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Top Forums UNIX for Dummies Questions & Answers backup : files being modified while tarring Post 8518 by jamesbond on Friday 12th of October 2001 05:10:04 PM
Old 10-12-2001
backup : files being modified while tarring

I would like to back up several directories weekly using a cronjob.

I'm not experienced in UNIX, but I would start like this:

tar -cvf backup.tar dir1 dir2 dir3

Now if a file is being modified in the process it will result in an error.

How can I prevent this from happening and how can I determine if the backup has been succesful ?

Last edited by jamesbond; 10-12-2001 at 07:16 PM..
 

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

NAME
bup-join - concatenate files from a bup repository SYNOPSIS
bup join [-r host:path] [refs or hashes...] DESCRIPTION
bup join is roughly the opposite operation to bup-split(1). You can use it to retrieve the contents of a file from a local or remote bup repository. The supplied list of refs or hashes can be in any format accepted by git(1), including branch names, commit ids, tree ids, or blob ids. If no refs or hashes are given on the command line, bup join reads them from stdin instead. OPTIONS
-r, --remote=host:path Retrieves objects from the given remote repository instead of the local one. path may be blank, in which case the default remote repository is used. The connection to the remote server is made with SSH. If you'd like to specify which port, user or private key to use for the SSH connection, we recommend you use the ~/.ssh/config file. EXAMPLE
# split and then rejoin a file using its tree id TREE=$(tar -cvf - /etc | bup split -t) bup join $TREE | tar -tf - # make two backups, then get the second-most-recent. # mybackup~1 is git(1) notation for the second most # recent commit on the branch named mybackup. tar -cvf - /etc | bup split -n mybackup tar -cvf - /etc | bup split -n mybackup bup join mybackup~1 | tar -tf - SEE ALSO
bup-split(1), bup-save(1), ssh_config(5) BUP
Part of the bup(1) suite. AUTHORS
Avery Pennarun <apenwarr@gmail.com>. Bup unknown- bup-join(1)
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