ziwon

#! /usr/bin/env python3.5
"""

Fixing bluetooth stereo headphone/headset problem in ubuntu 16.04 and also debian jessie, with bluez5.

Workaround for bug: https://bugs.launchpad.net/ubuntu/+source/indicator-sound/+bug/1577197
Run it with python3.5 or higher after pairing/connecting the bluetooth stereo headphone.

This will be only fixes the bluez5 problem mentioned above .

ziwon

def sha256_encode(secret, password):
    """
    Spring Security 모듈의 StandardPasswordEncoder encode() 함수를 구현

    :param secret:
    :param password:
    :return:
    """
    salt_key_length = 8
    max_hash_rounds = 1024

ziwon

Setup private Ethereum network with Docker

Ethereum is a decentralized platform that runs smart contracts: applications that run exactly as programmed without any possibility of downtime, censorship, fraud or third party interference.

This is a step-by-step guide, how to setup private Ethereum network. 

We’ll set up a network and create two simple JSON-RPC clients in order to communicate with our Ethereum nodes.

ziwon

FILE SPACING:

 # double space a file
 sed G

 # double space a file which already has blank lines in it. Output file
 # should contain no more than one blank line between lines of text.
 sed '/^$/d;G'

ziwon

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

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days_default = {'월':0, '화':1, '수':2, '목':3, '금':4, '토':5, '일':6}

# input: 0, 1, 2, 4, 6
# output: 0~2, 4, 6

reverse= dict((v, k) for k, v in days_default.items())
def collapse_weekdays(days):
    days = list(map(lambda k: days_default.get(k), days))
    
    shift = lambda n, k: (n + 1 < k and days[n + 1] - days[n] == 1) and shift(n + 1, k) or n

ziwon

Kubectl output options

Let's look at some basic kubectl output options.

Our intention is to list nodes (with their AWS InstanceId) and Pods (sorted by node).

We can start with:

kubectl get no

ziwon

# localhost 
sudo tshark -i lo

# or add loopback interface 
sudo ifconfig lo0 alias 127.0.0.0 up
sudo tshark -i lo0

# eth0
sudo tshark -i eth0 -f 'port 80 or 443' -R 'http.host matches ".*?youtube\.com.*"' -S -V -l -T fields -e ip.src -e ip.src_host -e ip.dst -e ip.dst_host -e http.accept -e http.accept_encoding -e http.accept_language -e http.authbasic -e http.authorization -e http.cache_control -e http.connection -e http.content_encoding -e http.content_length -e http.content_length_header -e http.content_type -e http.cookie -e http.date -e http.host -e http.last_modified -e http.location -e http.notification -e http.proxy_authenticate -e http.proxy_authorization -e http.proxy_connect_host -e http.proxy_connect_port -e http.referer -e http.request -e http.request.full_uri -e http.request.method -e http.request.uri -e http.request.version -e http.response -e http.response.code -e http.response.phrase -e http.sec_websocket_accept -e http.sec_websocket_extensions -e http.sec_websocket_key -e http.sec_websock

ziwon

development:
  adapter: mysql2
  encoding: utf8
  database: my_database
  username: root
  password:
  apt:
    - somepackage
    - anotherpackage

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let g:python_host_skip_check = 1
let g:python3_host_skip_check = 1

let g:python_host_prog = '/usr/local/bin/python2'
let g:python3_host_prog = '/usr/local/bin/python3'

let g:EditorConfig_exec_path = '/usr/local/bin/editorconfig'
let g:EditorConfig_core_mode = 'external_command'

" Deoplete