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Full Discussion: Append files (backup .tar)
Top Forums Shell Programming and Scripting Append files (backup .tar) Post 302987892 by peter20 on Saturday 17th of December 2016 11:26:43 AM
Old 12-17-2016
Append files (backup .tar)
Hi all,
I have to write a script which will keep for a particular user (username is first argument) backups of the account area to another.
The script should accept as the second argument is a directory (or file), create one by storing a copy of the argument (using tar) and copies it to the list that defines the third argument.
However, if the third argument is a file (not directory) then simply need to add (append) the copy to be stored in this file.
Code:
#!/bin/bash
if [ $# -ne 3 ]; then
    echo "Illegal number of parameters"
    exit 1
fi

if [ $(who |grep -w "^$0" |wc -l) -eq 0 ]
 then
 echo User $1 is not connected
 exit
fi

if (-F $2) then 
    echo "Argument 2 is folder"
elif (-D $2) then 
    echo "Argument 2 is directory"
fi

if (-F $3) then 
    echo "Argument 3 is folder"
elif (-D $3) then 
    echo "Argument 3 is directory"
fi

mkdir backup

tar -cvf $1.tar backup/
tar -cvf $2.tar $3/
cp $3.tar $3/
cd $3
tar -xvf $2.tar
if [$3 type -f]
$2.tar >> $3
fi

could you help me understand what have I to do ?
 

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LEARN ABOUT DEBIAN

virt-tar-out

virt-tar-out(1) 					      Virtualization Support						   virt-tar-out(1)

NAME

       virt-tar-out - Pack a virtual machine disk image directory into a tarball.

SYNOPSIS

	virt-tar-out -a disk.img /dir files.tar

	virt-tar-out -d domain /dir files.tar

	virt-tar-out -d domain /dir - | gzip --best > files.tar.gz

DESCRIPTION

       "virt-tar-out" packs a virtual machine disk image directory into a tarball.

       The first parameter is the absolute path of the virtual machine directory.  The second parameter is the tar file to write.  Use "-" to
       write to standard output.

EXAMPLES

       Download the home directories from a guest:

	virt-tar-out -d MyGuest /home - | gzip --best > homes.tar.gz

JUST A SHELL SCRIPT WRAPPER AROUND GUESTFISH

       This command is just a simple shell script wrapper around the guestfish(1) "tar-out" command.  For anything more complex than a trivial
       copy, you are probably better off using guestfish directly.

OPTIONS

       Since the shell script just passes options straight to guestfish, read guestfish(1) to see the full list of options.

SEE ALSO

       guestfish(1), virt-cat(1), virt-copy-in(1), virt-copy-out(1), virt-edit(1), virt-tar-in(1), <http://libguestfs.org/>.

AUTHORS

       Richard W.M. Jones ("rjones at redhat dot com")

COPYRIGHT

       Copyright (C) 2011 Red Hat Inc.	<http://libguestfs.org/>

       This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
       the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation,
       Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

libguestfs-1.18.1						    2013-12-07							   virt-tar-out(1)
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