Deep dive into Kernel

echo c >/proc/sysrq-trigger

DRBD + Corosync + Pacemaker를 잘 설명한 글 http://everydayminder.wordpress.com/2014/05/21/drbd-pacemaker-corosync-%EA%B8%B0%EB%B0%98-postgresql-ha-%EA%B5%AC%EC%84%B1%ED%99%98%EA%B2%BD-%EC%84%A4%EC%A0%95/ Corosync 관련 글http://ogervasi.unipg.it/OpSysNet/4Students/Clusters/corosync-datasheet-2009.pdfhttps://www.kernel.org/doc/ols/2008/ols2008v1-pages-85-100.pdf

http://www.it-slav.net/blogs/2009/02/05/install-and-configure-snmp-on-ubuntu/

http://hydruid-blog.com/?p=343 Install Zenoss 4.2.4 on Ubuntu 13/14August 10, 2013My clients require 24×7 network monitoring with the need for diverse notifications and a robust event log. Zenoss is a powerful network monitor and when paired with Ubuntu Server, you can rest easy knowing that you have a reliable solution.There is not an official package for Zenoss 4.2.4 on Ubuntu. However, I’ve w..

root@build-vm:/home/sunshout# neutron subnet-create ext-network 192.168.1.0/24 --tenant-id 115a1a2e76c14f2d9b4b0c6e33ea276a --gateway 192.168.1.254 --disable-dhcp --allocation-pool start=192.168.1.50,end=192.168.1.60Created a new subnet:+------------------+--------------------------------------------------+| Field | Value |+------------------+--------------------------------------------------+| ..

password="pass" pass=$(perl -e 'print crypt($ARGV[0], "wtf")' $password) useradd -d HOME_DIR -s /bin/bash -g GROUP -p $pass -f -1 testing

https://launchpad.net/ubuntu/utopic/amd64/python-six/1.6.1-1

To update quota of tenantCommand: nova quota-update --key value To show current quota statusCommand: nova quota-show --tenant Default Quota updateCommand: nova quota-class-update --${key} ${value} default

To update dns nameservere in neutron,Commands:neutron subnet-update ${subnet_name} --dns_nameservers list=true

edit /etc/dhcp/dhclient-exit-hooks.d/hostname #!/bin/sh# dhclient change hostname script for Ubuntu# /etc/dhcp/dhclient-exit-hooks.d/sethostname# logs in /var/log/upstart/network-interface-eth0.log # for debugging:echo "sethostname BEGIN"exportset -x if [ $reason = "BOUND" ]; then echo new_ip_address=$new_ip_address echo new_host_name=$new_host_name echo new_domain_name=$new_domain_name oldhostn..