在系统停止运行时它在
  234. <filename>/var/log/wtmp</filename> 中进行记录</para>
  235. <indexterm zone="ch-system-systemd halt">
  236. <primary sortas="b-halt">halt</primary>
  237. </indexterm>
  238. </listitem>
  239. </varlistentry>
  240. <varlistentry id="hostnamectl">
  241. <term><command>hostnamectl</command></term>
  242. <listitem>
  243. <para>查询和修改系统机器名</para>
  244. <indexterm zone="ch-system-systemd hostnamectl">
  245. <primary sortas="b-hostnamectl">hostnamectl</primary>
  246. </indexterm>
  247. </listitem>
  248. </varlistentry>
  249. <varlistentry id="init">
  250. <term><command>init</command></term>
  251. <listitem>
  252. <para>在内核初始化硬件后第一个启动的进程,
  253. 它接管引导过程,并根据它的配置文件启动所有进程。</para>
  254. <indexterm zone="ch-system-systemd init">
  255. <primary sortas="b-init">init</primary>
  256. </indexterm>
  257. </listitem>
  258. </varlistentry>
  259. <varlistentry id="journalctl">
  260. <term><command>journalctl</command></term>
  261. <listitem>
  262. <para>用于查询 systemd 日志的内容</para>
  263. <indexterm zone="ch-system-systemd journalctl">
  264. <primary sortas="b-journalctl">journalctl</primary>
  265. </indexterm>
  266. </listitem>
  267. </varlistentry>
  268. <varlistentry id="kernel-install">
  269. <term><command>kernel-install</command></term>
  270. <listitem>
  271. <para>用于在 /boot 中添加或删除内核和 initramfs 映像文件</para>
  272. <indexterm zone="ch-system-systemd kernel-install">
  273. <primary sortas="b-kernel-install">kernel-install</primary>
  274. </indexterm>
  275. </listitem>
  276. </varlistentry>
  277. <varlistentry id="localectl">
  278. <term><command>localectl</command></term>
  279. <listitem>
  280. <para>用于查询和修改系统 locale 和键盘布局设置</para>
  281. <indexterm zone="ch-system-systemd localectl">
  282. <primary sortas="b-localectl">localectl</primary>
  283. </indexterm>
  284. </listitem>
  285. </varlistentry>
  286. <varlistentry id="loginctl">
  287. <term><command>loginctl</command></term>
  288. <listitem>
  289. <para>用于探查和控制 systemd 登录管理器的状态</para>
  290. <indexterm zone="ch-system-systemd loginctl">
  291. <primary sortas="b-loginctl">loginctl</primary>
  292. </indexterm>
  293. </listitem>
  294. </varlistentry>
  295. <varlistentry id="machinectl">
  296. <term><command>machinectl</command></term>
  297. <listitem>
  298. <para>用于探查和控制 systemd 虚拟机和容器注册管理器的状态</para>
  299. <indexterm zone="ch-system-systemd machinectl">
  300. <primary sortas="b-machinectl">machinectl</primary>
  301. </indexterm>
  302. </listitem>
  303. </varlistentry>
  304. <varlistentry id="networkctl">
  305. <term><command>networkctl</command></term>
  306. <listitem>
  307. <para>用于探查 systemd-networkd 管理的网络连接状态</para>
  308. <indexterm zone="ch-system-systemd networkctl">
  309. <primary sortas="b-networkctl">networkctl</primary>
  310. </indexterm>
  311. </listitem>
  312. </varlistentry>
  313. <varlistentry id="poweroff">
  314. <term><command>poweroff</command></term>
  315. <listitem>
  316. <para>告诉内核停止系统运行并关闭计算机
  317. (见 <command>halt</command>)</para>
  318. <indexterm zone="ch-system-systemd poweroff">
  319. <primary sortas="b-poweroff">poweroff</primary>
  320. </indexterm>
  321. </listitem>
  322. </varlistentry>
  323. <varlistentry id="reboot">
  324. <term><command>reboot</command></term>
  325. <listitem>
  326. <para>告诉内核重启系统 (见
  327. <command>halt</command>)</para>
  328. <indexterm zone="ch-system-systemd reboot">
  329. <primary sortas="b-reboot">reboot</primary>
  330. </indexterm>
  331. </listitem>
  332. </varlistentry>
