6 More Discussions You Might Find Interesting
1. UNIX and Linux Applications
I was reading these 2 links about vlc log files.
Where is the VLC Log file? - Ubuntu Forums
logging - how to get vlc logs? - Stack Overflow
Is there a reason why this doesn't work?
VLC -> Tools -> Preferences -> Select "ALL" -> Advanced -> Logging
I created the log file location and... (0 Replies)
Discussion started by: cokedude
0 Replies
2. Shell Programming and Scripting
Heya everyone I'm having trouble trying to work this out use to work but now it come up with a error. If anyone could help please :)
#!/bin/bash
Movies='/home/yoda/Videos'
cd $Movies
cvlc ls | sed -n "$((RANDOM%$(ls | wc -l)+1))p"
Error
yoda@ubuntu:~$ ./Movieback
02... (1 Reply)
Discussion started by: jtsmith90
1 Replies
3. Ubuntu
I'm I able to make vlc or mplayer transparent.
If so how can i do it please.
thanks in advance josh (0 Replies)
Discussion started by: jtsmith90
0 Replies
4. Shell Programming and Scripting
Hi,
New member here looking for help. This might not be a post for the 'VERY basics' section, so feel free to move it to somewhere more appropriate.
I've created a script that searches my computer for video files, creates a list of these files, and selects a number of random entries to play in... (2 Replies)
Discussion started by: uncertain
2 Replies
5. Linux
Hai,
can you please give me the link to download "vlc player" for red hat 9. I found it for Fedora but there is some problem in installation.
Can you please give me the link for red hat. I shalll then download it from there !!! (3 Replies)
Discussion started by: nsharath
3 Replies
6. UNIX for Dummies Questions & Answers
can some one please help me here i seem to be having trouble changing Vlc's skin to WMP11
i have VLC media player 0.7.2
i downloaded the WMP11 skin from a download site
i looked for vlc skin instructions and they said i should use vlc -i and put WMP11 in roots home directly
well there are... (1 Reply)
Discussion started by: Meomix
1 Replies
LEARN ABOUT DEBIAN
guestfs-recipes
guestfs-recipes(1) Virtualization Support guestfs-recipes(1)
NAME
guestfs-recipes - libguestfs, guestfish and virt tools recipes
DESCRIPTION
This page contains recipes for and links to things you can do using libguestfs, guestfish(1) and the virt tools.
Audit a virtual machine for setuid files
The link below contains a small program which can be used to audit a Linux virtual machine to see what setuid and setgid files it contains.
https://rwmj.wordpress.com/2010/12/15/tip-audit-virtual-machine-for-setuid-files/#content
Change the background image in a Windows XP VM
The links below explain how to use guestfish(1) to change the background image for a user of a Windows XP VM. Unfortunately the technique
appears to be substantially different for each version of Windows.
https://lists.fedoraproject.org/pipermail/virt/2011-May/002655.html https://lists.fedoraproject.org/pipermail/virt/2011-May/002658.html
Cloning a virtual machine (Linux)
The guestfish technique described in the link below works well for most Linux VMs. Depending on the Linux distro you may need to change
the paths slightly.
https://rwmj.wordpress.com/2010/09/24/tip-my-procedure-for-cloning-a-fedora-vm/#content
Avoid virt-clone(1). Currently what to do about virt-clone is under discussion.
https://www.redhat.com/archives/virt-tools-list/2011-May/msg00019.html
Cloning a virtual machine (Windows)
It is possible to do a "sysprep" using libguestfs alone, although not straightforward. Currently there is code in the Aeolus Oz project
which does this (using libguestfs). As part of our review of the virt-clone tool, we may add sysprepping ability.
https://github.com/clalancette/oz https://www.redhat.com/archives/virt-tools-list/2011-May/msg00019.html
Convert a CD-ROM / DVD / ISO to a tarball
This converts input "cd.iso" to output "cd.tar.gz":
guestfish --ro -a cd.iso -m /dev/sda tgz-out / cd.tar.gz
To export just a subdirectory, eg. "/files", do:
guestfish --ro -a cd.iso -m /dev/sda tgz-out /files cd.tar.gz
Create empty disk images
You can use the guestfish(1) -N option to create empty disk images. The useful guide below explains the options available.
https://rwmj.wordpress.com/2010/09/08/new-guestfish-n-options-in-1-5-9/#content
Dump raw filesystem content from inside a disk image or VM
You can use the guestfish(1) "download" command to extract the raw filesystem content from any filesystem in a disk image or a VM (even one
which is encrypted or buried inside an LV):
guestfish --ro -a disk.img run : download /dev/sda1 sda1.img
guestfish --ro -d Guest run : download /dev/vg_guest/lv_root lv.img
To list the filesystems in a disk image, use virt-filesystems(1).
