X-Git-Url: http://git.grml.org/?p=grml-live.git;a=blobdiff_plain;f=docs%2Fgrml-live.txt;h=293cfd22054e017722b7ce5caac8152b66f776b5;hp=7e56bbd92be3a4cefad2385311b8a8dccf8133c3;hb=83d621a9e61c969169b90b75619aacd12637564c;hpb=25317dad266075062fbdf9fe85d26f3936a4cf17

diff --git a/docs/grml-live.txt b/docs/grml-live.txt
index 7e56bbd..293cfd2 100644
--- a/docs/grml-live.txt
+++ b/docs/grml-live.txt
@@ -14,7 +14,7 @@ grml-live [-a <architecture>] [-c <classe[s]>] [-C <configfile>] [
 -e <extract_iso_name>] [-g <grml_name>] [-i <iso_name>] [
 -o <output_directory>] [-r <release_name>] [-s <suite>] [
 -t <template_directory>] [-v <version_number>] [-U <username>] [
--AbBFnNqQuVz]
+-w <date>] [-AbBFnNqQuVz]
 
 Description
 -----------
@@ -232,6 +232,22 @@ Specify version number of the release.
 
 Increase verbosity in the build process.
 
+  -w **DATE**::
+
+The wayback machine. Build the system using Debian archives from the specified
+date.  Valid date formats are yyyymmddThhmmssZ or simply yyyymmdd.  To learn
+which snapshots exist, i.e. which date strings are valid, simply browse the
+lists on http://snapshot.debian.org/.  If there is no import at the exact time
+you specified you will get the latest available timestamp which is before the
+time you specified.
+This option is useful especially for release and debugging builds - for example
+if you know that the Debian archive was in a good state on a specific date but
+you want to build it on another day in the future, where the archive might not
+be as needed anymore. Please be aware that this is restricted to the plain
+Debian repositories only, as referred to in /etc/apt/sources.list.d/debian.list
+(so neither the Grml repositories nor any further custom ones are affected by
+the wayback machine).
+
   -z::
 
 Use ZLIB instead of LZMA/XZ compression in mksquashfs part of the build process.
@@ -475,9 +491,8 @@ For further information see next section.
 Current state of grml-live with squashfs-tools and kernel
 ---------------------------------------------------------
 
-Use squashfs-tools >=4.2-1 (available from Grml repositories as well as from
-Debian) to build Grml (based) ISOs featuring kernel version 2.6.38-grml[64] or
-newer.
+Use squashfs-tools >=4.2-1 to build Grml (based) ISOs featuring kernel version
+2.6.38-grml[64] or newer.
 
 [[faq]]
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