Howto connect to a terminal in an emalated linux-livecd?
Hi list, after hours for searching in google-world, i didnt find any appropriate for this problem: I want to boot a live-cd (i.e. ubuntu 14.04.1-desktop) in qemu, which starts with an graphical interface, done i.e. by qemu-system-x86_64 -m 3G -smp 2 -drive file=ubuntu-14.04.1-desktop-i386.iso,media=cdrom,if=virtio --enable-kvm Now i want to access to the console of the ubuntu-livecd. At the moment i can do this over changing to text mode via sendkey ctrl-alt-f1 in qemu-console (Alt-2), then switching back to qemu-window (alt-1). Now i have access to tty1 of my livecd. But IMHO there should be a more simple way to access to such a console with qemu, i.e. through a pipe, a serial console etc., but i didnt found anything working. The best i got was with -chardev pty,id=myid, which resulted in a "char device redirected to /dev/pts/0 (label myid)". But with a "screen /dev/pts/0" i wasnt able to see any input or output. ssh is unfortunatly not available at this time on the livecd (so i could connect i.e. via -net user,hostfwd:tcp:10022-:22) Any hints to connect directly to a console in an emulated linux? Tfh! Oliver -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Howto connect to a terminal in an emalated linux-livecd?
On Thu, Sep 11, 2014 at 01:48:51PM +0200, Oliver Rath wrote: > after hours for searching in google-world, i didnt find any appropriate > for this problem: > > I want to boot a live-cd (i.e. ubuntu 14.04.1-desktop) in qemu, which > starts with an graphical interface, done i.e. by > > qemu-system-x86_64 -m 3G -smp 2 -drive > file=ubuntu-14.04.1-desktop-i386.iso,media=cdrom,if=virtio --enable-kvm > > Now i want to access to the console of the ubuntu-livecd. At the moment > i can do this over changing to text mode via > > sendkey ctrl-alt-f1 > > in qemu-console (Alt-2), then switching back to qemu-window (alt-1). Now > i have access to tty1 of my livecd. > > But IMHO there should be a more simple way to access to such a console > with qemu, i.e. through a pipe, a serial console etc., but i didnt found > anything working. The best i got was with -chardev pty,id=myid, which > resulted in a "char device redirected to /dev/pts/0 (label myid)". But > with a "screen /dev/pts/0" i wasnt able to see any input or output. > > ssh is unfortunatly not available at this time on the livecd (so i could > connect i.e. via -net user,hostfwd:tcp:10022-:22) > > Any hints to connect directly to a console in an emulated linux? I use the serial console: $ qemu-system-x86_64 -serial stdio ... Make sure the guest has console=ttyS0 on the kernel command-line. Stefan pgpWubrzAj75D.pgp Description: PGP signature
Re: Howto connect to a terminal in an emalated linux-livecd?
On Fri, Sep 12, 2014 at 01:43:18PM +0100, Stefan Hajnoczi wrote: > On Thu, Sep 11, 2014 at 01:48:51PM +0200, Oliver Rath wrote: > > after hours for searching in google-world, i didnt find any appropriate > > for this problem: > > > > I want to boot a live-cd (i.e. ubuntu 14.04.1-desktop) in qemu, which > > starts with an graphical interface, done i.e. by > > > > qemu-system-x86_64 -m 3G -smp 2 -drive > > file=ubuntu-14.04.1-desktop-i386.iso,media=cdrom,if=virtio --enable-kvm > > > > Now i want to access to the console of the ubuntu-livecd. At the moment > > i can do this over changing to text mode via > > > > sendkey ctrl-alt-f1 > > > > in qemu-console (Alt-2), then switching back to qemu-window (alt-1). Now > > i have access to tty1 of my livecd. > > > > But IMHO there should be a more simple way to access to such a console > > with qemu, i.e. through a pipe, a serial console etc., but i didnt found > > anything working. The best i got was with -chardev pty,id=myid, which > > resulted in a "char device redirected to /dev/pts/0 (label myid)". But > > with a "screen /dev/pts/0" i wasnt able to see any input or output. > > > > ssh is unfortunatly not available at this time on the livecd (so i could > > connect i.e. via -net user,hostfwd:tcp:10022-:22) > > > > Any hints to connect directly to a console in an emulated linux? > > I use the serial console: > > $ qemu-system-x86_64 -serial stdio ... > > Make sure the guest has console=ttyS0 on the kernel command-line. Just to add a little more to what Stefan wrote, here's a working CLI (not be the most optimal) I use w/ serial console: $ /usr/bin/qemu-system-x86_64 -m 2048 \ -nographic -nodefconfig -nodefaults \ -machine accel=kvm -m 2048 \ -drive file=./snap1-f20vm.qcow2,if=ide,format=qcow2 \ -serial stdio And, a little more info here[1] [1] http://rwmj.wordpress.com/2011/07/08/setting-up-a-serial-console-in-qemu-and-libvirt/ -- /kashyap -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
