How to configure serial console access on a XEN based full virtual SLE VM
This document (7003720) is provided subject to the disclaimer at the end of this document.
SUSE Linux Enterprise Server 10 Service Pack 2
This prevents connecting to it using the
xm console <domain-id>command.
- Log in to the VM
- Append the parameter "console=ttyS0" to the
kernel command line in the bootloader configuration (e.g.
/boot/grub/menu.lst), so that it for instance looks like this
kernel /boot/vmlinuz-18.104.22.168-0.39.3.PTF.509066.3-smp root=/dev/disk/by-id/ata-QEMU_HARDDISK_QM00001-part2 resume=/dev/hda1 splash=silent showopts console=ttyS0
- Activate the following line in /etc/inittab by removing the
leading # sign.
S0:12345:respawn:/sbin/agetty -L 9600 ttyS0 vt102
- Allow login to the serial console by adding the following line
to the /etc/securetty file
- Shut down the VM
- Confirm that the configuration file of the the VM in
/etc/xen/vm contains a line like
If not, then add it and refresh the xenstore with the command
# xm new <vm-name>
- Boot the VM and verify that serial console works with
# xm console <domain-id>
Keep in mind that the last line shown on the terminal (e.g. a login prompt) is not shown when connecting (since this is a serial console), so an extra Enter may be required.
In some configurations, the serial console may hang or get out of synchronization. This is a known bug - refer to Serial console synchronization problem and/or hanging (re)boot on full-virtual VMs
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- Document ID:7003720
- Creation Date: 01-Jul-2009
- Modified Date:03-Mar-2020
- SUSE Linux Enterprise Server
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