Deep dive into Kernel

1. Source download root@gaus01-m:~# git clone git://libvirt.org/libvirt.git Cloning into 'libvirt'... remote: Counting objects: 146441, done. remote: Compressing objects: 100% (22449/22449), done. remote: Total 146441 (delta 123724), reused 146078 (delta 123482) Receiving objects: 100% (146441/146441), 146.43 MiB | 7.53 MiB/s, done. Resolving deltas: 100% (123724/123724), done. Checking connecti..

Kernel Log Errors were found while checking the disk drive for /. linux sudo vi /etc/grub.d/10_lupin change the line:linux ${rel_dirname}/${basename} root=${LINUX_HOST_DEVICE} loop=${loop_file_relative} ro ${args} to:linux ${rel_dirname}/${basename} root=${LINUX_HOST_DEVICE} loop=${loop_file_relative} rw ${args} Re-generate GRUB2 boot entry:linux sudo update-grub

Inside of the /var/lib/tftpboot directory, open pxelinux.cfg/default using your favorite editor. Add these two lines to the top of the file:console 0 serial 0 19200 0Open ubuntu-installer/i386/boot-screens/text.cfg in your editor. We are going to remove and add a few things to the “append” line under the “install label”. We are going to remove the word quiet, and replace it with console=ttyS0,19..

OVS 에서 VLAN 설정하는 방법 ovs-vsctl set Port br-int tag=50

Hostname 찾기 root@build-vm:/var/www/views# snmpwalk -c public -v 2c 192.168.1.8 .1.3.6.1.2.1.1.5.0iso.3.6.1.2.1.1.5.0 = STRING: "test-vm"

Javascript에서 get parameter를 분리하는 방법 var queryDict = {}location.search.substr(1).split("&").forEach(function(item) {queryDict[item.split("=")[0]] = item.split("=")[1]}) Javascript에서 string 관련 변환http://www.w3schools.com/js/js_strings.asp Javascript Http Get requestfunction httpGet(theUrl) { var xmlHttp = null; xmlHttp = new XMLHttpRequest(); xmlHttp.open( "GET", theUrl, false ); xmlHttp.send( null..

Troubleshooting: Query 를 같은 호스트에 보낼 때 refresh가 되지 않는 버그 존재 해결책 :https://code.google.com/p/google-visualization-api-issues/issues/detail?id=106 query = new google.visualization.Query(dataSourceUrl, {sendMethod:'scriptInjection'});

import netsnmp CPU_TYPE = '.1.3.6.1.2.1.25.3.1.3'CORE_USAGE = '.1.3.6.1.2.1.25.3.3.1.2.' # +IDCORE_NAME = '.1.3.6.1.2.1.25.3.2.1.3.' # +IDdef get_cpu_usage(host,version=2,community='public'): s = netsnmp.Session(DestHost=host, Version=version, Community=community) vars = netsnmp.VarList(netsnmp.Varbind('.1.3.6.1.2.1.25.3.2.1.1')) #count resouces resources = s.walk(vars) cpu_res = {} for res in r..

외부에 데이터를 요청해서 생성하는 그래프 예제http://www.jansipke.nl/using-google-visualization-api-with-own-data-source/ http://jsfiddle.net/7fmKx/