lfs-book-i18n/zh_CN/chapter09/systemd-custom.po

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#. type: Content of: <sect1><title>
msgid "Systemd Usage and Configuration"
msgstr "Systemd 使用和配置"

#. type: Content of: <sect1><indexterm><primary>
msgid "Systemd Customization"
msgstr "Systemd 自定义设置"

#. type: Content of: <sect1><sect2><title>
msgid "Basic Configuration"
msgstr "基础设置"

#. type: Content of: <sect1><sect2><para>
msgid ""
"The <filename>/etc/systemd/system.conf</filename> file contains a set of "
"options to control basic systemd operations. The default file has all "
"entries commented out with the default settings indicated. This file is "
"where the log level may be changed as well as some basic logging settings.  "
"See the <filename>systemd-system.conf(5)</filename> manual page for details "
"on each configuration option."
msgstr ""
"<filename>/etc/systemd/system.conf</filename> 文件包含一组控制 systemd 基本功"
"能的选项。默认文件中所有条目都被注释掉，并标明了默认值。可以在这里修改日志级"
"别，以及其他一些基本日志设定。参阅 <filename>systemd-system.conf(5)</"
"filename> man 手册页面了解每个选项的详细信息。"

#. type: Content of: <sect1><sect2><title>
msgid "Disabling Screen Clearing at Boot Time"
msgstr "禁用引导时自动清屏"

#. type: Content of: <sect1><sect2><para>
msgid ""
"The normal behavior for systemd is to clear the screen at the end of the "
"boot sequence. If desired, this behavior may be changed by running the "
"following command:"
msgstr ""
"Systemd 的默认行为是在引导过程结束时清除屏幕。如果希望的话，您可以运行以下命"
"令，修改这一行为："

#. type: Content of: <sect1><sect2><screen>
#, no-wrap
msgid ""
"<userinput>mkdir -pv /etc/systemd/system/getty@tty1.service.d\n"
"\n"
"cat &gt; /etc/systemd/system/getty@tty1.service.d/noclear.conf &lt;&lt; EOF\n"
"<literal>[Service]\n"
"TTYVTDisallocate=no</literal>\n"
"EOF</userinput>"
msgstr ""
"<userinput>mkdir -pv /etc/systemd/system/getty@tty1.service.d\n"
"\n"
"cat &gt; /etc/systemd/system/getty@tty1.service.d/noclear.conf &lt;&lt; EOF\n"
"<literal>[Service]\n"
"TTYVTDisallocate=no</literal>\n"
"EOF</userinput>"

#. type: Content of: <sect1><sect2><para>
msgid ""
"The boot messages can always be reviewed by using the <userinput>journalctl -"
"b</userinput> command as the root user."
msgstr ""
"您总是可以用 root 身份运行 <userinput>journalctl -b</userinput> 命令，查阅引"
"导消息。"

#. type: Content of: <sect1><sect2><title>
msgid "Disabling tmpfs for /tmp"
msgstr "禁止将 tmpfs 挂载到 /tmp"

#. type: Content of: <sect1><sect2><para>
msgid ""
"By default, <filename class=\"directory\">/tmp</filename> is created as a "
"tmpfs. If this is not desired, it can be overridden by executing the "
"following command:"
msgstr ""
"默认情况下，<filename class=\"directory\">/tmp</filename> 将被挂载 tmpfs 文件"
"系统。如果不希望这样，可以执行以下命令覆盖这一行为："

#. type: Content of: <sect1><sect2><screen>
#, no-wrap
msgid "<userinput>ln -sfv /dev/null /etc/systemd/system/tmp.mount</userinput>"
msgstr "<userinput>ln -sfv /dev/null /etc/systemd/system/tmp.mount</userinput>"

#. type: Content of: <sect1><sect2><para>
msgid ""
"Alternatively, if a separate partition for <filename class=\"directory\">/"
"tmp</filename> is desired, specify that partition in a <filename>/etc/fstab</"
"filename> entry."
msgstr ""
"或者，如果希望使用一个单独的 <filename class=\"directory\">/tmp</filename> 分"
"区，在 <filename>/etc/fstab</filename> 中为其添加一个条目。"

