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find . -type f -mtime +30 # 30 天之前修改过的文件
find . -type f -mtime -30 # 30 天内的文件

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ls | xargs -l asd echo asdf # ${filename}f 文件名后多了个"f"

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#! /usr/bin/env ruby

# Tool top 10
#   git 100
#   vim 49
#   xxx 21
#
# Action top 10
#   git checkout master 231
#   vim index.html 192

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#! /usr/bin/env ruby

require './boot' rescue nil

conn = ActiveRecord::Base.connection
table_name = 'schema_migrations'

cols = conn.execute("show columns from #{table_name}").map {|row| row.first }

unless cols.include?('version')

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class Settings
  class << self
    Dir[Rails.root.join('config/settings/*')].each do |filepath|
      filename = File.basename filepath
      next unless filename =~ /^\w+\.ya?ml$/
      puts "Load config '#{filename}'"

      setting_name = filename.gsub(/\.ya?ml/, '')
      eval(%Q{
        def #{setting_name}

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db_config = YAML.load_file('config/my_database.yml')
resolver = ActiveRecord::ConnectionAdapters::ConnectionSpecification::Resolver.new(db_config)
spec = resolver.spec(env)
conn_pool = ActiveRecord::ConnectionAdapters::ConnectionPool.new(spec)

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#! /bin/bash

sudo apt-get update
sudo apt-get -y install autoconf automake build-essential libass-dev libfreetype6-dev \
  libgpac-dev libsdl1.2-dev libtheora-dev libtool libva-dev libvdpau-dev \
  libvorbis-dev libx11-dev libxext-dev libxfixes-dev pkg-config texi2html zlib1g-dev
mkdir ~/ffmpeg_sources

which yasm && echo "yasm has installed" || sudo apt-get -y install yasm
which wget && echo "wget has installed" || sudo apt-get -y install wget

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app = Proc.new do |env|
  ['200', {'Content-Type' => 'text/html'}, ['Hello, this is a rack app.']]
end

run app

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require 'rack'

app = Proc.new do |env|
  ['200', {'Content-Type' => 'text/html'}, ['Hello, this is a rack app.']]
end

port = ENV['PORT'] || 8080
Rack::Handler::WEBrick.run app, Port: port

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# Daemon.new.run do
#  `echo "#{Process.pid} #{Time.now}" >> /tmp/daemon_ruby`
# end


require 'timeout'
require 'socket'
require 'logger'
require 'fileutils'