  333. <varlistentry id="runlevel">
  334. <term><command>runlevel</command></term>
  335. <listitem>
  336. <para>报告当前系统运行级别和上一个运行级别,
  337. 上一个运行级别被记录在 <filename>/var/run/utmp</filename>
  338. 中</para>
  339. <indexterm zone="ch-system-systemd runlevel">
  340. <primary sortas="b-runlevel">runlevel</primary>
  341. </indexterm>
  342. </listitem>
  343. </varlistentry>
  344. <varlistentry id="shutdown">
  345. <term><command>shutdown</command></term>
  346. <listitem>
  347. <para>安全地关闭系统,向所有进程发送信号,并通知所有登录用户
  348. </para>
  349. <indexterm zone="ch-system-systemd shutdown">
  350. <primary sortas="b-shutdown">shutdown</primary>
  351. </indexterm>
  352. </listitem>
  353. </varlistentry>
  354. <varlistentry id="systemctl">
  355. <term><command>systemctl</command></term>
  356. <listitem>
  357. <para>用于探查和控制 systemd 系统和服务管理器的状态</para>
  358. <indexterm zone="ch-system-systemd systemctl">
  359. <primary sortas="b-systemctl">systemctl</primary>
  360. </indexterm>
  361. </listitem>
  362. </varlistentry>
  363. <varlistentry id="systemd-analyze">
  364. <term><command>systemd-analyze</command></term>
  365. <listitem>
  366. <para>用于分析当前运行系统的引导性能</para>
  367. <indexterm zone="ch-system-systemd systemd-analyze">
  368. <primary sortas="b-systemd-analyze">systemd-analyze</primary>
  369. </indexterm>
  370. </listitem>
  371. </varlistentry>
  372. <varlistentry id="systemd-ask-password">
  373. <term><command>systemd-ask-password</command></term>
  374. <listitem>
  375. <para>用于以命令行指定的消息向用户询问系统密码</para>
  376. <indexterm zone="ch-system-systemd systemd-ask-password">
  377. <primary sortas="b-systemd-ask-password">systemd-ask-password</primary>
  378. </indexterm>
  379. </listitem>
  380. </varlistentry>
  381. <varlistentry id="systemd-cat">
  382. <term><command>systemd-cat</command></term>
  383. <listitem>
  384. <para>用于将进程的标准输出和错误输出重定向到系统日志
  385. </para>
  386. <indexterm zone="ch-system-systemd systemd-cat">
  387. <primary sortas="b-systemd-cat">systemd-cat</primary>
  388. </indexterm>
  389. </listitem>
  390. </varlistentry>
  391. <varlistentry id="systemd-cgls">
  392. <term><command>systemd-cgls</command></term>
  393. <listitem>
  394. <para>用树的形式递归地显示指定 Linux 控制组 (cgroup)
  395. 层次结构的内容</para>
  396. <indexterm zone="ch-system-systemd systemd-cgls">
  397. <primary sortas="b-systemd-cgls">systemd-cgls</primary>
  398. </indexterm>
  399. </listitem>
  400. </varlistentry>
  401. <varlistentry id="systemd-cgtop">
  402. <term><command>systemd-cgtop</command></term>
  403. <listitem>
  404. <para>显示本地 Linux 控制组层次结构中占用资源最多的,
  405. 可以按 CPU 、内存和磁盘 I/O 负载排序</para>
  406. <indexterm zone="ch-system-systemd systemd-cgtop">
  407. <primary sortas="b-systemd-cgtop">systemd-cgtop</primary>
  408. </indexterm>
  409. </listitem>
  410. </varlistentry>
  411. <varlistentry id="systemd-delta">
  412. <term><command>systemd-delta</command></term>
  413. <listitem>
  414. <para>用于确定并比较那些覆盖了
  415. <filename class="directory">/usr</filename> 中默认值的
  416. <filename class="directory">/etc</filename>
  417. 中的配置文件</para>
  418. <indexterm zone="ch-system-systemd systemd-delta">
  419. <primary sortas="b-systemd-delta">systemd-delta</primary>
  420. </indexterm>
  421. </listitem>
  422. </varlistentry>
  423. <varlistentry id="systemd-detect-virt">
  424. <term><command>systemd-detect-virt</command></term>
  425. <listitem>
  426. <para>检测系统是否在虚拟化环境下运行</para>
  427. <indexterm zone="ch-system-systemd systemd-detect-virt">
  428. <primary sortas="b-systemd-detect-virt">systemd-detect-virt</primary>
