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diff --git a/sag-0.6.1-www/Invisible/sag-0.6/node101.html b/sag-0.6.1-www/Invisible/sag-0.6/node101.html new file mode 100644 index 0000000..0f72190 --- /dev/null +++ b/sag-0.6.1-www/Invisible/sag-0.6/node101.html @@ -0,0 +1,93 @@ +<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> +<!--Converted with LaTeX2HTML 96.1-h (September 30, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds --> +<HTML> +<HEAD> +<TITLE>Making backups with tar</TITLE> +<META NAME="description" CONTENT="Making backups with tar"> +<META NAME="keywords" CONTENT="sag"> +<META NAME="resource-type" CONTENT="document"> +<META NAME="distribution" CONTENT="global"> +<LINK REL=STYLESHEET HREF="sag.css"> +</HEAD> +<BODY LANG="EN" > + <A NAME="tex2html1591" HREF="node102.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="./next_motif.gif"></A> <A NAME="tex2html1589" HREF="node100.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="./up_motif.gif"></A> <A NAME="tex2html1583" HREF="node100.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="./previous_motif.gif"></A> <A NAME="tex2html1593" HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="./contents_motif.gif"></A> <A NAME="tex2html1594" HREF="node114.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="./index_motif.gif"></A> <BR> +<B> Next:</B> <A NAME="tex2html1592" HREF="node102.html">Restoring files with tar</A> +<B>Up:</B> <A NAME="tex2html1590" HREF="node100.html">Simple backups</A> +<B> Previous:</B> <A NAME="tex2html1584" HREF="node100.html">Simple backups</A> +<BR> <P> +<A NAME="3054"> </A><H2><A NAME="SECTION001141000000000000000">Making backups with <tt>tar</tt></A></H2> +<P> + A full backup can easily be made with <tt>tar</tt><A NAME="3056"> </A>: + <BLOCKQUOTE> <TT> +# tar -create -file /dev/ftape /usr/src <BR> +tar: Removing leading / from absolute path names in the archive <BR> +# + </TT></BLOCKQUOTE> + The example above uses the GNU version of <tt>tar</tt><A NAME="3058"> </A> and its long option + names. The traditional version of <tt>tar</tt><A NAME="3060"> </A> only understands single + character options. The GNU version can also handle + backups that don't fit on one tape or floppy, and also very long + paths; not all traditional versions can do these things. (Linux + only uses GNU <tt>tar</tt><A NAME="3062"> </A>.) +<P> + If your backup doesn't fit on one tape, you need to use the + <tt>-multi-volume</tt> (<tt>-M</tt>) option: + <BLOCKQUOTE> <TT> +# tar -cMf /dev/fd0H1440 /usr/src <BR> +tar: Removing leading / from absolute path names in the archive <BR> +Prepare volume #2 for /dev/fd0H1440 and hit return: <BR> +# + </TT></BLOCKQUOTE> + Note that you should format the floppies before you begin the backup, + or else use another window or virtual terminal and do it when <tt>tar</tt><A NAME="3064"> </A> + asks for a new floppy. +<P> + After you've made a backup, you should check that it is OK, using + the <tt>-compare</tt> (<tt>-d</tt>) option: + <BLOCKQUOTE> <TT> +# tar -compare -verbose -f /dev/ftape <BR> +usr/src/ <BR> +usr/src/linux <BR> +usr/src/linux-1.2.10-includes/ <BR> +.... <BR> +# + </TT></BLOCKQUOTE> + Failing to check a backup means that you will not notice that your + backups aren't working until after you've lost the original data. +<P> + An incremental backup can be done with <tt>tar</tt><A NAME="3066"> </A> using the + <tt>-newer</tt> (<tt>-N</tt>) option: + <BLOCKQUOTE> <TT> +# tar -create -newer '8 Sep 1995' -file /dev/ftape /usr/src -verbose <BR> +tar: Removing leading / from absolute path names in the archive <BR> +usr/src/ <BR> +usr/src/linux-1.2.10-includes/ <BR> +usr/src/linux-1.2.10-includes/include/ <BR> +usr/src/linux-1.2.10-includes/include/linux/ <BR> +usr/src/linux-1.2.10-includes/include/linux/modules/ <BR> +usr/src/linux-1.2.10-includes/include/asm-generic/ <BR> +usr/src/linux-1.2.10-includes/include/asm-i386/ <BR> +usr/src/linux-1.2.10-includes/include/asm-mips/ <BR> +usr/src/linux-1.2.10-includes/include/asm-alpha/ <BR> +usr/src/linux-1.2.10-includes/include/asm-m68k/ <BR> +usr/src/linux-1.2.10-includes/include/asm-sparc/ <BR> +usr/src/patch-1.2.11.gz <BR> +# + </TT></BLOCKQUOTE> + Unfortunately, <tt>tar</tt><A NAME="3068"> </A> can't notice when a file's inode information + has changed, for example, that it's permission bits have been + changed, or when its name has been changed. This can be worked + around using <tt>find</tt><A NAME="3070"> </A> and comparing current filesystem state with + lists of files that have been previously backed up. Scripts and + programs for doing this can be found on Linux ftp sites. +<P> +<HR><A NAME="tex2html1591" HREF="node102.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="./next_motif.gif"></A> <A NAME="tex2html1589" HREF="node100.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="./up_motif.gif"></A> <A NAME="tex2html1583" HREF="node100.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="./previous_motif.gif"></A> <A NAME="tex2html1593" HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="./contents_motif.gif"></A> <A NAME="tex2html1594" HREF="node114.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="./index_motif.gif"></A> <BR> +<B> Next:</B> <A NAME="tex2html1592" HREF="node102.html">Restoring files with tar</A> +<B>Up:</B> <A NAME="tex2html1590" HREF="node100.html">Simple backups</A> +<B> Previous:</B> <A NAME="tex2html1584" HREF="node100.html">Simple backups</A> +<P><ADDRESS> +<I>Lars Wirzenius <BR> +Sat Nov 15 02:32:11 EET 1997</I> +</ADDRESS> +</BODY> +</HTML> |