hard drive specs? Post: 49590

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Operating Systems Linux hard drive specs? Post 49590 by TioTony on Tuesday 6th of April 2004 12:02:49 AM

04-06-2004

Registered User

It just takes time to learn all this. I have a degree in computer science and have been working with Unix and Linux for about 10 years. My best advice is read a lot and play with any hardware and OSes you can get your hands on. The cool thing about Linux and Unix is there is always more to learn. It's pretty much infinite for all practical purposes. Even guys like Perdarabo probably still learn new things pretty frequently. I can only hope to learn as much as he already knows.

For the tar command:

tar cf - /FTPFiles/*. This part creates a tar of all the files tar are in /FTPFiles. The "-" after the cf part just redirects the contents of the tar file to STDOUT instead of to a file. This is where the pipe comes in.

The | takes the STDOUT and redirects it to the next set of commands as STDIN. The () make these work as 1 unit. First we cd to /disk2/ftpfiles then is "untars" the data passed via -. The tar xf - uses "-" the same as the tar cf did. It opens what was STDOUT and has been changed to STDIN by the | to expand the archive. Basically you are using - as a file to pass info without actually creating a file on disk.

Your error may be caused if /FTPFiles doesn't have any files in it yet.

TioTony

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virt-tar-in

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

NAME

       virt-tar-in - Unpack a tarball into a virtual machine disk image.

SYNOPSIS

	virt-tar-in -a disk.img data.tar /destination

	virt-tar-in -d domain data.tar /destination

	zcat data.tar.gz | virt-tar-in -d domain - /destination

WARNING

       Using "virt-tar-in" on live virtual machines can be dangerous, potentially causing disk corruption.  The virtual machine must be shut down
       before you use this command.

DESCRIPTION

       "virt-tar-in" unpacks an uncompressed tarball into a virtual machine disk image or named libvirt domain.

       The first parameter is the tar file.  Use "-" to read the tar file from standard input.	The second parameter is the absolute target
       directory to unpack into.

EXAMPLES

       Upload a home directory to a guest:

	virt-tar-in -d MyGuest homes.tar /home

JUST A SHELL SCRIPT WRAPPER AROUND GUESTFISH

       This command is just a simple shell script wrapper around the guestfish(1) "tar-in" 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-make-fs(1), virt-tar-out(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-in(1)