NAME

       virt-log - Display log files from a virtual machine

SYNOPSIS

        virt-log [--options] -d domname

        virt-log [--options] -a disk.img [-a disk.img ...]

DESCRIPTION

       "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 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).

EXAMPLES

       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'

OPTIONS

       --help
           Display brief help.

       -a file
       --add file
           Add  file  which  should be a disk image from a virtual machine.  If the virtual machine has multiple
           block devices, you must supply all of them with separate -a options.

           The format of the disk image is auto-detected.  To override this and force a  particular  format  use
           the --format=.. option.

       -a URI
       --add URI
           Add a remote disk.  See "ADDING REMOTE STORAGE" in guestfish(1).

       -c URI
       --connect URI
           If  using  libvirt,  connect  to  the  given URI.  If omitted, then we connect to the default libvirt
           hypervisor.

           If you specify guest block devices directly (-a), then libvirt is not used at all.

       -d guest
       --domain guest
           Add all the disks from the named libvirt guest.  Domain UUIDs can be used instead of names.

       --echo-keys
           When prompting for keys and passphrases, virt-log normally turns echoing off so you cannot  see  what
           you  are  typing.   If you are not worried about Tempest attacks and there is no one else in the room
           you can specify this flag to see what you are typing.

       --format=raw|qcow2|..
       --format
           The default for the -a option is to auto-detect the format of the disk image.  Using this forces  the
           disk  format  for  -a  options  which  follow  on  the command line.  Using --format with no argument
           switches back to auto-detection for subsequent -a options.

           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).

       --keys-from-stdin
           Read  key  or  passphrase  parameters from stdin.  The default is to try to read passphrases from the
           user by opening /dev/tty.

       -v
       --verbose
           Enable verbose messages for debugging.

       -V
       --version
           Display version number and exit.

       -x  Enable tracing of libguestfs API calls.

EXIT STATUS

       This program returns 0 if successful, or non-zero if there was an error.

SEE ALSO

       guestfs(3),    guestfish(1),    virt-cat(1),    virt-copy-out(1),    virt-tar-out(1),    virt-win-reg(1),
       http://libguestfs.org/.

AUTHOR

       Richard W.M. Jones http://people.redhat.com/~rjones/

COPYRIGHT

       Copyright (C) 2010-2016 Red Hat Inc.

LICENSE

       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.

BUGS

       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:

       •   The version of libguestfs.

       •   Where you got libguestfs (eg. which Linux distro, compiled from source, etc)

       •   Describe the bug accurately and give a way to reproduce it.

       •   Run libguestfs-test-tool(1) and paste the complete, unedited output into the bug report.

libguestfs-1.32.2                                  2016-01-29                                        virt-log(1)