virt-log(1) | Virtualization Support | virt-log(1) |
virt-log - Display log files from a virtual machine
virt-log [--options] -d domname virt-log [--options] -a disk.img [-a disk.img ...]
"virt-log" is a command line tool to display the log files from the named virtual machine (or disk image).
This tool understands and displays both plain text log files (eg. /var/log/messages) and binary formats such as the systemd journal.
To display other types of files, use virt-cat(1). To follow (tail) text log files, use virt-tail(1). To copy files out of a virtual machine, use virt-copy-out(1). To display the contents of the Windows Registry, use virt-win-reg(1).
Display the complete logs from a guest:
virt-log -d mydomain | less
Find out what DHCP IP address a VM acquired:
virt-log -d mydomain | grep 'dhclient.*bound to'
The format of the disk image is auto-detected. To override this and force a particular format use the --format=.. option.
If you specify guest block devices directly (-a), then libvirt is not used at all.
For example:
virt-log --format=raw -a disk.img
forces raw format (no auto-detection) for disk.img.
virt-log --format=raw -a disk.img --format -a another.img
forces raw format (no auto-detection) for disk.img and reverts to auto-detection for another.img.
If you have untrusted raw-format guest disk images, you should use this option to specify the disk format. This avoids a possible security problem with malicious guests (CVE-2010-3851).
If there are multiple encrypted devices then you may need to supply multiple keys on stdin, one per line.
This program returns 0 if successful, or non-zero if there was an error.
guestfs(3), guestfish(1), virt-cat(1), virt-copy-out(1), virt-tail(1), virt-tar-out(1), virt-win-reg(1), http://libguestfs.org/.
Richard W.M. Jones http://people.redhat.com/~rjones/
Copyright (C) 2010-2020 Red Hat Inc.
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.
To get a list of bugs against libguestfs, use this link: https://bugzilla.redhat.com/buglist.cgi?component=libguestfs&product=Virtualization+Tools
To report a new bug against libguestfs, use this link: https://bugzilla.redhat.com/enter_bug.cgi?component=libguestfs&product=Virtualization+Tools
When reporting a bug, please supply:
2023-05-23 | guestfs-tools-1.48.2 |