  429. </indexterm>
  430. </listitem>
  431. </varlistentry>
  432. <varlistentry id="systemd-escape">
  433. <term><command>systemd-escape</command></term>
  434. <listitem>
  435. <para>用于转义字符串,以便将其包含在 systemd 单元名中</para>
  436. <indexterm zone="ch-system-systemd systemd-escape">
  437. <primary sortas="b-systemd-escape">systemd-escape</primary>
  438. </indexterm>
  439. </listitem>
  440. </varlistentry>
  441. <varlistentry id="systemd-hwdb">
  442. <term><command>systemd-hwdb</command></term>
  443. <listitem>
  444. <para>用于管理硬件数据库 (hwdb)</para>
  445. <indexterm zone="ch-system-systemd systemd-hwdb">
  446. <primary sortas="b-systemd-hwdb">systemd-hwdb</primary>
  447. </indexterm>
  448. </listitem>
  449. </varlistentry>
  450. <varlistentry id="systemd-inhibit">
  451. <term><command>systemd-inhibit</command></term>
  452. <listitem>
  453. <para>用于在关机、休眠或待机抑制锁被锁定的情况下运行程序</para>
  454. <indexterm zone="ch-system-systemd systemd-inhibit">
  455. <primary sortas="b-systemd-inhibit">systemd-inhibit</primary>
  456. </indexterm>
  457. </listitem>
  458. </varlistentry>
  459. <varlistentry id="systemd-machine-id-setup">
  460. <term><command>systemd-machine-id-setup</command></term>
  461. <listitem>
  462. <para>被系统安装工具用于在安装时以随机生成的 ID 初始化
  463. <filename>/etc/machine-id</filename> 中的机器 ID</para>
  464. <indexterm zone="ch-system-systemd systemd-machine-id-setup">
  465. <primary sortas="b-systemd-machine-id-setup">systemd-machine-id-setup</primary>
  466. </indexterm>
  467. </listitem>
  468. </varlistentry>
  469. <varlistentry id="systemd-mount">
  470. <term><command>systemd-mount</command></term>
  471. <listitem>
  472. <para>一个用于临时挂载或自动挂载驱动器的工具</para>
  473. <indexterm zone="ch-system-systemd systemd-mount">
  474. <primary sortas="b-systemd-mount">systemd-mount</primary>
  475. </indexterm>
  476. </listitem>
  477. </varlistentry>
  478. <varlistentry id="systemd-notify">
  479. <term><command>systemd-notify</command></term>
  480. <listitem>
  481. <para>被守护脚本用于通知 init 系统关于状态变化的信息</para>
  482. <indexterm zone="ch-system-systemd systemd-notify">
  483. <primary sortas="b-systemd-notify">systemd-notify</primary>
  484. </indexterm>
  485. </listitem>
  486. </varlistentry>
  487. <varlistentry id="systemd-nspawn">
  488. <term><command>systemd-nspawn</command></term>
  489. <listitem>
  490. <para>用于在轻量级命名空间容器中运行命令或操作系统</para>
  491. <indexterm zone="ch-system-systemd systemd-nspawn">
  492. <primary sortas="b-systemd-nspawn">systemd-nspawn</primary>
  493. </indexterm>
  494. </listitem>
  495. </varlistentry>
  496. <varlistentry id="systemd-path">
  497. <term><command>systemd-path</command></term>
  498. <listitem>
  499. <para>用于查询系统和用户路径</para>
  500. <indexterm zone="ch-system-systemd systemd-path">
  501. <primary sortas="b-systemd-path">systemd-path</primary>
  502. </indexterm>
  503. </listitem>
  504. </varlistentry>
  505. <varlistentry id="systemd-resolve">
  506. <term><command>systemd-resolve</command></term>
  507. <listitem>
  508. <para>用于解析域名、IPv4 和 IPv6 地址、DNS 资源记录
  509. 以及服务</para>
  510. <indexterm zone="ch-system-systemd systemd-resolve">
  511. <primary sortas="b-systemd-resolve">systemd-resolve</primary>
  512. </indexterm>
  513. </listitem>
  514. </varlistentry>
  515. <varlistentry id="systemd-run">
  516. <term><command>systemd-run</command></term>
  517. <listitem>
  518. <para>用于创建一个临时的 .service 或 .scope 单元,
  519. 并在其中运行指定命令</para>
  520. <indexterm zone="ch-system-systemd systemd-run">
