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Full Stack Web Developer | Graduate student of MS in Computer Science at The University of Texas at Rio Grande Valley

The NSUnknownKeyException is most likely caused by a broken outlet in your view controller. You can identify the screen throwing this error using the log. The [project_name].[view_controller_name] gives the view controller and the outlet name is given which is ‘tipControl’ in the above example. To fix this error follow the following steps:

STEP 1: Go to the storyboard containing the broken outlet here it is main.storyboard

STEP 2: Open the “Connections Inspector” tab on the right

Setting up the share on Linux

Install Samba:

$ sudo apt-get update
$ sudo apt-get install samba

For creating a secured share, make a system account for authentication to access samba shares, here I named the user “shareuser” in an obvious way you can, of course, pick any name:

$ sudo useradd shareuser
$ sudo passwd shareuser

Start by creating a “sharing only” user account on the Mac OS. This allows for a secure way to share files over the network by allowing access to certain folders of your choice without having to share your admin credentials.

Create a sharing-only user account on Mac

  1. Go to System Preferences, then click Users & Groups.

2. Click the lock icon at the bottom of the pane, enter an administrator name and password, then click Unlock.

3. Click the Add button at the bottom of the list on the left.

4. Click the New Account pop-up menu, then choose Sharing Only.

5. Enter a name and password…

Supported Hardware’s

  1. Local Printers:
  2. HP Printer (HPLIP) — — All HP series
  3. Canon MP270 series (Canon MP270 series) — All Canon series
  4. HP Fax (HPLIP)

Network Printers:

  1. Internet Printing Protocol (http)
  2. Internet Printing Protocol (ipps)
  3. Internet Printing Protocol (ipp)
  4. AppSocket/HP JetDirect
  5. Internet Printing Protocol (https)
  6. LPD/LPR Host or Printer
  7. Windows Printer via SAMBA

Install required packages

Install cups, cups-client

apt-get install cups cups-client "foomatic-db"

Add user to lpadmin group

We add the “root” user (or name of your root user) to the lpadmin group which has printing rights.

/usr/sbin/adduser root lpadmin


Adding user `root' to group `lpadmin' ...
Adding user root to group lpadmin

To check if root…

1.0 Introduction

A search engine in today’s world is the primary means by which an average user discovers information about almost anything. People all over the world cognitively depend on search engine results to form opinions, fill the information gap, check facts, survey a market, and for numerous other purposes in everyday life. Search algorithms utilized in search engines influence how users gain information and develop a bias on societal issues and political opinions, thus effecting a user’s attitude and shaping their opinion. In this paper an attempt to summarize the social, economic, and cultural impacts of present web search techniques in…

What is Django?

Django (/ˈdʒæŋɡoʊ/ jang-goh) is a free and open source web application framework, written in Python. A web framework is a set of components that helps you to develop websites faster and easier.

When you’re building a website, you always need a similar set of components: a way to handle user authentication (signing up, signing in, signing out), a management panel for your website, forms, a way to upload files, etc.

Luckily for you, other people long ago noticed that web developers face similar problems when building a new site, so they teamed up and created frameworks (Django being one of…

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