From 6b9a031ce4df3d911ed8bf07ce753cf306c0286f Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Fri, 06 Jan 2012 23:45:57 -0500
Subject: Add filesystem snapshot section to TBB notes.

---
(limited to 'temporary-bootstrap-builder-setup.txt')

diff --git a/temporary-bootstrap-builder-setup.txt b/temporary-bootstrap-builder-setup.txt
index 9a9403f..fb7658e 100644
--- a/temporary-bootstrap-builder-setup.txt
+++ b/temporary-bootstrap-builder-setup.txt
@@ -165,6 +165,25 @@ Make and change to a directory for package source code.
   $ mkdir -v ${BBL}/src
   $ cd ${BBL}/src
 
+At this point and after every milestone (maybe after each package installation),
+I recommend you create a snapshot of the filesystem.  To do so, first exit the
+shell environment of user 'bbl'.
+  $ exit
+As the superuser, unmount the filesystem.
+  # umount fs
+Make a copy of the filesystem.  Replace '<UNIQUE_NAME>' with something to
+identify the milestone (for example, at this point I named my snapshot image
+'fs.01-fs-hier' to note that it was the first snapshot and that I just finished
+making the filesystem hierarchy).
+  $ cp -p fs fs.<UNIQUE_NAME>
+As the superuser, mount the filesystem again.
+  # mount -o loop fs fsmnt
+Log in as user 'bbl' and return to the src directory in the filesystem.
+  $ su - bbl
+  $ cd ${BBL}/src
+Now, if something goes wrong, you can revert to a previous filesystem image by
+going through this section and swapping the arguments to 'cp'.
+
 Install Linux's headers for use by EGLIBC.
   $ cp -pR ${BBL}/../../src/linux-3.1.6 .
   $ cd linux-3.1.6
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