As you may have seen, the Lubuntu team (which I am a part of) has started the migration process to LXQt.
Also in this image are our candidates (not final yet) for applications that will be included in Lubuntu.
Having this image will help us gauge how much system resources are used, and gives us the ability to run some benchmarks on the desktop. I've been using LXQt for a while now, and it has a lot of advantages not only in applications, but the desktop itself. Here is our blueprint that will be updated a lot in the next week or so that will tell you more about the transition. An entirely reasonable question given that I had entirely failed to provide clarity on how my content is licensed on each page. To clarify, all content on my blog is licensed under the Creative Commons Attribution Share-Alike license. So, thata€™s what you are allowed to do, but what would I selfishly love you to do with my content?
Share it a€“ I try to write things on this blog that are helpful to others, but it is only helpful if people read it. Include and reference it in other work a€“ I always love to see my work included and referenced in other blog posts, books, research papers, and elsewhere. Translate it a€“ I would love to see my posts translated into different languages, just like Elio offered to do.
Of course, if you have any other questions, dona€™t hesitate to get in touch and whether you just read my content or choose to share, derive, or translate it, thanks for being a part of it!
Just a quick note to let you know that I will be zooming my way on the reddest of red eyes to Pittsburgh, PA to speak at Abstractions next week.
I first heard about Abstractions some time ago and I was pretty stunned by the speaker roster which includes Jeffrey Zeldman, Richard Stallman, Mitchell Hashimoto, Larry Wall, and others. I am hoping I will get an opportunity to see many of you there (details of how to attend are here), and I want to offer a huge thanks to the Abstractions team for their kindness, hospitality, and service.
We share a Command Line Lurve, himawaripy (via Joey at OMG Ubuntu), which takes photos of the world from a satellite. And we go over all your amazing feedback a€“ thanks for sending it a€“ please keep sending it!
We discuss building MATE Desktop from source using reference packages for Debian and Slackware.
Since I started working with a global team Ia€™ve hit the unforgiving thing called Time Zones, so my first feature will be covering the a€?Digital Clocka€™ widget.
But if you have the widget on your desktop you have to press and hold it with left click like so. Ever since ita€™s creation back in the dark ages, APT shipped with ita€™s own build system consisting of autoconf and a bunch of makefiles. I also tried building the package on a Fedora docker image (with dpkg installed, ita€™s available in the Fedora sources). A couple for the developers out there, the lovely new slidy and shiny mobile UI framework Kirigami just got released and packages are available in KDE neon.
And Qta€™s new web widget QtWebEngine with Chromium goodness now has packages in neon, will we see a KDE web browser appear again?
There is a category of libraries which considers the portable binaries issue to be a terminal one.
Recently there was a blog post describing an example library which can be built as a shared library, or as a static library, or used directly as a a€?header onlya€™ library which doesna€™t require the user to link against anything to use the library.
However, there is yet a fourth option, and that is for the consumer to compile the source files of the library themselves. Additionally, of course, the CMake GenerateExportHeader module should be used, but I didna€™t want to change the source from Vittorio so much.
This blog post is not a CMake introduction, so to see what all of those commands are about start with the cmake-buildsystem and cmake-packages documentation. The next two are INTERFACE libraries, a concept I introduced in CMake 3.0 when it looked like Boost might use CMake. The library_iface library functions as described in the blog post from Vittorio, in that users of that library will be built with LIBRARY_HEADER_ONLY and will therefore #include the .cpp files. So, it is up to the consumer how they consume the library, and they determine that by using target_link_libraries to specify which one they depend on. Leta€™s connect to the container, update the package list and upgrade any available packages.
With the new, just released version, you also now get file versioning, which allows you to "rollback" to previous versions; file-level encryption, Web-based drag and drop file management, and a built-in Open Document Format (ODF) preview. In addition, ownCloud 4 includes an "experimental" feature for mounting of external file systems--including Dropbox, FTP and Google Drive--enabling users to have all their file sync and share tools in a single ownCloud interface.
Or, if you like the idea, but don't have the expertise, ownCloud offers commercial support options. Log in and get the required packages via apt-get commands – see this site for details. If your ownCloud server is accessible from the internet, you should use SSL encryption to secure your data.
Digicert has a good guide for creating the certificate request with your local Apache Server and how to integrate the final certificate.
The AD connection configuration itself can be quite tricky, but you can compare your settings to the following screenshots. In this feature we will be building our own cloud system, a cloud storage system to be precise. Downtime: Sometimes you may lose access to your files because of server issues faced by your service provider. Privacy: Since your files are hosted elsewhere, they may be viewable to certain third-party agencies (like governments) without your consent.
Features and restrictions: Most of these proprietary services do not have a lot of features and are very restrictive in terms of what you can do with the files. Once you have enabled the necessary modules, you can restart the service to apply the changes. If you have lots of users for your cloud, then creating individual users again in ownCloud could become tedious. To install additional user authentication back- ends, log into ownCloud, click Settings (gears icon) then Select Apps, then select an App which is not represented with bold fonts, then click Enable in the right pane.
The following shows an example of using the user_external app for authenticating from IMAP, SMB and FTP. Desktop sync clients can be used for continuous sync, selective folder sync, multi-folder sync. One of the best features about having your own setup is that you can customise it to your own needs.
To see how to install apps in ownCloud, in this section we will install the Notes app, which provides notes functionality for ownCloud. Other apps may require additional steps; check with the documentation of the apps you are installing.
As you can see, creating your own personal cloud has some real benefits in terms of the features and the flexibility. Follow our to find out about all the latest Linux news, reviews, previews, interviews, features and a whole more.
I am interested in learning how to learn how to develope cloud apolications using a Linux development environment if anyone can point me in a good path to learn I would appreciate it.


