UML_MCONSOLE(1) General Commands Manual UML_MCONSOLE(1)
NAME
uml_mconsole -- attach to the management console of a user-mode Linux
kernel
SYNOPSIS
uml_mconsole [socket] [command ...]
DESCRIPTION
This manual page documents briefly the uml_mconsole command.
This manual page was written for the Debian GNU/Linux distribution be-
cause the original program does not have a manual page.
uml_mconsole is a program to connect to the management console of a
user-mode Linux kernel. The UML management console is a low-level in-
terface to the kernel, somewhat like the i386 SysRq interface. Since
there is a full-blown operating system under UML, there is much greater
flexibility possible than with the SysRq mechanism.
OPTIONS
socket The pathname of the socket to which to connect. This is
printed when UML boots, for example:
mconsole initialized on /tmp/umlNJ32yL/mconsole
In this example, you would start uml_mconsole like this:
uml_mconsole umlNJ32yL
command Any of the commands listed in the "COMMANDS" section.
COMMANDS
version Prints the UML version number.
halt Shuts down the UML system immediately, without syncing disks
or cleanly shutting down swap space.
reboot Reboots the UML system immediately, without syncing disks or
cleanly shutting down swap space.
log string
Cause UML to log string to the kernel log.
cad Invokes the Control-Alt-Delete handler.
sysrq letter
Performs the SysRq action controlled by letter.
stop Pauses UML. UML will do nothing until the 'go' command is
issued.
go Resumes execution after a 'stop' command.
config device
Adds a new device to the virtual machine, or queries the con-
figuration of an existing device. It takes one argument,
which is either the device to add, with the same syntax as
the kernel command line, or the name of an existing device.
For example:
(mconsole)
config ubd3=root_fs_debian22
OK
(mconsole)
config ubd3
OK root_fs_debian22
remove Deletes a device from the virtual machine. Its argument is
the name of the device to be removed. In the case of the ubd
driver, the removed block device must not be mounted, swapped
on, or otherwise open, and in the case of the network driver,
the device must be down.
(mconsole)
remove ubd3
OK
SEE ALSO
linux(1)
The UserModeLinux-HOWTO (link to URL http://user-mode-linux.source-
forge.net/UserModeLinux-HOWTO.html)
AUTHOR
uml_mconsole was written by Jeff Dike and others.
This manual page was written by Matt Zimmerman mdz@debian.org for the
Debian GNU/Linux system, based on material in the UserModeLinux-HOWTO
by Rusty Russell, and the uml_mconsole source code.
UML_MCONSOLE(1)