lfs-book/chapter06/kernfs.xml

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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
<sect1 id="ch-system-kernfs">
<title>Mounting virtual kernel file systems</title>
<?dbhtml filename="kernfs.html"?>

<para>Various file systems exported by the kernel don't exist at all on your
hard drive, but are used to communicate things to and from the kernel itself.</para>

<para>Begin by creating directories onto which the file systems will be mounted:</para>

<screen><userinput>mkdir -p $LFS/{proc,sys}</userinput></screen>

<para>Now mount the file systems:</para>

<screen><userinput>mount -t proc proc $LFS/proc
mount -t sysfs sysfs $LFS/sys</userinput></screen>

<para>Remember that if for any reason you stop working on your BE-LFS, and start
again later, it's important to check that these file systems are mounted again
before entering the chroot environment, otherwise problems could occur.</para>

<para>Shortly, we'll be mounting a few more file systems from within the chroot
environment. To keep the host up-to-date, we'll do a <quote>fake mount</quote>
for each of these now:</para>

<screen><userinput>mount -f -t ramfs ramfs $LFS/dev
mount -f -t tmpfs tmpfs $LFS/dev/shm
mount -f -t devpts -o gid=4,mode=620 devpts $LFS/dev/pts</userinput></screen>

</sect1>