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Full Discussion: GNUTAR exclude directories
Top Forums UNIX for Advanced & Expert Users GNUTAR exclude directories Post 35560 by Perderabo on Thursday 17th of April 2003 11:44:19 AM
Old 04-17-2003
We seem to have several problems here....

xargs collects as many arguments as will fit on a line and then invokes the given program. A find command might find 1000's of files. So rather than, say, doing an "rm" 1000's of times, it better to use xargs. Then you may only use a few dozen rm commands, each one having a full argument list.

But this doesn't extend to "tar cvf /some/file". If you have too many arguments for one command line, you will get two command lines. The second "tar cvf /some/file" will overwrite the contents of the first. If you are not encountering this problem, you must not have very many files.

Next, when you ask tar to backup a directory, it will backup the contents of the directory as well.
So:
tar cvf /tmp/data.tar /appl/data /appl/data/somefile
is not going to backup one directory and one file. That "/appl/data" will cause tar to pick up the whole thing. The /appl/data/somefile will put a second copy of somefile in the archive. Your find command will output /appl/data as its first line. That already gets you everything.

And none of this has anything at all to do with exclude files which is where the thread started.

What you're supposed to do is to create a file and put the stuff in it that you want to exclude. So, for example, edit the file /tmp/ExcludeFile and put in the following two lines:
/appl/data/temp1
/appl/data/temp2
Then use the command:
tar cvfX /tmp/datadir.tar /tmp/ExcludeFile /appl/data
 

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bup-drecurse(1) 					      General Commands Manual						   bup-drecurse(1)

NAME
bup-drecurse - recursively list files in your filesystem SYNOPSIS
bup drecurse [-x] [-q] [--exclude path] [--exclude-from filename] [--profile] <path> DESCRIPTION
bup drecurse traverses files in the filesystem in a way similar to find(1). In most cases, you should use find(1) instead. This program is useful mainly for testing the file traversal algorithm used in bup-index(1). Note that filenames are returned in reverse alphabetical order, as in bup-index(1). This is important because you can't generate the hash of a parent directory until you have generated the hashes of all its children. When listing files in reverse order, the parent directory will come after its children, making this easy. OPTIONS
-x, --xdev, --one-file-system don't cross filesystem boundaries. -q, --quiet don't print filenames as they are encountered. Useful when testing performance of the traversal algorithms. --exclude=path a path to exclude from the backup (can be used more than once) --exclude-from=filename a file that contains exclude paths (can be used more than once) --profile print profiling information upon completion. Useful when testing performance of the traversal algorithms. EXAMPLE
bup drecurse -x / SEE ALSO
bup-index(1) BUP
Part of the bup(1) suite. AUTHORS
Avery Pennarun <apenwarr@gmail.com>. Bup unknown- bup-drecurse(1)
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