lfs-book-i18n/zh_CN/chapter02/aboutlfs.po

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#. type: Content of: <sect1><title>
msgid "Setting The $LFS Variable"
msgstr "设置 $LFS 环境变量"

#. type: Content of: <sect1><para>
msgid ""
"Throughout this book, the environment variable <envar>LFS</envar> will be "
"used several times. You should ensure that this variable is always defined "
"throughout the LFS build process. It should be set to the name of the "
"directory where you will be building your LFS system - we will use <filename "
"class=\"directory\">/mnt/lfs</filename> as an example, but the directory "
"choice is up to you. If you are building LFS on a separate partition, this "
"directory will be the mount point for the partition.  Choose a directory "
"location and set the variable with the following command:"
msgstr ""
"在本书中，我们经常使用环境变量 <envar>LFS</envar>。您应该保证，在构建 LFS 的"
"全过程中，该变量都被定义且设置为您构建 LFS 使用的目录 —— 我们使用 <filename "
"class=\"directory\">/mnt/lfs</filename> 作为例子，但您可以选择其他目录。如果"
"您在一个独立的分区上构建 LFS，那么这个目录将成为该分区的挂载点。选择一个目"
"录，然后用以下命令设置环境变量："

#. type: Content of: <sect1><screen>
#, no-wrap
msgid "<userinput>export LFS=<replaceable>/mnt/lfs</replaceable></userinput>"
msgstr "<userinput>export LFS=<replaceable>/mnt/lfs</replaceable></userinput>"

#. type: Content of: <sect1><para>
msgid ""
"Having this variable set is beneficial in that commands such as "
"<command>mkdir -v $LFS/tools</command> can be typed literally. The shell "
"will automatically replace <quote>$LFS</quote> with <quote>/mnt/lfs</quote> "
"(or whatever the variable was set to) when it processes the command line."
msgstr ""
"设置该环境变量的好处是，我们可以直接输入书中的命令，例如 <command>mkdir -v "
"$LFS/tools</command>。Shell 在解析命令时会自动将 <quote>$LFS</quote> 替换成 "
"<quote>/mnt/lfs</quote> (或是您设置的其他值)。"

#. type: Content of: <sect1><caution><para>
msgid ""
"Do not forget to check that <envar>LFS</envar> is set whenever you leave and "
"reenter the current working environment (such as when doing a <command>su</"
"command> to <systemitem class=\"username\">root</systemitem> or another "
"user). Check that the <envar>LFS</envar> variable is set up properly with:"
msgstr ""
"无论何时，如果您离开并重新进入了工作环境，一定要确认 <envar>LFS</envar> 的设"
"定值和您离开工作环境时相同。(例如，使用 <command>su</command> 切换到 "
"<systemitem class=\"username\">root</systemitem> 或者其他用户时。) 请执行以下"
"命令，检查 <envar>LFS</envar> 的设置是否正确："

#. type: Content of: <sect1><caution><screen>
#, no-wrap
msgid "<userinput>echo $LFS</userinput>"
msgstr "<userinput>echo $LFS</userinput>"

#. type: Content of: <sect1><caution><para>
msgid ""
"Make sure the output shows the path to your LFS system's build location, "
"which is <filename class=\"directory\">/mnt/lfs</filename> if the provided "
"example was followed. If the output is incorrect, use the command given "
"earlier on this page to set <envar>$LFS</envar> to the correct directory "
"name."
msgstr ""
"确认该命令的输出是您构建 LFS 的位置，如果您使用本书提供的例子，那么输出应该"
"是 <filename class=\"directory\">/mnt/lfs</filename>。如果输出不正确，使用前"
"文给出的命令，将 <envar>$LFS</envar> 设置成正确的目录名。"

#. type: Content of: <sect1><note><para>
msgid ""
"One way to ensure that the <envar>LFS</envar> variable is always set is to "
"edit the <filename>.bash_profile</filename> file in both your personal home "
"directory and in <filename>/root/.bash_profile</filename> and enter the "
"export command above.  In addition, the shell specified in the <filename>/"
"etc/passwd</filename> file for all users that need the <envar>LFS</envar> "
"variable needs to be bash to ensure that the <filename>/root/.bash_profile</"
"filename> file is incorporated as a part of the login process."
msgstr ""
"确保 <envar>LFS</envar> 始终正确的一种方法是：编辑您的主目录中的 <filename>."
"bash_profile</filename>，以及<filename>/root/.bash_profile</filename>，为它们"
"加入上述设置并导出 LFS 变量的 export 命令。还要确认 <filename>/etc/passwd</"
"filename> 中为每个需要使用 <envar>LFS</envar> 变量的用户指定的 shell 都是 "
"bash，以保证每次登录时都执行 <filename>.bash_profile</filename> 中的命令。"

#. type: Content of: <sect1><note><para>
msgid ""
"Another consideration is the method that is used to log into the host "
"system.  If logging in through a graphical display manager, the user's "
"<filename>.bash_profile</filename> is not normally used when a virtual "
"terminal is started.  In this case, add the export command to the <filename>."
"bashrc</filename> file for the user and root.  In addition, some "
"distributions have instructions to not run the <filename>.bashrc</filename> "
"instructions in a non-interactive bash invocation.  Be sure to add the "
"export command before the test for non-interactive use."
msgstr ""
"另外还要考虑登录宿主系统的方式，如果您使用图形显示管理器登录，再启动虚拟终"
"端，那么 <filename>.bash_profile</filename> 一般不会被虚拟终端执行。此时，应"
"该将 export 命令加入到您使用的用户和 root 用户的 <filename>.bashrc</"
"filename> 文件中。另外，如果以非交互模式启动 bash，有的发行版不会执行 "
"<filename>.bashrc</filename> 中的指令。此时一定要在使用环境变量前添加 export "
"命令。"