Linux Blimp

hostnamectl method

Since Ubuntu 16.04 (and most recent Linux distros) use Systemd you can simply use the hostnamectl command to change hostname. To see current setting, run your Terminal just type the following command:

$ hostnamectl
Sample output:

Static hostname: lappy686 Icon name: computer-laptop Chassis: laptop Machine ID: 52ff3d3eefa19d99891c3cf4b70a138b Boot ID: fefe3aaf139855243a837001fedc7713 Operating System: Ubuntu 18.04 Kernel: Linux 4.16.0-33-generic Architecture: x86-64

To change hostname from lappy686 to ulng-laptop, enter:
$ hostnamectl set-hostname ulng-laptop

Type hostnamectl again to see that the hostname has updated.

Classic Method

If you don’t have such a new machine, then you can perform the following steps:

Type the following commands:
$ sudo hostname new-hostname-here

Next edit the /etc/hostname file and update hostname:
$ sudo nano /etc/hostname

Finally, edit the /etc/hosts file and update the lines that contain your old hostname:
$ sudo nano /etc/hosts

From:
127.0.1.1 old-host-name

To:
127.0.1.1 new-hostname-here

Save and close the file.

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Developing mobile apps for your business is one of the most crucial steps to make sure that your company becomes a household name. However, you must keep in mind that every day hundreds and thousands of apps are being developed all around the world and many of them belong to your specific category.

When you contact a company that develops mobile apps, you must be aware of the processes they use to create your product app so you can be sure about the quality of the app. Here are some of the major aspects of developing an app that can guarantee its success:

App Concept

The first thing that you need to focus on is coming up with a great app concept. It is important that your app provides your target customers with a certain value. The app should also resolve a particular problem that is common in your industry. In this fast-changing domain of app development, there is always fierce competition and in order to stay ahead of the game, you should make your app different from the rest. Therefore, it is necessary that you do a lot of market research so that you can come up with great ideas on making an app that is way ahead of the rest.

App Strategy

Once you have a well-placed app concept, you must come up with an app strategy that ensures its success. For this, you will have to study your app competition and find out the ideas they are coming up with. You will also have to monetize your app since in all probability you are looking to make money out of it. Some of the app monetization methods that can work include in-app purchases, premium features, subscription payments, selling user data, ad-revenue as well as traditional paid apps. The next important aspect of your app strategy would involve the ways you choose to promote and market your app. Promoting anything isn’t easy. And you should do further research on the best ways to market your app. Most common marketing technique for apps is SEO. You will also need to envision a roadmap for your app to understand the prospects of your app in the coming future. This will help you to come up with ways to expand your app and make it more valuable to your audience.

Designing user experience

When you are looking to design the user experience of your app, you will need to deal with the information architecture that will help you to decide what kind of functionality and data must be presented in the app and the ways in which they can be organized. The other important aspect of planning the user experience is to implement workflows that can help your users navigate the app. This also helps in making the app more user-friendly. You will also have to come up with click-through models for testing the wireframes and workflows.

User-interface design

This is the step that involves creating the aesthetic elements of the app. You will have to work with style guides that can serve as major cornerstones for deciding on the look of your app. The next thing you will need to work with is rendered design. The rendered design works as a process through which you can take the wireframes and then replace grayscale elements with unique elements from the style guide. Mockplus has a great list of UI designs you can use for inspiration. You can find thousands of great designs online. Finally, you will have to test the app using rendered click-through models to make sure that the design is working perfectly.

Designing the app with a Tech Stack

This step involves the front end and back end design with a number of important technologies. The way you manage the front end designing of the app at this phase determines whether it is a native or hybrid app. The back-end development focuses on the language, database and hosting environment that determines the scalability of the code writing process. Make sure to pay extra attention to the hosting provider you choose and whether or not it supports the software and services you’re planning on using.

This is just the tip of the iceberg when it comes to app development. You can do your own research and learn more about each step of the process, or you can get an app development company to do it all for you.

About the Author

This article was submitted to us by a third-party writer. The views and opinions expressed in this article are those of the author and do not reflect the views and opinions of ThisHosting.Rocks. If you want to write for ThisHosting.Rocks, go here.

Peter Kudlacek is a CEO at Apro Software. Peter has done outsourcing for the last 15 years and after all those years they pretty much nailed their software development processes.

