Oppo A57 with 3GB RAM, 16MP Front Camera, Fingerprint Sensor Launched in India

Oppo has launched A57 smartphone in India. It is available in Gold color and is priced at Rs. 14990. The smartphone will be available in all leading offline retail and online stores like Flipkart, Snapdeal, and Amazon India starting February 3.

Oppo A57 features 5.2-inch (1280 x 720 pixels) HD 2.5D curved glass display with Corning Gorilla Glass 4 powered by 1.4GHz Octa-Core Snapdragon 435 processor with Adreno 505 GPU and 3GB RAM. It has an internal storage of 32GB and can be expanded via microSD up to 256GB. It sports 13MP rear camera with LED Flash, PDAF and a 16MP front-facing camera. It runs on Android 6.0.1 Marshmallow with ColorOS 3.0 on top and has 2900 mAh battery.

Oppo A57

Key Features:

• 5.2-inch (1280 x 720 pixels) HD 2.5D curved glass display with Corning Gorilla Glass 4
• 1.4GHz Octa-Core Snapdragon 435 processor with Adreno 505 GPU
• 3GB RAM
• 32GB internal storage, Expandable via microSD up to 256GB
• 13MP rear camera with LED Flash, PDAF
• 16MP front-facing camera
• Android 6.0.1 Marshmallow with ColorOS 3.0 on top
• Dual SIM (nano + nano)
• Fingerprint sensor
• 4G VoLTE, WiFi 802.11 b/g/n, Bluetooth 4.1, GPS
• 2900 mAh battery

Commenting on the launch, Sky Li, Oppo VP and Managing Director of International Mobile Business, said, "When we saw the demand for the great 16-megapixel selfie camera on the F1s, we set out to bring that experience to an even wider range of users. The A57 brings consumers premium photography and advanced features, like the industry-leading fingerprint reader, that goes well beyond the conventional boundaries for this price segment."

Vivo V5 Plus with 4GB RAM, 20MP + 8MP Dual Front Cameras Launched in India at Rs. 27,980

Vivo has launched V5 Plus selfie-focused smartphone in India. It is available in Golden color and is priced at Rs. 27,980. The smartphone will go up for pre-orders from Tuesday - and become available to buy via both online and offline retailers from February 1.

Vivo V5 Plus features 5.5-inch (1920 x 1080 pixels) Full HD In-Cell display with 2.5D Corning Gorilla Glass 5 powered by 2GHz Octa-Core Snapdragon 625 processor with Adreno 506 GPU and 4GB RAM. It has an internal storage of 64GB. It sports a 16MP rear camera with LED Flash, PDAF and a 20MP front-facing camera with Moonlight Flash, Secondary 8MP front camera. It runs on Android 6.0 Marshmallow with Funtouch OS 3.0 on top and has 3160 mAh battery with fast charging.

Vivo V5 Plus

Key Features:

• 5.5-inch (1920 x 1080 pixels) Full HD In-Cell display with 2.5D Corning Gorilla Glass 5
• 2GHz Octa-Core Snapdragon 625 processor with Adreno 506 GPU
• 4GB RAM
• 64GB internal memory
• 16MP rear camera with LED Flash, PDAF
• 20MP front-facing camera with Moonlight Flash, Secondary 8MP front camera
• Android 6.0 Marshmallow with Funtouch OS 3.0 on top
• Dual SIM (nano + nano)
• Fingerprint sensor
• 4G LTE, WiFi 802.11 ac (2.4 GHz + 5 GHz), Bluetooth 4.2, GPS
• 3160 mAh battery with fast charging

How to Add and Delete Users on Ubuntu 14.04 Server

Once a new server is created, you will be only given the root privilege. If you want other users to access the same sever, you need to add users accordingly. After adding the users you can give super user privileges to the new user too. In this post, I will show you how to add, delete users and assign sudo privileges to the users.

1. How to Add User

If you are signed in as a root user

adduser username

If you are not signed in as a root user but have sudo privilege, you can enter

sudo adduser username

After you enter the command, you will be asked some questions

enter password

re-enter password

Once you have entered the password, you will be asked to enter user details. This is optional and can be skipped by hitting ENTER button. At the end, you will be asked to confirm by pressing 'Y'.

You have successfully created a new user. Now you can login using the username and password.

