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  • chapter09/introduction.xml

    r59d5489 rc30b3cc  
    1212
    1313    <para>Booting a Linux system involves several tasks.  The process must
    14     mount both virtual and real file systems, initialize devices, activate swap,
    15     check file systems for integrity, mount any swap partitions or files, set
     14    mount both virtual and real file systems, initialize devices,
     15    check file systems for integrity, mount and activate any swap partitions or files, set
    1616    the system clock, bring up networking, start any daemons required by the
    17     system, and accomplish any other custom tasks needed by the user.  This
     17    system, and accomplish any other custom tasks specified by the user.  This
    1818    process must be organized to ensure the tasks are performed in the correct
    19     order but, at the same time, be executed as fast as possible.</para>
     19    order and executed as quickly as possible.</para>
    2020
    2121  <sect2 id='sysv-desc'>
     
    2424    <para>System V is the classic boot process that has been used in Unix and
    2525    Unix-like systems such as Linux since about 1983.  It consists of a small
    26     program, <command>init</command>, that sets up basic programs such as
     26    program, <command>init</command>, that sets up basic processes such as
    2727    <command>login</command> (via getty) and runs a script.  This script,
    2828    usually named <command>rc</command>,  controls the execution of a set of
     
    3232    <para>The <command>init</command> program is controlled by the
    3333    <filename>/etc/inittab</filename> file and is organized into run levels that
    34     can be run by the user. In LFS, they are used as follows:</para>
     34    can be chosen by the user. In LFS, they are used as follows:</para>
    3535
    3636<literallayout>0 &mdash; halt
     
    7171      <listitem>
    7272          <para>Serial processing of boot tasks. This is related to the previous
    73           point.  A delay in any process such as a file system check, will
     73          point.  A delay in any process, such as a file system check, will
    7474          delay the entire boot process.</para>
    7575      </listitem>
     
    7777      <listitem>
    7878          <para>Does not directly support advanced features like
    79           control groups (cgroups), and per-user fair share scheduling.</para>
     79          control groups (cgroups) and per-user fair share scheduling.</para>
    8080      </listitem>
    8181
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