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The new experimental feature of Steam allows you to play Windows-only games on Linux. Here’s how to use this feature in Steam right now.

You have heard the news. Game distribution platform Steam is implementing a fork of WINE to allow you to play games that are available on Windows only. This is definitely a great news for us Linux users for we have complained about the lack of the number of games for Linux.

This new feature is still in beta but you can try it out and play Windows-only games on Linux right now. Let’s see how to do that.

Play Windows-only games in Linux with Steam Play

You need to install Steam first. Steam is available for all major Linux distributions. I have written in detail about installing Steam on Ubuntu and you may refer to that article if you don’t have Steam installed yet.

Once you have Steam installed and you have logged into your Steam account, it’s time to see how to enable Windows games in Steam Linux client.

Step 1: Go to Account Settings

Run Steam client. On the top left, click on Steam and then on Settings.

Step 2: Opt in to the beta program

In the Settings, select Account from left side pane and then click on the CHANGE button under Beta participation.

You should select Steam Beta Update here.

Once you save the settings here, Steam will restart and download the new beta updates.

Step 3: Enable Steam Play beta

Once Steam has downloaded the new beta updates, it will be restarted. Now you are almost set.

Go to Settings once again. You’ll see a new option Steam Play in the left side pane now. Click on it and check the boxes:

• Enable Steam Play for supported titles (You can play the whitelisted Windows-only games)
• Enable Steam Play for all titles (You can try to play all Windows-only games)

I don’t remember if Steam restarts at this point again or not but I guess that’s trivial. You should now see the option to install Windows-only games on Linux.

For example, I have Age of Empires in my Steam library which is not available on Linux normally. But after I enabled Steam Play beta for all Windows titles, it now gives me the option for installing Age of Empires on Linux.

Windows-only games can now be installed on Linux

Things to know about Steam Play beta feature

There are a few things you should know and keep in mind about using Windows-only games on Linux with Steam Play beta.

• At present, only 27 Windows-games are whitelisted for Steam Play. These whitelisted games work seamlessly on Linux.
• You can try any Windows game with Steam Play beta but it might not work all the time. Some games will crash sometimes while some game might not run at all.
• While in beta, you won’t see the Windows-only games available for Linux in the Steam store. You’ll have to either try the game on your own or refer to this community maintained list or a better-looking web version of the same to see the compatibility status of the said Windows game. You can also contribute to the list by filling this form.
• If you have games downloaded on Windows via Steam, you can save some download data by sharing Steam game files between Linux and Windows.

I hope this tutorial helped you in running Windows-only games on Linux. Which game(s) are you looking forward to play on Linux?

About Abhishek Prakash

I am a professional software developer, and founder of It’s FOSS. I am an avid Linux lover and Open Source enthusiast. I use Ubuntu and believe in sharing knowledge. Apart from Linux, I love classic detective mysteries. I’m a huge fan of Agatha Christie’s work.

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PostgreSQL is an open source, powerful, reliable, stable, enterprise-ready and free object-relational database system in the style of MariaDB, MySQL or SQLite projects. It’s an ACID (Atomicity, Consistency, Isolation, Durability) compliant database server/engine that can be highly customized and includes numerous attractive features, making a great replacement for the aforementioned database engines.

Features at a glance

Key features include support for foreign keys, views, joins, triggers and stored procedures, support for multiple languages, support for a wide range of SQL data types, including BOOLEAN, CHAR, INTEGER, NUMERIC, VARCHAR, INTERVAL, TIMESTAMP and DATE.

In addition, the software comes with support for storaging binary large objects, including all sorts of multimedia files (video, audio and photo), and provides developers with native programming interfaces for the C, C++, Python, Perl, Ruby, Java, .Net, Tcl and ODBC programming languages.

Among other interesting features, we can mention MVCC (Multi-Version Concurrency Control), tablespaces, multibyte character encodings, point in time recovery, a mature query optimizer and planner, asynchronous replication, online backups, nested transactions (popularly known as savepoints), hot backups, write ahead logging for fault tolerance, support for international character sets, as well as Unicode support.

PostgreSQL in numbers

At the moment, the PostgreSQL database server supports unlimited size for databases, 32 TB should be the maximum size for tables, 1.6 TB per row, 1 GB per field, unlimited rows per table, supports between 250 and 1600 columns per table, depending on column types, and supports unlimited indexes per table.