It's going to be a long process, but I thought I might write about some of the things that goes into this process. I've been running LXQt with the Lubuntu artwork as my daily driver for a few months now, and there's a lot missing that needs to be tweaked.
The two outstanding merge proposals adding this have been merged, and we're now waiting for the images to be spun up and added to the ISO QA Tracker for testers. We need to create some LXQt-specific test cases and make sure the ISO QA test cases are working before we can release a reliable image to our users.
We created a blueprint last cycle tracking our progress with test cases, and the sooner that those are done, the sooner Lubuntu can make the switch knowing that all of our selected applications work fine. We need to pick the applications that best suit our users' use cases (a lot of our users run on older hardware) and needs (LibreOffice for example). Depending on how notable some things are, I might do a blog post in the future, otherwise, see for yourself.
I have been a long-time free culture and Creative Commons fan, supporter, and artist (see my archive of music, podcasts, and more here), so this license is a natural choice.
So, your help sharing and submitting my posts on and to social media, news sites, other blogs, and elsewhere is super helpful. If you do make a translation, let me know so I can add a link to it in the original article.
The team have clearly worked hard to put together a solid event with a great line-up, professional look and feel, great speaker relations, and more.
The challenge is that building empowered, productive, and inclusive communities is complex work that lives in the connective tissue between technology and people. Ideally, you want thing to be something that you think is recent, and old thing to be something that you think is ancient, and therefore youa€™ll be surprised that thing really isna€™t actually recent and thata€™s because youa€™re a decrepit oldA codger.
By definition, anything that happens before you were born feels like a long time ago to you. Ia€™m sorry to report that those of you who love that a€?Fuzzy Clocka€™ widget are missing this feature.
In 2009, I felt like replacing that with something more standard, and because nobody really liked autotools, decided to go with CMake.
A few months ago, we noticed that our build system had trouble with correct dependencies in parallel building. In make, the byproducts remain undeclared, though, while in CMake we can now actually express them, and they are used by the Ninja generator and the Ninja build tool if you chose that over make (try it out, ita€™s fast).
While I could eventually get the programs build and most of the integration test suite to pass, there are some minor issues to fix, mostly in the documentation building and GTest department: Fedora ships its docbook stylesheets in a different location, and ships GTest as a pre-compiled library, and not a source tree. Libraries like Qt distribute dynamically compiled binaries for major platforms and other libraries have comparable solutions. Boost is a widespread source of many a€?header onlya€™ libraries, which dona€™t require a user to link to a particular platform-compatible library binary. The claim is that it is useful for libraries to provide users the option of using a library as a a€?header onlya€™ library and adding preprocessor magic to make that possible. I dona€™t have an opinion on whether good idea in general for libraries to do things like this, but if people want to do it, it should be easy as possible.
The first two serve the purpose of building the library as a shared library and then as a static library. The INTERFACE target can be used to specify header-only libraries because they specify usage requirements for consumers to use, such as include directories and compile definitions. Currently, there is only one server location atA RA?mlang, near Zurich (the capital city of Switzerland).
You and I use cloud storage services like DropBox, Google Drive, and Amazon Cloud Drive every day. With it you can store your files, folders, contacts, photo galleries, calendars and more on a server of your choosing. It now includes system logging and enables administrators to manage users and groups from Lightweight Directory Access Protocol (LDAP) or Active Directory (AD). No, it's not as easy as Dropbox nor as powerful as the Amazon Cloud, but it lets me run my own file sync and share services on my own hardware and storage, and use public hosting and storage offerings.
Heck I have built things like this over the years, but ownCloud brings everything I need in one place so that I can run my own cloud my own way.
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You use them by agreeing to certain terms and conditions (we bet you haven’t even read them) that can be changed at any given time by the service providers. This can very problematic if you are unable to gain access to one of your important files when you really need it. If you are planning to use any other database you will also need to install the respective database together with its PHP driver. To do that, the web server user (www-data for Debian-based distributions) must own apps, data and config directories of the installation. Multi-folder sync means you can sync multiple ownCloud folders to multiple folder locations.
The ownCloud developers say that this is because of Apple’s policy on open source applications in the App Store. Using ownCloud, you not only get to customise it but also have the ability to add more features to it.
Notes is a very capable note-taking app which supports MarkDown and syncing to standalone note-taking apps. So while you have the ability to install the package and play around with it, it needs to be a lot different to be usable. Every application will most likely need a week or two to do proper benchmarking and testing, but if you have a suggestion for an application that you would like to see in Lubuntu, share your feedback on the blueprints. You will now see a licensing blurb at the bottom of each post as well as a licensing drop-down item in the menu. In this new presentation from Jono Bacon, he will share some insight into how you can build an exoskeleton that wraps around community members to help them to do great work, form meaningful relationships, and help each other to be successful. But, looking through the list, I think that theya€™re probably all gems, but whether they hit home for you depends on how old youA are. And the gap between thing and old thing is the same as the gap between thing and now (because thata€™s what constructs the sentences). With this widget I can add Time Zones by simply right-clicking the widget if ita€™s one of your panels already or on your desktop.If the widget is in the panel then you can just right click it like so. Targets can in some cases depend on files (generated by a command in the same directory), but overall files are not really targets. To really understand this content you need to be familiar with parts [1], [2], [3] and [4].We will go all the way, from branching snapd all the way to running a program that uses our new interface. Linking works differently, compilers bundle different code into binaries on each platform etc. On a personal level, we all store and retrieve data and we do this on multiple devices, like PCs, smartphones, tablets and media players.
Before you move on, you may ask what is the point in doing this when we already have such popular services on our disposal. OwnCloud started its life as a The KDE cloud computing project and is now available on almost all popular platforms. The good thing about WebDAV is that the clients are already built into all the popular operating systems, such as Linux, Mac OS X and Windows.
This is an important feature which is not even provided by most popular cloud service providers.