#. type: Content of: <sect1><sect2><warning><para>
msgid ""
"Do not create the symbolic link above if a separate partition is used for "
"<filename class=\"directory\">/tmp</filename>.  This will prevent the root "
"file system (/) from being remounted r/w and make the system unusable when "
"booted."
msgstr ""
"如果使用了单独的 <filename class=\"directory\">/tmp</filename> 分区，不要创建"
"上面的符号链接。这会导致根文件系统 (/) 无法重新挂载为可读写，使得系统在引导后"
"不可用。"

#. type: Content of: <sect1><sect2><title>
msgid "Configuring Automatic File Creation and Deletion"
msgstr "配置文件自动创建和删除"

#. type: Content of: <sect1><sect2><para>
msgid "There are several services that create or delete files or directories:"
msgstr "有一些创建或删除文件、目录的服务："

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid "systemd-tmpfiles-clean.service"
msgstr "systemd-tmpfiles-clean.service"

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid "systemd-tmpfiles-setup-dev.service"
msgstr "systemd-tmpfiles-setup-dev.service"

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid "systemd-tmpfiles-setup.service"
msgstr "systemd-tmpfiles-setup.service"

#. type: Content of: <sect1><sect2><para>
msgid ""
"The system location for the configuration files is <filename>/usr/lib/"
"tmpfiles.d/*.conf</filename>. The local configuration files are in <filename "
"class=\"directory\">/etc/tmpfiles.d</filename>. Files in <filename class="
"\"directory\">/etc/tmpfiles.d</filename> override files with the same name "
"in <filename class=\"directory\">/usr/lib/tmpfiles.d</filename>. See "
"<filename>tmpfiles.d(5)</filename> manual page for file format details."
msgstr ""
"它们的系统配置文件位于 <filename>/usr/lib/tmpfiles.d/*.conf</filename>。本地"
"配置文件位于 <filename class=\"directory\">/etc/tmpfiles.d</filename>。"
"<filename class=\"directory\">/etc/tmpfiles.d</filename> 中的文件覆盖 "
"<filename class=\"directory\">/usr/lib/tmpfiles.d</filename> 中的同名文件。参"
"阅 <filename>tmpfiles.d(5)</filename> man 手册页面，了解配置文件格式的细节。"

#. type: Content of: <sect1><sect2><para><screen>
#, no-wrap
msgid "q /tmp 1777 root root 10d"
msgstr "q /tmp 1777 root root 10d"

#. type: Content of: <sect1><sect2><para>
msgid ""
"Note that the syntax for the <filename>/usr/lib/tmpfiles.d/*.conf</filename> "
"files can be confusing.  For example, the default deletion of files in the /"
"tmp directory is located in <filename>/usr/lib/tmpfiles.d/tmp.conf</"
"filename> with the line: <placeholder type=\"screen\" id=\"0\"/> The type "
"field, q, discusses creating a subvolume with quotas which is really only "
"applicable to btrfs filesystems.  It references type v which in turn "
"references type d (directory). This then creates the specified directory if "
"it is not present and adjusts the permissions and ownership as specified. "
"Contents of the directory will be subject to time based cleanup if the age "
"argument is specified."
msgstr ""
"注意 <filename>/usr/lib/tmpfiles.d/*.conf</filename> 文件的语法较难理解。例"
"如，删除 /tmp 目录下文件的默认规则是文件 <filename>/usr/lib/tmpfiles.d/tmp."
"conf</filename> 的一行：<placeholder type=\"screen\" id=\"0\"/> 类别字段 q 表"
"示创建一个带有配额的子卷，它实际上只适用于 btrfs 文件系统。它引用类别 v，类"
"别 v 又引用类别 d (目录)。对于类别 d，会在目录不存在时自动创建它，并根据配置"
"文件调整其权限和所有者。如果 age 参数被指定，该目录中较老的文件会被自动清理。"