Edit grub configuration in a VM
You can use this to:
o Fix a virtual machine that does not boot.
o Change which kernel is used to boot the VM.
o Change kernel command line options.
Use virt-edit(1) to edit the grub configuration:
virt-edit -d BrokenGuest /boot/grub/grub.conf
or for general tinkering inside an unbootable VM use virt-rescue(1) like this:
virt-rescue -d BrokenGuest
Export any directory from a VM
To export "/home" from a VM into a local directory use virt-copy-out(1):
virt-copy-out -d Guest /home .
Notes:
o The final dot of the command is not a printing error. It means we want to copy out to the current directory.
o This creates a directory called "home" under the current directory.
If the guest is a Windows guest then you can use drive letters and backslashes, but you must prefix the path with "win:" and quote it to
protect it from the shell, like this:
virt-copy-out -d WinGuest 'win:c:windowssystem32config' .
To get the output as a compressed tarball, do:
virt-tar-out -d Guest /home - | gzip --best > home.tar.gz
Although it sounds tempting, this is usually not a reliable way to get a backup from a running guest. See the entry in the FAQ:
http://libguestfs.org/FAQ.html#backup
Find out which user is using the most space
This simple script examines a Linux guest to find out which user is using the most space in their home directory:
#!/bin/sh -
set -e
vm="$1"
dir=/home
eval $(guestfish --ro -d "$vm" -i --listen)
for d in $(guestfish --remote ls "$dir"); do
echo -n "$dir/$d"
echo -ne ' '
guestfish --remote du "$dir/$d";
done | sort -nr -k 2
guestfish --remote exit
Get DHCP address from a VM
The link below explains the many different possible techniques for getting the last assigned DHCP address of a virtual machine.
https://rwmj.wordpress.com/2011/03/31/tip-code-for-getting-dhcp-address-from-a-virtual-machine-disk-image/#content
In the libguestfs source examples directory you will find the latest version of the "virt-dhcp-address.c" program.
Get the operating system product name string
Save the following script into a file called "product-name.sh":
#!/bin/sh -
set -e
eval "$(guestfish --ro -d "$1" --i --listen)"
root="$(guestfish --remote inspect-get-roots)"
guestfish --remote inspect-get-product-name "$root"
guestfish --remote exit
Make the script executable and run it on a named guest:
# product-name.sh RHEL60x64
Red Hat Enterprise Linux Server release 6.0 (Santiago)
You can also use an XPath query on the virt-inspector(1) XML using the "xpath" command line tool or from your favourite programming
language:
# virt-inspector RHEL60x64 > xml
# xpath '//product_name' < xml
Found 1 nodes:
-- NODE --
<product_name>Red Hat Enterprise Linux Server release 6.0 (Santiago)</product_name>
Get the default boot kernel for a Linux VM
The link below contains a program to print the default boot kernel for a Linux VM.
https://rwmj.wordpress.com/2010/10/30/tip-use-augeas-to-get-the-default-boot-kernel-for-a-vm/#content
It uses Augeas, and the technique is generally applicable for many different tasks, such as:
o listing the user accounts in the guest
o what repositories is it configured to use
o what NTP servers does it connect to
o what were the boot messages last time it booted
o listing who was logged in recently
http://augeas.net/
Install RPMs in a guest
The link below contains a method to install RPMs in a guest. In fact the RPMs are just uploaded to the guest along with a "firstboot"
script that installs them next time the guest is booted. You could use this technique to install vital security updates in an offline
guest.
