<!doctype refentry PUBLIC "-//OASIS//DTD DocBook V4.1//EN" [

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  <!-- Fill in your name for FIRSTNAME and SURNAME. -->
  <!ENTITY dhfirstname "<firstname>Matt</firstname>">
  <!ENTITY dhsurname   "<surname>Zimmerman</surname>">
  <!-- Please adjust the date whenever revising the manpage. -->
  <!ENTITY dhdate      "<date>December  5, 2001</date>">
  <!-- SECTION should be 1-8, maybe w/ subsection other parameters are
       allowed: see man(7), man(1). -->
  <!ENTITY dhsection   "<manvolnum>1</manvolnum>">
  <!ENTITY dhemail     "<email>mdz@debian.org</email>">
  <!ENTITY dhusername  "Matt Zimmerman">
  <!ENTITY dhucpackage "<refentrytitle>UML_MCONSOLE</refentrytitle>">
  <!ENTITY dhpackage   "uml_mconsole">

  <!ENTITY debian      "<productname>Debian GNU/Linux</productname>">
  <!ENTITY gnu         "<acronym>GNU</acronym>">
]>

<refentry>
  <refentryinfo>
    <address>
      &dhemail;
    </address>
    <author>
      &dhfirstname;
      &dhsurname;
    </author>
    <copyright>
      <year>2001</year>
      <holder>&dhusername;</holder>
    </copyright>
    &dhdate;
  </refentryinfo>
  <refmeta>
    &dhucpackage;

    &dhsection;
  </refmeta>
  <refnamediv>
    <refname>&dhpackage;</refname>

    <refpurpose>attach to the management console of a user-mode Linux
    kernel</refpurpose>
  </refnamediv>
  <refsynopsisdiv>
    <cmdsynopsis>
      <command>&dhpackage;</command>

      <arg><replaceable>socket</replaceable></arg>

      <arg choice=opt rep=repeat><replaceable>command</replaceable></arg>

    </cmdsynopsis>
  </refsynopsisdiv>
  <refsect1>
    <title>DESCRIPTION</title>

    <para>This manual page documents briefly the
      <command>&dhpackage;</command> command.</para>

    <para>This manual page was written for the &debian; distribution
      because the original program does not have a manual page.</para>

    <para><command>&dhpackage;</command> is a program to connect to
    the management console of a user-mode Linux kernel.  The UML
    management console is a low-level interface to the kernel,
    somewhat like the i386 SysRq interface. Since there is a
    full-blown operating system under UML, there is much greater
    flexibility possible than with the SysRq mechanism.</para>

  </refsect1>
  <refsect1>
    <title>OPTIONS</title>

    <variablelist>
      <varlistentry>
        <term><replaceable>socket</replaceable></term>
        <listitem>
          <para>The pathname of the socket to which to connect.  This
          is printed when UML boots, for example:
          <screen>
            mconsole initialized on /tmp/umlNJ32yL/mconsole
          </screen>
          </para>

          <para>In this example, you would start uml_mconsole like
          this:
            <screen>
              <userinput>uml_mconsole umlNJ32yL</userinput>
            </screen>
          </para>
        </listitem>
      </varlistentry>
      <varlistentry>
        <term><replaceable>command</replaceable></term>
        <listitem>
          <para>Any of the commands listed in the
          &ldquo;COMMANDS&rdquo; section.</para>
        </listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

  <refsect1>
    <title>COMMANDS</title>

    <variablelist>
      <varlistentry>
        <term>version</term>
        <listitem>
          <para>Prints the UML version number.</para>
        </listitem>
      </varlistentry>
    </variablelist>

    <variablelist>
      <varlistentry>
        <term>halt</term>
        <listitem>
          <para>Shuts down the UML system immediately, without syncing
          disks or cleanly shutting down swap space.</para>
        </listitem>
      </varlistentry>
    </variablelist>

    <variablelist>
      <varlistentry>
        <term>reboot</term>
        <listitem>
          <para>Reboots the UML system immediately, without syncing
          disks or cleanly shutting down swap space.</para>
        </listitem>
      </varlistentry>
    </variablelist>

    <variablelist>
      <varlistentry>
        <term>log <replaceable>string</replaceable></term>
        <listitem>
          <para>Cause UML to log <replaceable>string</replaceable> to
          the kernel log.</para>
        </listitem>
      </varlistentry>
    </variablelist>

    <variablelist>
      <varlistentry>
        <term>cad</term>
        <listitem>
          <para>Invokes the Control-Alt-Delete handler.</para>
        </listitem>
      </varlistentry>
    </variablelist>

    <variablelist>
      <varlistentry>
        <term>sysrq <replaceable>letter</replaceable></term>
        <listitem>
          <para>Performs the SysRq action controlled by
          <replaceable>letter</replaceable>.</para>
        </listitem>
      </varlistentry>
    </variablelist>

    <variablelist>
      <varlistentry>
        <term>stop</term>
        <listitem>
          <para>Pauses UML.  UML will do nothing until the 'go'
          command is issued.</para>
        </listitem>
      </varlistentry>
    </variablelist>

    <variablelist>
      <varlistentry>
        <term>go</term>
        <listitem>
          <para>Resumes execution after a 'stop' command.</para>
        </listitem>
      </varlistentry>
    </variablelist>

    <variablelist>
      <varlistentry>
        <term>config <option><replaceable>device</replaceable></option></term>
        <listitem>
          <para>Adds a new device to the virtual machine, or queries
          the configuration of an existing device.  It takes one
          argument, which is either the device to add, with the same
          syntax as the kernel command line, or the name of an
          existing device.  For example:</para>

            <informalexample>
              <screen>
<prompt>(mconsole)</prompt> <userinput>config ubd3=root_fs_debian22</userinput>

OK
              </screen>
            </informalexample>

            <informalexample>
              <screen>
<prompt>(mconsole)</prompt> <userinput>config ubd3</userinput>

OK root_fs_debian22
              </screen>
            </informalexample>

        </listitem>
      </varlistentry>
    </variablelist>

    <variablelist>
      <varlistentry>
        <term>remove</term>
        <listitem>
          <para>Deletes a device from the virtual machine.  Its
          argument is the name of the device to be removed.  In the
          case of the ubd driver, the removed block device must not be
          mounted, swapped on, or otherwise open, and in the case of
          the network driver, the device must be down.</para>

          <informalexample>
            <screen>
<prompt>(mconsole)</prompt> <userinput>remove ubd3</userinput>

OK
              </screen>
          </informalexample>
        </listitem>
      </varlistentry>
    </variablelist>

  </refsect1>
  
  <refsect1>
    <title>SEE ALSO</title>

    <para>linux(1)</para>

    <para>The <ulink
    url="http://user-mode-linux.sourceforge.net/UserModeLinux-HOWTO.html"
    type=alternate>UserModeLinux-HOWTO</ulink></para>
  </refsect1>
  <refsect1>
    <title>AUTHOR</title>

    <para>&dhpackage; was written by Jeff Dike and others.</para>

    <para>This manual page was written by &dhusername; &dhemail; for
      the &debian; system, based on material in the
      UserModeLinux-HOWTO by Rusty Russell, and the uml_mconsole
      source code.</para>

  </refsect1>
</refentry>

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