#. type: Content of: <sect1><sect2><para><screen>
#, no-wrap
msgid ""
"<userinput>mkdir -p /etc/tmpfiles.d\n"
"cp /usr/lib/tmpfiles.d/tmp.conf /etc/tmpfiles.d</userinput>"
msgstr ""
"<userinput>mkdir -p /etc/tmpfiles.d\n"
"cp /usr/lib/tmpfiles.d/tmp.conf /etc/tmpfiles.d</userinput>"

#. type: Content of: <sect1><sect2><para>
msgid ""
"If the default parameters are not desired, then the file should be copied to "
"<filename class=\"directory\">/etc/tmpfiles.d</filename> and edited as "
"desired.  For example: <placeholder type=\"screen\" id=\"0\"/>"
msgstr ""
"如果默认参数不符合您的期望，您可以将文件复制到 <filename class=\"directory"
"\">/etc/tmpfiles.d</filename> 目录，再编辑复制得到的副本。例如：<placeholder "
"type=\"screen\" id=\"0\"/>"

#. type: Content of: <sect1><sect2><title>
msgid "Overriding Default Services Behavior"
msgstr "覆盖系统服务默认行为"

#. type: Content of: <sect1><sect2><para>
msgid ""
"The parameters of a unit can be overriden by creating a directory and a "
"configuration file in <filename class=\"directory\">/etc/systemd/system</"
"filename>. For example:"
msgstr ""
"Systemd 单元的参数可以通过在 <filename class=\"directory\">/etc/systemd/"
"system</filename> 中创建一个包含配置文件的目录而覆盖。例如："

#. type: Content of: <sect1><sect2><screen>
#, no-wrap
msgid ""
"<userinput>mkdir -pv /etc/systemd/system/foobar.service.d\n"
"\n"
"cat > /etc/systemd/system/foobar.service.d/foobar.conf &lt;&lt; EOF\n"
"<literal>[Service]\n"
"Restart=always\n"
"RestartSec=30</literal>\n"
"EOF</userinput>"
msgstr ""
"<userinput>mkdir -pv /etc/systemd/system/foobar.service.d\n"
"\n"
"cat > /etc/systemd/system/foobar.service.d/foobar.conf &lt;&lt; EOF\n"
"<literal>[Service]\n"
"Restart=always\n"
"RestartSec=30</literal>\n"
"EOF</userinput>"

#. type: Content of: <sect1><sect2><para>
msgid ""
"See <filename>systemd.unit(5)</filename> manual page for more information. "
"After creating the configuration file, run <userinput>systemctl daemon-"
"reload</userinput> and <userinput>systemctl restart foobar</userinput> to "
"activate the changes to a service."
msgstr ""
"参阅 <filename>systemd.unit(5)</filename> man 手册页面获取更多信息。在创建配"
"置文件后，执行 <userinput>systemctl daemon-reload</userinput> 和 "
"<userinput>systemctl restart foobar</userinput>，激活对服务进行的修改。"

#. type: Content of: <sect1><sect2><title>
msgid "Debugging the Boot Sequence"
msgstr "调试引导过程"

#. type: Content of: <sect1><sect2><para>
msgid ""
"Rather than plain shell scripts used in SysVinit or BSD style init systems, "
"systemd uses a unified format for different types of startup files (or "
"units). The command <command>systemctl</command> is used to enable, disable, "
"control state, and obtain status of unit files. Here are some examples of "
"frequently used commands:"
msgstr ""
"与 SysVinit 或 BSD 风格 init 系统不同，systemd 使用统一格式处理不同种类的引导"
"文件 (或称为单元)。命令 <command>systemctl</command> 能够启用、禁用单元文件，"
"或控制、查询单元文件的状态。以下是一些常用的命令："