https://rwmj.wordpress.com/2010/12/01/tip-install-rpms-in-a-guest/#content
List applications installed in a VM
Save the following to a file "list-apps.sh":
#!/bin/sh -
set -e
eval "$(guestfish --ro -d "$1" --i --listen)"
root="$(guestfish --remote inspect-get-roots)"
guestfish --remote inspect-list-applications "$root"
guestfish --remote exit
Make the file executable and then you can run it on any named virtual machine:
# list-apps.sh WinGuest
[0] = {
app_name: Mozilla Firefox (3.6.12)
app_display_name: Mozilla Firefox (3.6.12)
app_epoch: 0
app_version: 3.6.12 (en-GB)
app_release:
app_install_path: C:Program FilesMozilla Firefox
app_trans_path:
app_publisher: Mozilla
app_url: http://www.mozilla.com/en-GB/
app_source_package:
app_summary:
app_description: Mozilla Firefox
}
[1] = {
app_name: VLC media player
app_display_name: VLC media player 1.1.5
app_epoch: 0
app_version: 1.1.5
app_release:
app_install_path: C:Program FilesVideoLANVLC
app_trans_path:
app_publisher: VideoLAN
app_url: http://www.videolan.org/
app_source_package:
app_summary:
app_description:
}
If you want to run the script on disk images (instead of libvirt virtual machines), change "-d "$1"" to "-a "$1"". See also
virt-inspector(1).
List files and directories in a VM
This involves using the guestfish(1) "find0" command like this:
guestfish --ro -d Guest -i find0 / - | tr ' ' '
' | sort
List services in a Windows VM
The link below contains a script that can be used to list out the services from a Windows VM, and whether those services run at boot time
or are loaded on demand.
https://rwmj.wordpress.com/2010/12/10/tip-list-services-in-a-windows-guest/#content
Make a disk image sparse
The link below contains some guides for making a disk image sparse (or reintroducing sparseness).
https://rwmj.wordpress.com/2010/10/19/tip-making-a-disk-image-sparse/#content
Monitor disk usage over time
You can use virt-df(1) to monitor disk usage of your guests over time. The link below contains a guide.
http://virt-tools.org/learning/advanced-virt-df/
Reading the Windows Event Log from Windows Vista (or later)
guestfish(1) plus the tools described in the link below can be used to read out the Windows Event Log from any virtual machine running
Windows Vista or a later version.
https://rwmj.wordpress.com/2011/04/17/decoding-the-windows-event-log-using-guestfish/#content
Remove root password (Linux)
Using the virt-edit(1) -e option you can do simple replacements on files. One use is to remove the root password from a Linux guest:
virt-edit domname /etc/passwd -e 's/^root:.*?:/root::/'
Remove Administrator password (Windows)
The link below contains one technique for removing the Administrator password from a Windows VM, or to be more precise, it gives you a
command prompt the next time you log in which you can use to bypass any security:
https://mdbooth.wordpress.com/2010/10/18/resetting-a-windows-guests-administrator-password-with-guestfish/
Unpack a live CD
Linux live CDs often contain multiple layers of disk images wrapped like a Russian doll. You can use guestfish(1) to look inside these
multiple layers, as outlined in the guide below.
https://rwmj.wordpress.com/2009/07/15/unpack-the-russian-doll-of-a-f11-live-cd/#content
Uploading and downloading files
The link below contains general tips on uploading (copying in) and downloading (copying out) files from VMs.
https://rwmj.wordpress.com/2010/12/02/tip-uploading-and-downloading/#content
Use libguestfs tools on VMware ESX guests
The link below explains how to use libguestfs, guestfish(1) and the virt tools on any VMware ESX guests, by first sharing the VMware VMFS
over sshfs.
https://rwmj.wordpress.com/2011/05/10/tip-use-libguestfs-on-vmware-esx-guests/#content
SEE ALSO
guestfs(3), guestfish(1), guestfs-examples(3), guestfs-erlang(3), guestfs-java(3), guestfs-ocaml(3), guestfs-perl(3), guestfs-python(3),
guestfs-ruby(3), <http://libguestfs.org/>.
AUTHORS
Richard W.M. Jones ("rjones at redhat dot com")
COPYRIGHT
Copyright (C) 2009-2012 Red Hat Inc. <http://libguestfs.org/>
The examples in this manual page may be freely copied, modified and distributed without any restrictions.
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This library 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; 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 guestfs-recipes(1)
