momota

vagrant

Choose a box (vagrant template) you like.

• A list of base boxes for Vagrant - Vagrantbox.es

 $ vagrant box add {title} {url}
 $ vagrant init {title}
 $ vagrant up

momota

require 'base64'
require 'json'
require 'net/https'

def detect_text_from(image)
  api_key = 'YOUR-API-KEY'
  api_url = "https://vision.googleapis.com/v1/images:annotate?key=#{api_key}"

  enc_image = Base64.strict_encode64(File.new(image, 'rb').read)

momota

import csv
import random

# 1000000 and 52 == roughly 1GB (WARNING TAKES a while, 30s+)
rows = 1000000
columns = 52

def generate_random_row(col):
    a = []
    l = [i]

momota

create a sftp user

We execute as root user on an SFTP server as below. First, we create a specific user is able to utilize SFTP as file transfer. Then, we create a sftp group and put the sftp user under the group.

sftp-server$ sudo -s
sftp-server$ useradd sftp_user

momota

#!/bin/bash -eu

echo -n "enter sudo password: "
stty -echo
read password
stty echo
echo

wiki_dir=/var/www/html/wiki
backup_file="~/backup/`/bin/date +%Y%m%d%H%M%S`_wiki.tar.gz"

momota

#!/bin/bash -eu

# ----------------------------------------------------------------------
# argument validation and initialize
#
if [ $# -eq 2 ]; then
  echo -e "*** if you want to stop this script, exec --- kill -TERM -$$ ---"
  ip_list=$1
  interval=$2
else

momota

#!/bin/bash
echo
echo "------------------------------------------------------------------"
echo "HOSTNAME : `hostname`"
echo "DATE     : `date \"+%Y-%m-%d %H:%M:%S\"`"
echo "USER     : `whoami`"
echo "PWD      : `pwd`"
echo "------------------------------------------------------------------"
echo

momota

#!/bin/bash

# argument validation
if [ $# -eq 2 ];then
  target=$1
  interval=$2
  log="`/bin/date +%Y%m%d%H%M%S`_`/bin/hostname -i`---$1_ping.log"
else
  echo -e "USAGE: ./ping.sh <IP_ADDRESS or HOSTNAME> <PING_INTERVAL[sec]>\n"
  exit 1

momota

# conding: utf-8

def random_string( length )
  str = ('a'..'z').to_a + ('A'..'Z').to_a +
        ('0'..'9').to_a + ['-', '+', '_', '@', '=', '&', '$', '#', '?']

  Array.new( length ){ str[rand( str.size )] }.join
end

# -------------------------------------------------------------------