2. How to Grant Sudo Privileges to the New User

If you want to the new user to have sudo privilege, then you need to add the user to the sudo file

If you are signed in as a root user

visudo

If you are not signed in as a root user but have sudo privilege, you can enter

sudo visudo

Search for the line that looks like

root    ALL=(ALL: byALL) ALL

Here, all you need to do is just below this line copy and paste the same and replace 'root with the 'username' of the new user

root    ALL=(ALL:ALL) ALL
username    ALL=(ALL:ALL) ALL

Now, save and close the file.

The new user has sudo access and can execute commands.

3. How to Delete User

In some cases, you need to delete the users once their work is done. You can do the same this way

If you are signed in as a root user

deluser username

If you are not signed in as a root user but have sudo privilege, you can enter

sudo deluser username

Above command will delete the user from your machine.

If you want to delete the user's home directory, enter the command

If you are signed in as a root user

deluser --remove-home username

If you are not signed in as a root user but have sudo privilege, you can enter

sudo deluser --remove-home username

If you have given sudo privilege to the deleted user, then don't forget to remove the previously added line in the visudo file

root    ALL=(ALL:ALL) ALL
username    ALL=(ALL:ALL) ALL  #Delete this line

Congratulations, you have successfully added, deleted and assigned sudo access to the new user.

Xiaomi Redmi Note 4 Launched in India Starting Rs. 9,999

Xiaomi has launched Redmi Note 4 smartphone in India. It is available in Gold, Grey, and Silver colour variants, with a brand new Matte Black colour variant coming soon. The 2GB RAM with 32GB storage is priced at Rs. 9999, the 3GB RAM with 32GB storage is priced at Rs. 10,999 and the 4GB RAM with 64GB storage is priced at Rs. 12,999. The smartphone will be exclusively available via online shopping partner Flipkart and Mi.com starting from 23rd January, 12 noon. No pre-registrations required for the sale.

Xiaomi Redmi Note 4 features 5.5-inch (1920 x 1080 pixels) Full HD 2.5D curved glass display powered by 2.1GHz Deca-Core MediaTek Helio X20 processor with Mali-T880MP4 GPU. It comes in three variants, the 2GB/3GB RAM with 32GB storage and 4GB RAM with 64GB storage. It sports a 13MP rear camera with dual-tone LED Flash, PDAF and a 5MP front facing camera. It runs on MIUI 8 based on Android 6.0 Marshmallow and has 4100 mAh battery.

Xiaomi Redmi Note 4

Key Features :

• 5.5-inch (1920 x 1080 pixels) Full HD 2.5D curved glass display
• 2.1GHz Deca-Core MediaTek Helio X20 processor with Mali-T880MP4 GPU
• 2GB/3GB RAM with 32GB storage
• 4GB RAM with 64GB storage 
• 13MP rear camera with dual-tone LED Flash, PDAF
• 5MP front facing camera
• MIUI 8 based on Android 6.0 Marshmallow
• Hybrid Dual SIM (micro + nano/microSD)
• Fingerprint sensor, Infrared sensor
• 4G VoLTE, Wi-Fi 802.11 ac, Bluetooth 4.2, GPS + GLONASS
• 4100 mAh battery

Installing MongoDB on Ubuntu 14.04

MongoDB is a free and open-source cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like documents with schemas. MongoDB is developed by MongoDB Inc. and is free and open-source, published under a combination of the GNU Affero General Public License and the Apache License.

Step 1 -- Import the Public Key

First, we will import the MongoDB GPG public key.

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10

Step 2 -- Create a List File

Now, we will add the MongoDB repository details so APT will know where to download the packages from.

echo "deb http://repo.mongodb.org/apt/ubuntu "$(lsb_release -sc)"/mongodb-org/3.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list

Step 3 -- Update the packages

sudo apt-get update

Step 4 -- Install MongoDB

sudo apt-get install -y mongodb-org

Step 5 -- Start the service

sudo service mongod start

Step 6 -- Check the service

sudo service mongod status

You have successfully install MongoDB on your machine.

Lenovo P2 with 3GB/4GB RAM, 5100mAh Battery Launched in India

Lenovo has launched P2 smartphone in India. It is available in Champagne gold and Graphite gray colors and is priced at Rs. 16,999 for the 3GB RAM variant and Rs. 17,999 for the 4GB RAM variant. The smartphone will be available exclusively on Flipkart from Wednesday midnight. Lenovo P2 launch day offers in India include an exchange offer of up to Rs. 2,000 when exchanging an old smartphone, and 10 percent discount on SBI credit cards.