Supported operating systems

The PostgreSQL has been successfully tested on all mainstream operating systems, including GNU/Linux, BSD, Solaris, HP-UX, AIX, SGI IRIX, Solaris, Tru64, Mac OS X and Microsoft Windows. PostgreSQL is available for download as a universal source archive, as well as pre-compiled binary packages for many Linux distributions, supporting both 32-bit and 64-bit architectures.

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Oct 23, 2018, 06:00

The objective of this article is to install the NVIDIA drivers on Ubuntu 18.10 Cosmic Cuttlefish Linux. This article will discuss three methods of Nvidia driver installation in the following order: 1. Automatic Install using standard Ubuntu Repository. 2. Automatic Install using PPA repository to install Nvidia Beta drivers. 3. Manual Install using the Official nvidia.com driver.

Complete Story

Related Stories:

• Desktop plans for Ubuntu 18.10(May 20, 2018)
• Cue the Cosmic Cuttlefish(May 09, 2018)
• Ubuntu 18.10 Cosmic Cuttlefish New Features(Sep 18, 2018)
• Here’s the New Login Screen of Ubuntu 18.10 (Cosmic Cuttlefish) with Yaru Theme(Aug 01, 2018)
• Ubuntu 18.10 (Cosmic Cuttlefish) Enters Feature Freeze, Beta Lands September 27(Aug 28, 2018)
• Ubuntu 18.10 Brings Cosmic Cuttlefish to the Linux Desktop(Oct 12, 2018)
• Mark Shuttleworth Details Ubuntu 18.10 Cosmic Cuttlefish Linux Release(Oct 19, 2018)

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Last week Corsair announced the Force Series MP510 M.2 PCIe NVMe solid-state drives as the company’s fastest SSDs to date. While being Corsair’s latest and fastest NVMe SSDs, the pricing is competitive with the 240GB model starting out at $70 USD, 480GB for $130 USD, $239 for 960GB, or $475 for a 1920GB version.

 

 

Given a number of Phoronix readers asking about MP510 Linux benchmarks (including some premium supporters), I ended up buying a MP510 240GB solid-state drive for carrying out some Linux tests as Corsair hadn’t supplied any review samples for Linux benchmarking.

 

 

The Corsair Force MP510 240GB model is rated for sequential reads up to 3100MB/s, sequential writes up to 1050MB/s, random writes up to 240K IOPS, and random reads up to 180k IOPS. The MP510 SSD relies upon 3D TLC NAND Toshiba memory and a Phison PS5012-E12 controller. The MP510 drive is rated for 400 TBW endurance, 1.8 million hours MTBF, and is backed by Corsair with a five-year warranty.

 

 

These fresh NVMe SSD benchmarks were done on Ubuntu 18.10 while using an EXT4 file-system and the stock Linux 4.18 kernel. Tests were done using a Ryzen 7 2700X system and the different solid-state drives benchmarked for this comparison included the following NVMe SSDs: Corsair Force MP500 120GB, Corsair Force MP500 240GB, Intel 600p 256GB, Intel 800p 128GB, Samsung 950 PRO 256GB, and Samsung 970 EVO 256GB. Some older SATA 3.0 SSDs were also freshly benchmarked for reference purposes on Ubuntu 18.10. Those SATA 3.0 SSDs included the Toshiba TR-150 120GB, Samsung 860 EVO 500GB, and Samsung 850 PRO 256GB.

 

All of these solid-state drive benchmarks were carried out via the Phoronix Test Suite. If you want to see how your own Linux storage performance compares to the benchmarks shown in this article, simply install the Phoronix Test Suite and then run phoronix-test-suite benchmark 1810208-SK-CORSAIR5106 for your own fully-automated, side-by-side benchmark comparison.

