SOL: Serial Over Line is a wonderful feature that redirects your server’s console thanks to the goodness of IPMI.
# ttyS1 - getty
# This service maintains a getty on ttyS1 from the point the system is
# started until it is shut down again.
start on stopped rc or RUNLEVEL=
stop on runlevel [!2345]
exec /sbin/getty -L 115200 ttyS1 vt102
Then start it manually:
$ sudo start
At the next boot sequence, upstart will automatically start it.
$ sudo update-grub Generating grub.cfg ... Found linux image: /boot/vmlinuz-3.8.0-26-generic Found initrd image: /boot/initrd.img-3.8.0-26-generic Found linux image: /boot/vmlinuz-3.2.0-23-generic Found initrd image: /boot/initrd.img-3.2.0-23-generic done
II. Use it
Through IPMI (install ipmi-tools first):
$ sudo ipmitool -I lanplus -H 10.66.6.119 -U root sol activate Password: [SOL Session operational. Use ~? forhelp]
16 GB Installed
ProLiant System BIOS - J03 (12/14/2012) Copyright 1982, 2012 Hewlett-Packard Development Company, L.P.
1 Processor(s) detected, 4 total cores enabled, Hyperthreading is not supported Proc 1: Intel(R) Xeon(R) CPU E5-2603 0 @ 1.80GHz
HP Power Profile Mode: Balanced Power and Performance Power Regulator Mode: Dynamic Power Savings
Redundant ROM Detected - This system contains a valid backup System ROM.
Inlet Ambient Temperature: 30C/86F Advanced Memory Protection Mode: Advanced ECC Support HP SmartMemory authenticated in all populated DIMM slots. ... ... ... ...
After a couple of minutes, you’ll get your login’s prompt.
How to use it:
[email protected]:~# ~? Supported escape sequences: ~. - terminate connection (and any multiplexed sessions) ~B - send a BREAK to the remote system ~C - open a command line ~R - Request rekey (SSH protocol 2 only) ~^Z - suspend ssh ~# - list forwarded connections ~& - background ssh (when waiting for connections to terminate) ~? - this message ~~ - send the escape character by typing it twice (Note that escapes are only recognized immediately after newline.)
And of course, as soon as you’re done playing with it:
$ sudo ipmitool -I lanplus -H 10.66.6.119 -U root sol deactivate Password: Info: SOL payload already de-activated