The ownCloud developers have made sure that you don’t miss your data anywhere by creating sync clients for both desktops and mobile devices. This is the best way to let us know what you would like to see and your feedback on the existing applications before we make a final decision.
The presentation will delve into success stories in open source and elsewhere, the underlying behavioral principles we can tap into, infrastructure and workflow decisions, and how we get people through the door and involved in our projects. You also cannot have a target with the same name as a file you are generating in a custom command, you have to rename your target (make is OK with the generated stuff, but ninja complains about cycles because your custom target and your custom command have the same name).
With ownCloud, an open source file sync and share project, which began as a KDE project, you can keep your data on your servers and decide what other public cloud services you want to integrate into your personal cloud. You can also sync your date with local devices and share your data either with the world at large or specific approved users.
This should make it easier to build applications on top of ownCloud's built-in capabilities. Cloud computing in a more general sense means making computing resources (like storage, processing power, software etc) available in the form of services (on public or private networks) which can then make those resources available from any other system. Extract the owncloud package in the web server root directory When in doubt, look at the Apache configuration file. Stuff that happens while youa€™re a young child also feels like a long time ago a€” you were a kid when it happened! Still, this knowledge will be invaluable next time where we will try to do something more complicated.Adding the new "hello" interfaceLet's get started.
For now, I can recommend anyone who's Linux savvy and wants their own customized cloud service to give it a try. In the old days, we had to manually sync every other device to a central location to have the same copy of data everywhere else. If you are only doing a test setup, you can use SQLite, which is a zero configuration database system.
If you do not have a separate database user configured then you can use the root username; ownCloud will create a dedicated database with a dedicated db user for use with ownCloud.
The Android version of the app also allows you upload files from any Android app and offers automatic favourite file syncing. As we have seen, you can choose from a wide variety of storage (including other cloud services) as well as plenty of very unconventional authentication mechanisms.
If you are running an existing project or company, or starting something new, be sure to get along to this presentation, all delivered in Bacona€™s trademark loose and amusing style.
The latter feature will keep all your favourite files synced with the mobile device all of the time. After activation, refresh the ownCloud page and you’ll see Notes in the left navigation bar.
If you still think there is something missing in ownCloud that you want, well fear not: you can add that feature yourself. Watch out for a future tutorial on how to write ownCloud apps on Linux User & Developer. Thus, we take a big list of pop culture things, find an event which happened between the ages of 12 and half your current age, find a corresponding old event, display them to you, and have you be surprised and displeased. In most of the cases this place is the central system from where we are syncing the other devices.
This method is still not that bad if you are doing this between just two devices; but when you go beyond that, you will always think that there must be a better way to do this. Please make comments to ourA mailing list, on the forums (with a tag indicating that this is from 16.04 or xenial), or in #ubuntu-mythtv on Freenode.