  521. <primary sortas="b-systemd-run">systemd-run</primary>
  522. </indexterm>
  523. </listitem>
  524. </varlistentry>
  525. <!-- <varlistentry id="systemd-stdio-bridge">
  526. <term><command>systemd-stdio-bridge</command></term>
  527. <listitem>
  528. <para>To be completed</para>
  529. <indexterm zone="ch-system-systemd systemd-stdio-bridge">
  530. <primary sortas="b-systemd-stdio-bridge">systemd-stdio-bridge</primary>
  531. </indexterm>
  532. </listitem>
  533. </varlistentry> -->
  534. <varlistentry id="systemd-socket-activate">
  535. <term><command>systemd-socket-activate</command></term>
  536. <listitem>
  537. <para>用于监听 socket 服务,并在连接时启动进程</para>
  538. <indexterm zone="ch-system-systemd systemd-socket-activate">
  539. <primary sortas="b-systemd-socket-activate">systemd-socket-activate</primary>
  540. </indexterm>
  541. </listitem>
  542. </varlistentry>
  543. <varlistentry id="systemd-tmpfiles">
  544. <term><command>systemd-tmpfiles</command></term>
  545. <listitem>
  546. <para>根据
  547. <filename class="directory">tmpfiles.d</filename>
  548. 目录中的配置文件给定的文件格式和位置,
  549. 创建、修改和清理易失性、临时性文件和目录</para>
  550. <indexterm zone="ch-system-systemd systemd-tmpfiles">
  551. <primary sortas="b-systemd-tmpfiles">systemd-tmpfiles</primary>
  552. </indexterm>
  553. </listitem>
  554. </varlistentry>
  555. <varlistentry id="systemd-tty-ask-password-agent">
  556. <term><command>systemd-tty-ask-password-agent</command></term>
  557. <listitem>
  558. <para>列出或处理等待中的 systemd 密码请求</para>
  559. <indexterm zone="ch-system-systemd systemd-tty-ask-password-agent">
  560. <primary sortas="b-systemd-tty-ask-password-agent">systemd-tty-ask-password-agent</primary>
  561. </indexterm>
  562. </listitem>
  563. </varlistentry>
  564. <varlistentry id="telinit">
  565. <term><command>telinit</command></term>
  566. <listitem>
  567. <para>告诉 <command>init</command> 切换到某个运行级别</para>
  568. <indexterm zone="ch-system-systemd telinit">
  569. <primary sortas="b-telinit">telinit</primary>
  570. </indexterm>
  571. </listitem>
  572. </varlistentry>
  573. <varlistentry id="timedatectl">
  574. <term><command>timedatectl</command></term>
  575. <listitem>
  576. <para>用于查询和修改系统时钟及其设置
  577. </para>
  578. <indexterm zone="ch-system-systemd timedatectl">
  579. <primary sortas="b-timedatectl">timedatectl</primary>
  580. </indexterm>
  581. </listitem>
  582. </varlistentry>
  583. <varlistentry id="udevadm">
  584. <term><command>udevadm</command></term>
  585. <listitem>
  586. <para>通用 udev 管理工具:控制 udevd 守护进程,
  587. 提供 udev 数据库的信息,监视 udev 事件 ,等待 udev 事件结束,
  588. 测试 udev 配置,或对于给定设备触发 udev 事件</para>
  589. <indexterm zone="ch-system-systemd udevadm">
  590. <primary sortas="b-udevadm">udevadm</primary>
  591. </indexterm>
  592. </listitem>
  593. </varlistentry>
  594. <varlistentry id="libsystemd">
  595. <term><filename class="libraryfile">libsystemd</filename></term>
  596. <listitem>
  597. <para>主要的 systemd 工具库</para>
  598. <indexterm zone="ch-system-systemd libsystemd">
  599. <primary sortas="c-libsystemd">libsystemd</primary>
  600. </indexterm>
  601. </listitem>
  602. </varlistentry>
  603. <varlistentry id="libudev">
  604. <term><filename class="libraryfile">libudev</filename></term>
  605. <listitem>
  606. <para>用于访问 udev 设备信息的库</para>
  607. <indexterm zone="ch-system-systemd libudev">
  608. <primary sortas="c-libudev">libudev</primary>
  609. </indexterm>
  610. </listitem>
  611. </varlistentry>
  612. </variablelist>
  613. </sect2>
  614. </sect1>