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<command>systemctl list-units -t <replaceable>&lt;service&gt;</replaceable> "
"[--all]</command>: lists loaded unit files of type service."
msgstr ""
"<command>systemctl list-units -t <replaceable>&lt;service&gt;</replaceable> "
"[--all]</command>: 列出已加载的服务 (service) 类型单元文件。"

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<command>systemctl list-units -t <replaceable>&lt;target&gt;</replaceable> "
"[--all]</command>: lists loaded unit files of type target."
msgstr ""
"<command>systemctl list-units -t <replaceable>&lt;target&gt;</replaceable> "
"[--all]</command>: 列出已加载的引导目标 (target) 类型单元文件。"

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<command>systemctl show -p Wants <replaceable>&lt;multi-user.target&gt;</"
"replaceable></command>: shows all units that depend on the multi-user "
"target. Targets are special unit files that are anogalous to runlevels under "
"SysVinit."
msgstr ""
"<command>systemctl show -p Wants <replaceable>&lt;multi-user.target&gt;</"
"replaceable></command>: 显示所有依赖于 multi-user 引导目标的单元，引导目标 "
"(target)是一种和 SysVinit 中运行级别 (runlevel) 地位相同的特殊单元文件。"

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<command>systemctl status <replaceable>&lt;servicename.service&gt;</"
"replaceable></command>: shows the status of the servicename service. The ."
"service extension can be omitted if there are no other unit files with the "
"same name, such as .socket files (which create a listening socket that "
"provides similar functionality to inetd/xinetd)."
msgstr ""
"<command>systemctl status <replaceable>&lt;servicename.service&gt;</"
"replaceable></command>: 显示名为 servicename 的服务的状态。如果没有同名的其他"
"类型单元文件，可以省略 .service 后缀。其他类型的单元文件有 .socket 文件 (它创"
"建一个监听套接字，提供和 inetd/xinetd 类似的功能)。"

#. type: Content of: <sect1><sect2><title>
msgid "Working with the Systemd Journal"
msgstr "使用 systemd 日志"

#. type: Content of: <sect1><sect2><para>
msgid ""
"Logging on a system booted with systemd is handled with systemd-journald (by "
"default), rather than a typical unix syslog daemon.  You can also add a "
"normal syslog daemon and have both operate side by side if desired. The "
"systemd-journald program stores journal entries in a binary format rather "
"than a plain text log file. To assist with parsing the file, the command "
"<command>journalctl</command> is provided.  Here are some examples of "
"frequently used commands:"
msgstr ""
"(默认情况下) 在使用 systemd 引导的系统上，systemd-journald 服务负责处理日志，"
"它取代了传统的 Unix syslog 守护进程。如果您希望的话，也可以添加一个普通 "
"syslog 守护进程，它和 systemd-journald 可以一起工作。systemd-journald 程序将"
"日志项储存为二进制格式，而不是纯文本日志文件。为了解析日志文件，需要使用 "
"systemd 提供的 <command>journalctl</command> 命令。下面是该命令的常见用法："

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<command>journalctl -r</command>: shows all contents of the journal in "
"reverse chronological order."
msgstr "<command>journalctl -r</command>：按时间顺序，倒序显示所有日志内容。"

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<command>journalctl -u <replaceable>UNIT</replaceable></command>: shows the "
"journal entries associated with the specified UNIT file."
msgstr ""
"<command>journalctl -u <replaceable>UNIT</replaceable></command>: 显示与给定"
"单元文件 UNIT 关联的日志。"

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<command>journalctl -b[=ID] -r</command>: shows the journal entries since "
"last successful boot (or for boot ID) in reverse chronological order."
msgstr ""
"<command>journalctl -b[=ID] -r</command>: 按时间倒序，显示自上次引导以来 (或"
"编号为 ID 的引导中) 的所有日志。"

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<command>journalctl -f</command>: provides functionality similar to tail -f "
"(follow)."
msgstr ""
"<command>journalctl -f</command>: 提供类似 tail -f 的功能 (不断将新日志项输出"
"到屏幕)。"

