Author Archives: daveti

About daveti

Interested in kernel hacking, compilers, machine learning and guitars.

Free dynamic DNS – he.net and ddclient

Posted on February 17, 2013 by daveti

Recently set up ddns (dynamic DNS) for my Linux workstation successfully. The general intention for ddns is to allow remote access to the workstation where there is no static IP but dynamic IP from DHCP. A lot of ISPs provide … Continue reading →

Posted in Network | Tagged ddclient, ddns, dig, he.net, host, hostname, nslookup, whois | Leave a comment

Make my own Linux workstation – Dell Precision T5600 + Fedora 18 + Mate

Posted on February 4, 2013 by daveti

An introduction to my recently constructed Linux workstation: WORKSTATION: Dell Precision T5600 MONITOR: Dell UltraSharp 2412M POWER: 825W CPU: Intel Xeon E5-2609 4-core 2.40GHz (http://ark.intel.com/products/64588/Intel-Xeon-Processor-E5-2609-10M-Cache-2_40-GHz-6_40-GTs-Intel-QPI) MEM: 8G ECC 1333MHz GPU: 512M Nvidia NVS300 HD: 500G WD 7.2K XL500S RAID: H310 … Continue reading →

Posted in Linux Distro | Tagged dell, fedora, gnome, mate, precision, t5600 | Leave a comment

Pointer in Python

Posted on January 29, 2013 by daveti

There is no pointers in Python but there are pointers in Python indeed. Among different kinds of pointer implementation in Python, this post demonstrate an elegant way to use pointers, especially object pointers when doing Python OOP. Detailed ‘ctypes’ module … Continue reading →

Posted in Programming | Tagged ctypes, pointer, Python | Leave a comment

New Fender, new song, old feelings

Posted on January 8, 2013 by daveti

After leaving my 3 guitars at home, I have started constructing my new guitar family in US and fortunately got 2 – a new Fender strat standard and a used LTD kh-203. Fender has become my favorite not for a … Continue reading →

Posted in Music Prose | Tagged fender | Leave a comment

Jython – Combination of Java and Python

Posted on November 28, 2012 by daveti

This post is used for final project of CIS610 – Teaching Effectiveness in CIS dept at UO, dedicated to the students with background of CIS122 – Intro to Algorithms and Problem Solving Using Python. Background of Java is not mandatory … Continue reading →

Posted in Programming | Tagged Java, JVM, Jython, Python, UO | 1 Comment

tmt – Tomcat monitor tool

Posted on November 10, 2012 by daveti

Our Tomcat server sometimes crushes either process killed or no response from httpd. Before falling into the ‘long-term’ debugging, we have implemented ‘tmt’, which is used to moniter the status of Tomcat process and httpd by restarting the Tomcat timely. … Continue reading →

Posted in Dave's Tools, Programming | Tagged bash, coredump, cronjob, curl, httpd, ps, tmt, Tomcat, ulimit, wget | 1 Comment

jop – Jena Owl Parser

Posted on October 29, 2012 by daveti

Jena API may be the first choice for building Semantic Web applications using Java – parsing RDF and OWL. However, the official Jena document for ontology API (http://jena.apache.org/documentation/ontology/) seems kind of unfriendly with mixing parser and writer part altogether. ‘jop’ … Continue reading →

Posted in AI/ML, Dave's Tools | Tagged jena, jop, Ontology, OWL | Leave a comment

NLTK – install nltk for Python2.7 on 64-bit win 7

Posted on October 8, 2012 by daveti

There are some tricky stuffs if you are planning to install nltk for your Python2.7 (Note, only Python 2.x is supported right now) on 64-bit win7 system. Generally, all these awkward trouble are caused by stupid windows installer, which may … Continue reading →

Posted in AI/ML, IDE_Make | Tagged amd64, nltk, numpy, pylib, Python, win7 | Leave a comment

Python learning – Sieve of Eratosthenes

Posted on September 28, 2012 by daveti

Get all the information about ‘Sieve of Eratosthenes’ on wikipedia (http://en.wikipedia.org/wiki/Sieve_of_Eratosthenes). This algorithm does tell us there should be some algorithms with better time complexcity or space complexcity. Fun! (pic took from Wikipedia) [daveti@aimlab python]$ cat sea.py #!/bin/env python # … Continue reading →

Posted in Programming | Tagged CIS122, Python, UO | Leave a comment

Python learning – Caesar Cipher