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Ngx_cache_purge is a module which will allow the fastcgi_cache, proxy, SCGI and uWSGI caches to have content purged from them. The caches allow precompiled code to be served as opposed to running a new version each time. This can greatly reduce the amount of processing power per page request. This specific module allows that cached content to be purged when needed. To compile this module from source if you have done a source build of Nginx like this Nginx Compile From Source On CentOS. Adding the module is pretty straightforward. You can read more about the module here

First get the ngx_cache_purge package

wget -O /usr/src/ngx_cache_purge-2.3.tar.gz http://labs.frickle.com/files/ngx_cache_purge-2.3.tar.gz

Uncompress the package

tar xfvz ngx_cache_purge-2.3.tar.gz

cd to your Nginx build directory

cd /usr/src/nginx-1.11.13

Get the prior build configuration options

# nginx -V
nginx version: nginx/1.11.13
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC)
built with OpenSSL 1.0.1e-fips 11 Feb 2013
TLS SNI support enabled
configure arguments: –user=nginx –group=nginx –prefix=/etc/nginx –sbin-path=/usr/sbin/nginx –conf-path=/etc/nginx/nginx.conf –pid-path=/var/run/nginx.pid –lock-path=/var/run/nginx.lock –error-log-path=/var/log/nginx/error.log –http-log-path=/var/log/nginx/access.log –with-http_gzip_static_module –with-http_stub_status_module –with-http_ssl_module –with-pcre –with-file-aio –with-http_realip_module –without-http_scgi_module –without-http_uwsgi_module –with-http_realip_module

Copy all of the configure arguments and append –add-module=/path/to/ngx_cache_purge

./configure –user=nginx –group=nginx –prefix=/etc/nginx –sbin-path=/usr/sbin/nginx –conf-path=/etc/nginx/nginx.conf –pid-path=/var/run/nginx.pid –lock-path=/var/run/nginx.lock –error-log-path=/var/log/nginx/error.log –http-log-path=/var/log/nginx/access.log –with-http_gzip_static_module –with-http_stub_status_module –with-http_ssl_module –with-pcre –with-file-aio –with-http_realip_module –without-http_scgi_module –without-http_uwsgi_module –with-http_realip_module –add-module=/usr/src/ngx_cache_purge-2.3

Once configure has finished, You can go ahead perform a make and install it

make

make install

Then restart nginx

/etc/init.d/nginx restart

Run the following to ensure the module is now loaded:

nginx -V 2>&1 | grep ngx_cache_purge -o

It should return ngx_cache_purge if it is.

That is all you need to do to add the module to a Nginx build.

May 28, 2017LinuxAdmin.io

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Usually, the default software center in Ubuntu and other Linux handle the update of the firmware of your system. But if you encounter errors with it, you can use fwupd command line tool for updating the firmware of your system.

I use Dell XPS 13 Ubuntu edition as my main operating system. I have done a fresh installation of Ubuntu 18.04 on it and I cannot be happier with the hardware compatibility. Bluetooth, external USB headsets and speakers, multi-monitor, everything works out of the box.

The one thing that troubled me was one of the firmware updates that appeared in the Software Center.

Clicking on the Update button resulted in an error a few seconds later.

The error message was:

Unable to update “Thunderbolt NVM for Xps Notebook 9360”: could not detect device after update: timed out while waiting for device

In this quick tip, I’ll show you how to update the firmware of your system in Ubuntu.

Updating firmware in Ubuntu 18.04

One thing you should know that GNOME Software i.e. the software center in Ubuntu 18.04 is also capable of updating the firmware. But in situations when it fails for some reason, you can use the command line tool fwupd.

fwupd is an open source daemon that handles firmware upgrades in Linux based systems. It is created by GNOME developer Richard Hughes. Developers from Dell also contributed to the development of this open source tool.

Basically, it utilizes the LVFS, Linux Vendor Firmware Service. Hardware vendors upload redistributable firmware to the LVFS site and thanks to fwupd, you can upgrade those firmware from inside the operating system itself. fwupd is supported by major Linux distributions like Ubuntu and Fedora.

Step 1: Check if your system is supported by LVFS

Since LVFS depends upon hardware vendors, it’s a good idea to check if your system manufacturer supports this feature or not.

Find out your system model and then go to this web page and see if it’s listed:

Step 2: Using fwupd for updating fimrware

Normally, fwupd should already be installed on your Linux system. If not, install it using the package manager of your distribution.