#. type: Content of: <sect1><sect2><title>
msgid "Working with Core Dumps"
msgstr "处理核心转储"

#. type: Content of: <sect1><sect2><para>
msgid ""
"Core dumps are useful to debug crashed programs, especially when a daemon "
"process crashes. On systemd booted systems the core dumping is handled by "
"<command>systemd-coredump</command>.  It will log the core dump in the "
"journal and store the core dump itself in <filename class=\"directory\">/var/"
"lib/systemd/coredump</filename>.  To retrieve and process core dumps, the "
"<command>coredumpctl</command> tool is provided.  Here are some examples of "
"frequently used commands:"
msgstr ""
"核心转储在调试崩溃的程序时非常有用，特别是对于守护进程崩溃的情况。在 systemd "
"引导的系统上，核心转储由 <command>systemd-coredump</command> 处理。它会在日志"
"中记录核心转储，并且将核心转储文件本身存储到 <filename class=\"directory\">/"
"var/lib/systemd/coredump</filename> 中。如果要获取和处理核心转储文件，可以使"
"用 <command>coredumpctl</command> 工具。下面给出它的常用命令的示例："

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<command>coredumpctl -r</command>: lists all core dumps in reverse "
"chronological order."
msgstr ""
"<command>coredumpctl -r</command>：按时间顺序，倒序显示所有核心转储记录。"

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<command>coredumpctl -1 info</command>: shows the information from the last "
"core dump."
msgstr "<command>coredumpctl -1 info</command>：显示最近一次核心转储的信息。"

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<command>coredumpctl -1 debug</command>: loads the last core dump into "
"<ulink url=\"&blfs-book;general/gdb.html\">GDB</ulink>."
msgstr ""
"<command>coredumpctl -1 debug</command>：将最后一次核心转储加载到 <ulink url="
"\"&blfs-book;general/gdb.html\">GDB</ulink> 中。"

#. type: Content of: <sect1><sect2><para>
msgid ""
"Core dumps may use a lot of disk space.  The maximum disk space used by core "
"dumps can be limited by creating a configuration file in <filename class="
"\"directory\">/etc/systemd/coredump.conf.d</filename>.  For example:"
msgstr ""
"核心转储可能使用大量磁盘空间。为了限制核心转储使用的最大磁盘空间，可以在 "
"<filename class=\"directory\">/etc/systemd/coredump.conf.d</filename> 中创建"
"一个配置文件。例如："

#. type: Content of: <sect1><sect2><screen>
#, no-wrap
msgid ""
"<userinput>mkdir -pv /etc/systemd/coredump.conf.d\n"
"\n"
"cat &gt; /etc/systemd/coredump.conf.d/maxuse.conf &lt;&lt; EOF\n"
"<literal>[Coredump]\n"
"MaxUse=5G</literal>\n"
"EOF</userinput>"
msgstr ""
"<userinput>mkdir -pv /etc/systemd/coredump.conf.d\n"
"\n"
"cat &gt; /etc/systemd/coredump.conf.d/maxuse.conf &lt;&lt; EOF\n"
"<literal>[Coredump]\n"
"MaxUse=5G</literal>\n"
"EOF</userinput>"

#. type: Content of: <sect1><sect2><para>
msgid ""
"See the <filename>systemd-coredump(8)</filename>, <filename>coredumpctl(1)</"
"filename>, and <filename>coredump.conf.d(5)</filename> manual pages for more "
"information."
msgstr ""
"参阅 man 手册页面 <filename>systemd-coredump(8)</filename>，"
"<filename>coredumpctl(1)</filename>，以及 <filename>coredump.conf.d(5)</"
"filename> 了解更多信息。"

#. type: Content of: <sect1><sect2><title>
msgid "Long Running Processes"
msgstr "持续运行进程"

