tokhi

#Unix Toolbox

This document is a collection of Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users. This is a practical guide with concise explanations, however the reader is supposed to know what s/he is doing.

##Unix Toolbox revision 14.4

The latest version of this document can be found at http://cb.vu/unixtoolbox.xhtml. Replace .xhtml on the link with .pdf for the PDF version and with .book.pdf for the booklet version. On a duplex printer the booklet will create a small book ready to bind. This XHTML page can be converted into a nice PDF document with a CSS3 compliant application (see the script example). See also the about page.
Error reports and comments are m

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#!/usr/bin/env ruby
# make sure you the watir gem installed -> gem install watir
require 'watir'
def log (message) puts "  #{message}" end
def success (message) puts "+ #{message}" end
def fail (message) puts "- #{message}" end
def notify (message)
  success message.upcase
  system 'osascript -e \'Display notification Burgerbot with title "%s"\'' % message
rescue StandardError => e

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Go Tutorial

Function Types

Function type is useful:

• In the case of higher-order functions as we have seen in the above example. The argument and return type is specified using function type
• In the case of defining interfaces in go as in the interface, only the function type is specified. Whatever implements this interface has to define a function of the same type

Notice that the interface shape only defines the type of function

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def break_even(long_sp, short_sp, ndp)
  if long_sp > short_sp # bear option
    long_sp - ndp
  else # bull option
   long_sp + ndp
  end
end

def max_profit(long_sp, short_sp, ndp)
  if(long_sp > short_sp) # bear option

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# adding a column to an existing table
rails g migration AddNameToUsers name:string
  # or
rails generate migration add_image_to_pictures image_id:string

# to remove
rails d migration AddNameToUsers name:string

# remove column from model
rails g migration RemoveProjectIDFromProjects project_id:string

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آسمان رنگ تو آبی آبی

آسمان دریای پر ز آبی

چه بگویم ز ستاره گانت

که خودت کشور آفتابی

آسمان عاشق مهتابی تو و

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[
  {
    "lead": {
      "id": 299888,
      "trade_id": 6,
      "details": {
        "project_deadline": "So schnell wie möglich"
      },
      "closed_at": null,
      "expiration_date": "2018-12-13T01:22:19.000+01:00",

tokhi

Some useful postgresql commands

#  start postgresql
/usr/lib/postgresql-9.0/bin/postgres -D /var/lib/postgresql/9.1/boom/ -c config_file=/etc/postgresql-9.0/postgresql.conf

#
# #psql dump:
pg_dump #host localhost #port 5555 #username "foo" #format tar #blobs #verbose #file "/home/tokhi/Documents/Castaclip/castaclip.master.130612.tmp" "verticals"
# # restore:

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Default

Powerlevel9k

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Elastic Search

Elasticsearch is a real time search engine where a change to an index will be propegated to the whole cluster within a second.

An elasticsearch cluster indicated as one or more nodes, collection of nodes containing all the data, default cluster name is elasticserach.

A node is a single server and part of a cluster, node participate in searching and indexing.

Index is collection of documents equavalent to a database within a relational system, index name must be lowercase Type is represetn a class = table