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chapter11/afterlfs.xml
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266
chapter11/afterlfs.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../general.ent">
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%general-entities;
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]>
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<sect1 id="afterlfs">
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<?dbhtml filename="afterlfs.html"?>
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<title>Getting Started After LFS</title>
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<sect2>
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<title>Deciding what to do next</title>
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<para>
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Now that LFS is complete and you have a bootable system, what do you do?
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The next step is to decide how to use it. Generally, there are two broad
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categories to consider: workstation or server. Indeed, these categories
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are not mutually exclusive. The applications needed for each category
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can be combined onto a single system, but let's look at them separately
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for now.
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</para>
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<para>
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A server is the simpler category. Generally this consists of a web
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server such as the
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<ulink url="&blfs-book;server/apache.html">Apache HTTP Server</ulink>
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and a database server such as
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<ulink url="&blfs-book;server/mariadb.html">MariaDB</ulink>.
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However other services are possible. The operating system
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embedded in a single use device falls into this category.
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</para>
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<para>
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On the other hand, a workstation is much more complex. It generally
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requires a graphical user environment such as
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<ulink url="&blfs-book;lxde/lxde.html">LXDE</ulink>,
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<ulink url="&blfs-book;xfce/xfce.html">XFCE</ulink>,
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<ulink url="&blfs-book;kde/kde.html">KDE</ulink>, or
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<ulink url="&blfs-book;gnome/gnome.html">Gnome</ulink>
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based on a basic
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<ulink url="&blfs-book;x/installing.html">graphical environment</ulink>
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and several graphical based applications such as the
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<ulink url="&blfs-book;xsoft/firefox.html">Firefox web browser</ulink>,
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<ulink url="&blfs-book;xsoft/thunderbird.html">Thunderbird email client</ulink>,
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or
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<ulink url="&blfs-book;xsoft/libreoffice.html">LibreOffice office suite</ulink>.
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These applications require many (several hundred depending on
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desired capabilities) more packages of support applications and
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libraries.
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</para>
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<para>
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In addition to the above, there is a set of applications for system
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management for all kinds of systems. These applications are all in the
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BLFS book. Not all packages are needed in every environments. For
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example <ulink url="&blfs-book;basicnet/dhcpcd.html">dhcpcd</ulink>, is
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not normally appropriate for a server and <ulink
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url="&blfs-book;basicnet/wireless_tools.html">wireless_tools</ulink>,
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are normally only useful for a laptop system.
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</para>
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</sect2>
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<sect2>
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<title>Working in a basic LFS environment</title>
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<para>
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When you initially boot into LFS, you have all the internal tools to build
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additional packages. Unfortunately, the user environment is quite sparse.
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There are a couple of ways to improve this:
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</para>
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<sect3>
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<title>Work from the LFS host in chroot</title>
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<para>
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This method provides a complete graphical environment where a full
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featured browser and copy/paste capabilities are available. This method
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allows using applications like the host's version of wget to download
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package sources to a location available when working in the chroot
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envirnment.
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</para>
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<para>
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In order to properly build packages in chroot, you will also need to
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remember to mount the virtual file systems if they are not already
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mounted. One way to do this is to create a script on the
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<emphasis role="bold">HOST</emphasis> system:
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</para>
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<screen><command>cat > ~/mount-virt.sh << "EOF"
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#!/bin/bash
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function mountbind
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{
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if ! mountpoint $LFS/$1 >/dev/null; then
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$SUDO mount --bind /$1 $LFS/$1
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echo $LFS/$1 mounted
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else
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echo $LFS/$1 already mounted
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fi
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}
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function mounttype
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{
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if ! mountpoint $LFS/$1 >/dev/null; then
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$SUDO mount -t $2 $3 $4 $5 $LFS/$1
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echo $LFS/$1 mounted
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else
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echo $LFS/$1 already mounted
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fi
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}
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if [ $EUID -ne 0 ]; then
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SUDO=sudo
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else
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SUDO=""
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fi
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if [ x$LFS == x ]; then
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echo "LFS not set"
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exit 1
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fi
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mountbind dev
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mounttype dev/pts devpts devpts -o gid=5,mode=620
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mounttype proc proc proc
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mounttype sys sysfs sysfs
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mounttype run tmpfs run
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if [ -h $LFS/dev/shm ]; then
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mkdir -pv $LFS/$(readlink $LFS/dev/shm)
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else
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mounttype dev/shm tmpfs tmpfs -o nosuid,nodev
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fi
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#mountbind usr/src
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#mountbind boot
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#mountbind home
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EOF</command></screen>
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<para>
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Note that the last three commands in the script are commented out. These
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are useful if those directories are mounted as separate partitions on the
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host system and will be mounted when booting the completed LFS/BLFS system.
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</para>
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<para>
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The script can be run with <command>bash ~/mount-virt.sh</command> as
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either a regular user (recommended) or as &root;. If run as a regular
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user, sudo is required on the host system.
