six demon bag

Wind, fire, all that kind of thing!

2017-08-07

Generate a Solr Password Hash

Recent versions of Solr allow restricting access via authentication and authorization plugins, for instance the basic authentication plugin. The documentation shows an example security.json that you can upload into Zookeeper (assuming that you're running SolrCloud).

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Posted 22:15 [permalink]

2017-08-04

Useful settings for grub on Debian

Boot a kernel just once

If you want to test a new kernel without having access to the console you need to make sure that the system comes back up with the old kernel if the new one panics. Add a setting panic=2 to the kernel commandline in /etc/default/grub to have the system automatically reboot in case of a kernel panic, and tell grub to boot a saved kernel by default:

GRUB_DEFAULT="saved"
GRUB_CMDLINE_LINUX="panic=2"

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Posted 01:45 [permalink]

IPMI interface network configuration from Linux

Load the relevant modules, either via modprobe or by entering them into /etc/modules (so they're loaded automatically on the next system startup).

modprobe ipmi_devintf
modprobe ipmi_si

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Posted 00:36 [permalink]