#. type: Content of: <sect1><sect2><para>
msgid ""
"Beginning with systemd-230, all user processes are killed when a user "
"session is ended, even if nohup is used, or the process uses the "
"<function>daemon()</function> or <function>setsid()</function> functions.  "
"This is a deliberate change from a historically permissive environment to a "
"more restrictive one. The new behavior may cause issues if you depend on "
"long running programs (e.g., <command>screen</command> or <command>tmux</"
"command>) to remain active after ending your user session.  There are three "
"ways to enable lingering processes to remain after a user session is ended."
msgstr ""
"从 systemd 的 230 版本开始，在用户会话结束时，所有用户进程都被杀死，即使使用"
"了 nohup 或 <function>daemon()</function> 、<function>setsid</function> 等函"
"数也不例外。这是开发者有意做出的修改，将传统的宽松环境改为更加严格的环境。如"
"果您需要让持续运行的程序 (例如 <command>screen</command> 或 <command>tmux</"
"command>) 在用户会话结束后保持运行，这项新的行为会导致问题。有三种方法使得这"
"类驻留进程在用户会话结束后继续运行："

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<emphasis>Enable process lingering for only selected users</emphasis>: "
"Normal users have permission to enable process lingering with the command "
"<command>loginctl enable-linger</command> for their own user. System "
"administrators can use the same command with a <parameter>user</parameter> "
"argument to enable for a user. That user can then use the <command>systemd-"
"run</command> command to start long running processes. For example: "
"<command>systemd-run --scope --user /usr/bin/screen</command>. If you enable "
"lingering for your user, the user@.service will remain even after all login "
"sessions are closed, and will automatically start at system boot. This has "
"the advantage of explicitly allowing and disallowing processes to run after "
"the user session has ended, but breaks backwards compatibility with tools "
"like <command>nohup</command> and utilities that use <function>daemon()</"
"function>."
msgstr ""
"<emphasis>仅为选定的用户启用进程驻留</emphasis>：普通用户有执行命令 "
"<command>loginctl enable-linger</command> 启用进程驻留的权限，管理员可以使用"
"带 <parameter>user</parameter> 参数的该命令，为特定用户启用进程驻留。在启用进"
"程驻留后，可以使用 <command>systemd-run</command> 命令启动持续运行的进程。例"
"如，<command>systemd-run --scope --user /usr/bin/screen</command>。如果您为您"
"的用户启用了进程驻留，则 user@.service 将持续运行，甚至在所有登录会话关闭后仍"
"然运行，而且会在系统引导时自动启动。这种方法的好处是可以显式地允许或禁止进程"
"在用户会话结束后继续运行，但却破坏了和 <command>nohup</command> 等工具，和使"
"用 <function>daemon()</function> 函数的工具的兼容性。"

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<emphasis>Enable system-wide process lingering</emphasis>: You can set "
"<parameter>KillUserProcesses=no</parameter> in <filename>/etc/systemd/logind."
"conf</filename> to enable process lingering globally for all users. This has "
"the benefit of leaving the old method available to all users at the expense "
"of explicit control."
msgstr ""
"<emphasis>为整个系统启用进程驻留</emphasis>：您可以在将"
"<parameter>KillUserProcesses=no</parameter> 设置行加入 <filename>/etc/"
"systemd/logind.conf</filename>，为所有用户全局地启用进程驻留。它的好处是允许"
"所有用户继续使用旧方法，但无法进行明确控制。"

#. type: Content of: <sect1><sect2><itemizedlist><listitem><para>
msgid ""
"<emphasis>Disable at build-time</emphasis>: You can disable lingering by "
"default while building systemd by adding the switch <parameter>-Ddefault-"
"kill-user-processes=false</parameter> to the <command>meson</command> "
"command for systemd. This completely disables the ability of systemd to kill "
"user processes at session end."
msgstr ""
"<emphasis>在编译时禁用该功能</emphasis>：您可以在构建 systemd 时传递参数 "
"<parameter>-Ddefault-kill-user-process=no</parameter> 给 <command>meson</"
"command>，使得 systemd 默认启用进程驻留。这完全禁用了 systemd 在会话结束时杀"
"死用户进程的功能。"