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</para>
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<para>
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Another issue pointed out by the script is where to store downloaded
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package files. This location is arbitrary. It can be in a regular
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user's home directory such as ~/sources or in a global location like
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/usr/src. Our recommendation is not to mix BLFS sources and LFS sources
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in (from the chroot environment) /sources. In any case, the packages
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must be accessible inside the chroot environment.
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</para>
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<para>
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A last convenience feature presented here is to streamline the process
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of entering the chroot environment. This can be done with an alias
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placed in a user's ~/.bashrc file on the host system:
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</para>
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<screen><command>alias lfs='sudo /usr/sbin/chroot /mnt/lfs /usr/bin/env -i HOME=/root TERM="$TERM" PS1="\u:\w\\\\$ "
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PATH=/bin:/usr/bin:/sbin:/usr/sbin /bin/bash --login'</command></screen>
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<para>
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This alias is a little tricky because of the quoting and levels of
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backslash characters. It must be all on a single line. The above command
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has been split in two for presentation purposes.
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</para>
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</sect3>
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<sect3>
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<title>Work remotely via ssh</title>
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<para>
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This method also provides a full graphical environment, but first
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requires installing
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<ulink url="&blfs-book;postlfs/openssh.html">sshd</ulink> and
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<ulink url="&blfs-book;basicnet/wget.html">wget</ulink>
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on the LFS system, usually in chroot. It also requires a second
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computer. This method has the advantage of being simple by not requiring
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the complexity of the chroot environment. It also uses your LFS built
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kernel for all additional packages and still provides a complete system
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for installing packages.
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</para>
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</sect3>
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<sect3>
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<title>Work from the LFS command line</title>
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<para>
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This method requires installing
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<ulink url="&blfs-book;general/libtasn1.html">libtasn1</ulink>,
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<ulink url="&blfs-book;postlfs/p11-kit.html">p11-kit</ulink>,
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<ulink url="&blfs-book;postlfs/make-ca.html">make-ca</ulink>,
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<ulink url="&blfs-book;basicnet/wget.html">wget</ulink>,
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<ulink url="&blfs-book;general/gpm.html">gpm</ulink>, and
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<ulink url="&blfs-book;basicnet/links.html">links</ulink>
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(or <ulink url="&blfs-book;basicnet/lynx.html">lynx</ulink>)
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in chroot and then rebooting into the new LFS system. At this
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point the default system has six virtual consoles. Switching
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consoles is as easy as using the
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<keycombo>
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<keycap>Alt</keycap>
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<keycap>Fx</keycap>
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</keycombo>
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key combinations where <keycap>Fx</keycap> is
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between <keycap>F1</keycap> and <keycap>F6</keycap>.
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The
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<keycombo>
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<keycap>Alt</keycap>
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<keycap function='left'/>
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</keycombo>
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and
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<keycombo>
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<keycap>Alt</keycap>
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<keycap function='right'/>
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</keycombo>
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combinations also will change the console.
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</para>
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<para>
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At this point you can log into two different virtual consoles and run
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the links or lynx browser in one console and bash in the other. GPM
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then allows copying commands from the browser with the left mouse
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button, switching consoles, and pasting into the other console.
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</para>
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<note>
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<para>
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As a side note, switching of virtual consoles can also be done from
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an X Window instance with the
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<keycombo>
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<keycap>Ctrl</keycap>
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<keycap>Alt</keycap>
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<keycap>Fx</keycap>
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</keycombo>
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key combination, but the mouse copy operation does not work
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between the graphical interface and a virtual console. You can
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return to the X Window display with the
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<keycombo>
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<keycap>Ctrl</keycap>
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<keycap>Alt</keycap>
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<keycap>Fx</keycap>
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</keycombo>
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combination, where <keycap>Fx</keycap> is usually
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<keycap>F1</keycap> but may be <keycap>F7</keycap>.
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</para>
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</note>
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</sect3>
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</sect2>
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</sect1>
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@ -15,5 +15,6 @@
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="getcounted.xml"/>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="getcounted.xml"/>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="reboot.xml"/>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="reboot.xml"/>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="whatnow.xml"/>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="whatnow.xml"/>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="afterlfs.xml"/>
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</chapter>
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</chapter>
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@ -12,7 +12,7 @@
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<para>Теперь, когда вы закончили изучение книги LFS, хотите добавить себя в список
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<para>Теперь, когда вы закончили изучение книги LFS, хотите добавить себя в список
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пользователей LFS? Перейдите по ссылке <ulink url="&lfs-root-en;cgi-bin/lfscounter.php"/>
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пользователей LFS? Перейдите по ссылке <ulink url="&lfs-root-en;cgi-bin/lfscounter.php"/>
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и зарегистрируйтесь. Введите ваше имя и версию LFS которую вы использовали.</para>
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и зарегистрируйтесь. Введите ваше имя и версию LFS, которую вы использовали.</para>
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<para>Давайте выполним перезагрузку в систему LFS.</para>
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<para>Давайте выполним перезагрузку в систему LFS.</para>
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