Lenovo P2 features 5.5-inch (1920 x 1080 pixels) Full HD Super AMOLED display powered by 2GHz Octa-Core Snapdragon 625 14nm processor with Adreno 506 GPU and 3GB / 4GB RAM. It has an internal storage of 32GB and can be expanded via microSD up to 128GB. It sports a 13MP rear camera with dual-tone LED flash, PDAF and a 5MP front-facing camera. It runs on Android 6.0.1 Marshmallow and has 5100 mAh built-in battery with fast charging.

Lenovo P2

Key Features:

• 5.5-inch (1920 x 1080 pixels) Full HD Super AMOLED display
• 2GHz Octa-Core Snapdragon 625 14nm processor with Adreno 506 GPU
• 3GB / 4GB RAM
• 32GB internal storage, Expandable via microSD up to 128GB
• 13MP rear camera with dual-tone LED flash, PDAF
• 5MP front-facing camera
• Android 6.0.1 Marshmallow
• Hybrid Dual SIM (nano+nano/microSD)
• Fingerprint sensor
• 4G VoLTE, WiFi 802.11 b/g/n, Bluetooth 4.1 LE, NFC
• 5100 mAh built-in battery with fast charging

Nokia 6 with 4GB RAM, Android 7.0 Nougat, Fingerprint Sensor Announced

HMD Global has launched Nokia 6 smartphone in China. It is available in Black color, is priced at 1699 CNY (roughly Rs. 16,750). The smartphone is exclusively available from JD.com in the first half of 2017 in China and is also exclusive to China. The company says it has no plans to launch the Nokia 6 in other markets though it confirmed that the "Nokia 6 marks the first step for the Nokia brand into Android smartphones with more to come in H1 2017."

Nokia 6 features 5.5-inch (1920 x 1080 pixels) 2.5D curved glass display with Corning Gorilla Glass 3 powered by Octa-Core Qualcomm Snapdragon 430 ( 4 x 1.2 GHz Cortex A53 + 4 x 1.5 GHz Cortex A53) 64-bit processor with Adreno 505 GPU and 4GB LPDDR3 RAM. It has an internal storage of 64GB and can be expanded via microSD up to 128GB. It sports a 16MP rear camera with dual-tone LED flash, PDAF and a 8MP front-facing camera. It runs on Android 7.0 Nougat and has 3000 mAh built-in battery.

Nokia 6

Key Features:

• 5.5-inch (1920 x 1080 pixels) 2.5D curved glass display with Corning Gorilla Glass 3
• Octa-Core Qualcomm Snapdragon 430 ( 4 x 1.2 GHz Cortex A53 + 4 x 1.5 GHz Cortex A53) 64-bit processor with Adreno 505 GPU
• 4GB LPDDR3 RAM
• 64GB internal storage, Expandable via microSD up to 128GB
• 16MP rear camera with dual-tone LED flash, PDAF
• 8MP front-facing camera
• Android 7.0 Nougat
• Dual SIM
• Fingerprint sensor
• Dual speakers, Dual smart amplifiers (TFA9891), Dolby Atmos
• 4G LTE, WiFi 802.11 b/g/n, Bluetooth 4.1, GPS, USB OTG
• 3000 mAh built-in battery

Central Govt Launches BHIM App for Online Payments

Prime Minister Narendra Modi on Friday launched Bharat Interface for Money – BHIM – an app that lets users make payments using Unified Payment Interface.

Only available on Android for now, the app lets users pay and receive money with no processing fee. A transaction cost, however, may be levied by the user’s bank. For now, the app lists 30 banks including SBI, HDFC, ICICI, Union Bank of India, South India Bank, and Standard Chartered, among others. To find the app on the Play Store, search for BHIM UPI or click here to download the app.

For a transaction to happen, both, the sender and the receiver must have an account with a bank that has UPI enabled. The account holder does not need to have mobile banking activated as the App automatically fetches user data, but the user’s mobile number must be registered with the bank.

The app comes with features such as the ability to send and receive money, linking accounts, saving user profiles, changing languages, recording beneficiary details and providing balance enquiry. Banks, which currently have individual UPI apps, can reportedly either endorse the common app or allow customers to use in-house apps that may be loaded with more features.

Once users links UPI-based payment service with their respective bank accounts using smartphones or feature phones, they can use BHIM app for transactions. The app is topping the charts on Google's Play Store in India with a rating of 4.1. "Bhim App - 3 million download since launch, No 1 on Playstore in India amongst all apps, over 500,000 transactions since launch. #MakeinIndia," Kant said in a tweet.

#Bhim App - 3Mln download since launch, No1 on Playstore in India amongst all Apps, over 500,000 transactions since launch. #MakeinIndia

— Amitabh Kant (@amitabhk87) January 2, 2017