This morning I passed by my secondary school campus. It has changed a lot with 2 brand new buildings. I started to learn programing in that school, where they taught me about palindrome and some very basic programming lessons. I don’t even remember what language was used back then. Probably basic. Then I remember learning about OO…
LXC has quickly become my favorate test bed. Starting a CentOS 7 container is however slightly complicated.
CoreOS seems to be gaining momentum. It happens to be available on Azure so I spun up an instance and tried. Once it’s up, ssh to it and then launch a ubuntu docker instance [bash light=”true”]xpk-core01 ~ # docker run -t -i ubuntu /bin/bash root@cf1c4da1b078:/# root@cf1c4da1b078:/# lsb_release -a No LSB modules are available. Distributor ID:…
On recent version of Fefora, CentOS, and RHEL, it is possible to use teamd to setup link aggregation. Teamd is more configurable and it allows load balancing on LACP. Here we will walk through the simple configurations using old-fashion config files. To setup load balancing without switch support (or when both connection go to the same…
Sure you can do the math yourself but why not trust a tool. coreutils include a tool called numfmt which can convert a number to human readable format. Much like when you run df -h. On mac homebrew, the tool is called gnumfmt. Give it a try: [code] $ gnumfmt –to=iec-i –suffix=B 4812939778547 4.4TiB $…
Got my hands on a DX90 a couple days ago, what a DAP. Its dual Sabre DAC delivers a lot of details in all ranges. From the high to the mid to the bass, I’m getting supreme quality. I don’t think there are emphasis on any range, they’re equally impressive. But as a little bit…
In this example, I configured 2x cloud instances as cluster nodes, 1x cloud instance as iSCSI target, exporting the quorum disk for the cluster. http://www.headdesk.me/Redhat_Cluster_on_CentOS_6
The program looks short but the way Python handles JSON is not very elegant. JSON is supposed to be a serialized object, so it should be processed as an object. But here, it’s processed as an array. [python] #!/usr/bin/python import json import sys print "Usage: cat JSON | BasicParse.py | column -t" jsonInput = sys.stdin…