[[!meta copyright="Copyright © 2009, 2012 Free Software Foundation, Inc."]] [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable id="license" text="Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled [[GNU Free Documentation License|/fdl]]."]]"""]] # listing running domUs $ sudo xm list $ sudo xm top # handling running domUs Forcefully killing a domU (that has crashed or is busy-looping, etc.): $ sudo xm destroy [domU] As for (re-)starting a domU, read below in *domU consoles*. Using `xm shutdown [domU]` to gracefully shut down a running domU does not yet work -- this is not yet implemented in the [[Xen port of GNU Mach|microkernel/mach/gnumach/ports/xen]] ([[!taglink open_issue_xen]]). # domU consoles To avoid any complications with people trying to use the same console at the same time, please use this command for attaching to a domU's console (this command line will also start the domU in case that it isn't running already): $ host=[domU] && sudo screen -DRRS console-$host sh -c "xm console $host || xm create -c $host" Otherwise, if one attaches to the same console twice, the second instance will in fact forward input to the domU (possibly infering with what the person is doing on the first instance), but the output won't be sent back to the second instance. After having typed this once, Bash's `reverse-search-history` (`C-r`), followed by typing in `host=flubber`, for example, will be enough to get access to that machine's console. /!\ TODO: How does one get the environment variables `COLUMNS` and `LINES` set properly when using `xm console`? According to Samuel, *you don't, the xen console doesn't have the notion of terminal size*. This is relevant for everything using `(n)curses` -- for interactive console applications. Using `export COLUMNS=143 LINES=44` does work, but is a manual process.