Open a terminal and update your system first (commands applicable for Debian and Ubuntu-based distributions):

sudo apt update && sudo apt upgrade -y

After that you can use the following commands one by one to start the daemon, refresh the list of available firmware updates and install the firmware updates.

sudo service fwupd start

Once the daemon is running, check if there are any firmware updates available.

sudo fwupdmgr refresh

The output should look like this:

Fetching metadata https://cdn.fwupd.org/downloads/firmware.xml.gz
Downloading… [****************************]
Fetching signature https://cdn.fwupd.org/downloads/firmware.xml.gz.asc

After this, run the firmware update:

sudo fwupdmgr update

The output of the firmware update could be similar to this:

No upgrades for XPS 13 9360 TPM 2.0, current is 1.3.1.0: 1.3.1.0=same
No upgrades for XPS 13 9360 System Firmware, current is 0.2.8.1: 0.2.8.1=same, 0.2.7.1=older, 0.2.6.2=older, 0.2.5.1=older, 0.2.4.2=older, 0.2.3.1=older, 0.2.2.1=older, 0.2.1.0=older, 0.1.3.7=older, 0.1.3.5=older, 0.1.3.2=older, 0.1.2.3=older
Downloading 21.00 for XPS13 9360 Thunderbolt Controller…
Updating 21.00 on XPS13 9360 Thunderbolt Controller…
Decompressing… [***********]
Authenticating… [***********]
Restarting device… [***********]

This should handle the firmware update in Ubuntu 18.04. I hope this quick tip helped you with firmware updates in Linux.

If you have questions or suggestions, please feel free to use the comment section below.

About Abhishek Prakash

I am a professional software developer, and founder of It’s FOSS. I am an avid Linux lover and Open Source enthusiast. I use Ubuntu and believe in sharing knowledge. Apart from Linux, I love classic detective mysteries. I’m a huge fan of Agatha Christie’s work.

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Calibre is an open source e-book library management application designed for the 21th century, for the digital world that were are living in right now. It lets users to manipulate digital books in any way possible. It helps users to easily read ebooks on their personal computer, convert ebooks from one format to another, create electronic books based on recipes of your very own ideas.

Features at a glance

The software can download news from a sleuth of various sources, and comes with a content server for online access. Syncing ebooks to a supported mobile reader device is also possible with Calibre. E-book library management is the the main component of the application, displayed every time you open the application. From here, you can convert and organize e-books in a simple manner. It imports and exports many ebook formats, including ePub, MOBI, AZW, DOC, XML, etc. Just like any other software that can be extended via plugins, Calibre features an internal collection of add-ons, which provide support for editing metadata of ebooks, or add support for various ebook readers.

Supports a wide range of eBook reader devices

Among the supported devices, we can mention Amazon Kindle, Astak EZReader, Augen The Book, Barnes & Noble Nook, BeBook, Bookeen Cybook, Booq bq, Ectaco JetBook, Jinke Hanlin, Kobo, PocketBook, Sony, Sanda Bambook, as well as any other Android phone or tablet, and Apple’s iPhone, iPod and iPad devices.

Availability and supported OSes

The Calibre software is distributed as sources and binary archives for all major Linux operating systems. If you want to install Calibre on your Linux distribution, you should search the ‘calibre’ package in its default software repositories. However, the latest version will always be available right here on Softpedia.

Bottom line

We strongly suggest to use the Calibre application if you own an e-book reader device (see above supported devices) and you have a very large collection of electronic books.

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News briefs for October 24, 2018.

KDE is holding a Bug
Day on October 30, 2018. The Bug Day will focus on Konsole, and you can
join the #kde-bugs IRC channel on
Freenode at any time to participate.

The Qt Project is creating its own Code of Conduct. Phoronix
reports that the motivation is to “establish a formal line-in-the-sand about what is unacceptable behavior. We want new members of the Qt community to feel comfortable and accepted, and we want to foster a healthy working
environment for both current and new members.” You can find the proposed
Code of Conduct here.

Linus Torvalds discusses his return to Linux in an interview with ZDNet, and says he’s “starting the usual
merge window activity now”.
Regarding the Code of Conduct, he says: “I want to leave
it alone, and wait until we actually have any real issues. I’m hoping there
won’t be any, but even if there are, I want the input to be colored more by
real and *actual* concerns, rather than just people arguing about it.”
See the article for more details on what he’s been doing and other
news from the Maintainers Summit.

Tails
3.10.1 is now available. This release fixes several security issues,
so update as soon as possible. Also in this version Linux is updated to
4.8, the Tor Browser is updated to 8.0.3 and Thunderbird to 60.2.1. Tails
version 3.11 is expected in December.

OpenIndiana
Hipster 2018.10 was released today. Notable changes include MATE
updated to 1.20, Python 3.5 was added, the Image Packaging System received
many updates, and much more. See the release
notes for more details, and download it from here.

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