curtkim

from http://ko.sdndev.net/2
----------------------------
 
 
ip netns add netns1
ip netns exec netns1 ip link list
ip netns exec netns1 ping 127.0.0.1
 
ip netns exec netns1 ip link set dev lo up
ip link add veth0 type veth peer name veth1

curtkim

docker run -t -i ubuntu:14.04 /bin/bash

docker inspect -f '{{.State.Pid}}' a8658e32e8fd 
 
docker pull training/sinatra
docker run -t -i training/sinatra /bin/bash
gem install json
docker commit -m="Added json gem" -a="Kate Smith" 0b2616b0e5a8 ouruser/sinatra:v2
docker history iamteri/sinatra:v2

curtkim

[run groovy script by java command]
java -cp lib/groovy-all-1.8.0.jar groovy.ui.GroovyMain test.groovy
nohup java -Duser.timezone=Asia/Seoul -cp lib/*: groovy.ui.GroovyMain script/findBadGps.groovy >> system.log 2>> error.log &


[String Interpolation]
value = 6
println "The value is $value."
 
 

curtkim

[x]
docker run -ti --rm \
       -e DISPLAY=$DISPLAY \
       -v /tmp/.X11-unix:/tmp/.X11-unix \
       firefox

[watch]
watch -n 1 docker ps

[script]

curtkim

############################################
# [Stream PassThrough TrafficMeter]

util = require 'util'
PassThrough = require('stream').PassThrough
 
 
clientTraffic = {}
 
 

curtkim

TCP Demultiplexing

IP header

'protocol field'

• 1 : ICMP
• 2 : IGMP
• 6 : TCP

curtkim

vboxmanage hostonlyif remove vboxnet0

curtkim

Ctrl+Tab : swtich 'vertex select', 'edge select', 'face select'

curtkim

High level consumer : I just want to use Kafka as extermely fast persistent FIFO buffer and not worry much about details.

Low level consumer : I want to have a custom partition data consuming logic, e.g. start reading data from newly created topics without a need of consumer reconnection to brokers.

curtkim

db.path.aggregate(
   [
      {
        $group : {
           _id : "$hour",
           count: { $sum: 1 }
        }
      }
   ]
)