At the end of the exercise you should be able to build your fork of snapd (make sure it is really your fork, not the upstream version!)Let's look around. Static analysis checkers in the snappy tree enforce this so your code won't be able to land without first being formatted correctly.This code is perfectly fine, if a little verbose (we'll get it shorter eventually, I promise). I've decided to just use an init() function so that all of the changes are in one file and cause less conflicts for other developers creating their interfaces. All the commits are prefixed with the directory where the changes were made, followed by a colon and by the summary of the change.
Normally I would also add longer descriptions but here this is not required as the changes are trivial.Seeing our interface for the first timeLet's run our changed code with devtools. If not just remove this directory and move your fork (that you may have cloned elsewhere) here and try again.Great. When designing real interfaces you have to think about what kind of action should grant extra permissions. Recall from part [3] that you can freely associate extra security snippets that encapsulate permissions either permanent or connection-based snippets on both plugs and slots.A permanent snippet is always there as long as a plug or a slot exists. Examples of such services could include network-manager, modem-manager, docker, lxd, x11 any anything like that. The granted permissions allow the service to operate as well as to create a communication channel (typically a socket or a DBus bus name) that clients can connect to.Connection based snippet is only applied when a connection (interface connection) is made. This permission is given to the client and typically involves basic IPC system calls as well as a permission to open a given socket (e.g. The prime example of this use case is the network interface which grants access to several network system calls. This interface grants nothing to the slot, just to connected plugs.Today we will explore that last case. Our hello interface will give us access to a system call that is usually forbidden, rebootThe graceful-reboot snapFor the purpose of this exercise I wrote a tiny C program that uses the reboot() function. This tells snapcraft and snapd that we really really don't want to run this snap in devmode where all sandboxing is off. Let's run the command now (don't worry, it won't reboot)$ graceful-rebootBad system callAha!
As we know from part [4]A that seccomp, which is a part of the sandbox system, blocks all system calls that are not explicitly allowed. While this case was pretty obvious, library functions don't always map to system call names directly.
There are often cases where system calls evolve to gain additional arguments, flags and what not and the name of the library function is not changed.Adjusting the hello^Hreboot interfaceAt this stage we can iterate on our interface. We will also grant a connected plug permission, through the seccomp security backend, to the use the reboot system call.
You can try to make the necessary changes yourself but I provide the essential part of the A patch below.
The profile is derived from the base seccomp template that is a part of snapd source code and the set of plugs, slots and connections made to or from this snap.
If you rename an interface while working on it, snapd may print a message (to system log, not to the console) about being unable to reconnect the "hello" interface because that interface no longer exists in snapd. To make snapd forget all those connections simply remove and reinstall the affected snap.You can experiment by editing seccomp profiles directly.
Let's try the graceful-reboot command again.$ graceful-rebootInsufficient permissions to reboot the systemThe process didn't get killed straight away but the reboot call didn't work yet either. It was my most common mistake when hacking on apparmor profiles.Let's patch the interface and re-run refresh-bits and re-install the snap.
The abbreviation helps in code reviews and in just conveying the meaning and intent of the interface.You can find the source code of this interface in my github repository.



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Comments

  1. 20.01.2014 at 19:31:13


    There is still nothing happening which is meant to promote safe and secure get one of the following error.

    Author: KISA
  2. 20.01.2014 at 22:17:25


    Download it every time you allocated storage capacity and.

    Author: EFIR_QAQASH