iamjerryyeung

find out disk space usage

2009-05-25T22:19:00.001-07:00

#!/bin/sh df -H | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output; do   echo $output   usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1  )   partition=$(echo $output | awk '{ print $2 }' )   if [ $usep -ge 90 ]; then     echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)" |      mail -s "Alert: Almost out of disk space $usep%" you@somewhere.com   fi done

MySql show table status

information retrieval search

2009-05-25T20:40:00.000-07:00

http://people.ischool.berkeley.edu/~hearst/irbook/
http://www.stanford.edu/class/cs240/readings/dean.pdf

skip DTD validation

2009-04-20T10:45:00.001-07:00

http://stackoverflow.com/questions/243728/how-to-disable-dtd-at-runtime-in-javas-xpath

DAO

2009-04-08T16:11:00.001-07:00

http://www.ibm.com/developerworks/library/j-dao/

http://java.sun.com/blueprints/patterns/DAO.html

java tip

2009-04-04T20:38:00.001-07:00

http://www.javaspecialists.eu/archive/Issue142.html

http://www.1001javatips.com/

javascript template

2008-10-08T21:48:00.000-07:00

http://code.google.com/p/trimpath/wiki/JavaScriptTemplates

TrimPath

keytool keystore

2008-09-09T16:53:00.000-07:00

(Java 6 allows user to import private key and cert now)

http://cunning.sharp.fm/2008/06/importing_private_keys_into_a.html

(For older library, you may need the keyimport program)

http://www.nealgroothuis.name/import-a-private-key-into-a-java-keystore/

ssl certificate openssl

2008-08-13T23:55:00.000-07:00

http://www.noah.org/wiki/CSR_Apache

openssl conver pem der ber

2008-08-06T21:05:00.001-07:00

http://www.middleware.vt.edu/doku.php?id=middleware:ed:edid:usage%20

hibernate lazy

2008-07-23T14:08:00.000-07:00

http://blog.xebia.com/2008/03/08/advanced-hibernate-proxy-pitfalls/

trapgen

2008-07-12T17:50:00.001-07:00

http://www.ncomtech.com/trapgen.html

mysql vs postgres comparison

2008-07-11T20:47:00.000-07:00

http://www-css.fnal.gov/dsg/external/freeware/pgsql-vs-mysql.html

wireshark ssl

2008-06-28T17:43:00.001-07:00

http://blogs.sun.com/beuchelt/entry/decrypting_ssl_traffic_with_wireshark

mysql

2008-06-27T23:04:00.000-07:00

http://hackmysql.com/mysqlsla_filters

openssl

2008-06-04T10:33:00.000-07:00

http://security.ncsa.uiuc.edu/research/grid-howtos/usefulopenssl.php

ldap

2008-05-17T16:15:00.001-07:00

http://www.sybase.com/content/1026313/SYSD1039LDAP_WP.pdf

memory leak

2008-03-30T22:23:00.001-07:00

http://www.ibm.com/developerworks/java/library/j-jtp11225/index.html

certificate management tool

2008-03-30T16:12:00.000-07:00

TinyCA

garbage collector

2008-03-23T20:03:00.000-07:00

http://chaoticjava.com/posts/parallel-and-concurrent-garbage-collectors/

java nio

2008-03-10T22:08:00.000-07:00

http://www.particle.kth.se/~lindsey/JavaCourse/Book/Part1/Supplements/Chapter09/nio.html

http://access1.sun.com/techarticles/BuffersAPI/BuffersAPIFundamentals.html#buf2

java nio

2008-03-10T21:04:00.001-07:00

http://www.scribd.com/doc/267405/-Java-NIO-with-Grizzly

threadlocal

2008-03-10T15:17:00.000-07:00

http://www.ddj.com/java/184405382

static final private anonymous class for the threadlocal subclass
each thread will have the container ( the get()) which has a reference to the instance of threadlocal. conceptually, there is a map with key the currentthread and the object.

HTML calendar

2008-03-04T13:22:00.001-08:00

Bazillyo's Spiffy DHTML Popup Calendar

webservice nillable null value

2008-02-19T18:59:00.000-08:00

http://www.ibm.com/developerworks/xml/library/ws-tip-null.html

escape urlencode

2008-02-18T13:06:00.001-08:00

http://xkr.us/articles/javascript/encode-compare/