Source: tty – root profile error – Ask Ubuntu

I purchased few days ago this 315mhz rf kit http://www.ebay.ie/itm/121038336534?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_3567wt_1163 for a small robot i am building for my son. I was planning to record the signal the key fob sends with the famous rc-switch library(https://code.google.com/p/rc-switch/) and  then with those values do my stuff. Buttt i am not getting anything to the the serial monitor. In the past i used a 433mhz transmitter and it worked just fine but now i am just not getting anything. Any ideas – directions?

Source: rf-switch and 315mhz transmitter is a no go?

In computing, Ceph, a free-software storage platform, implements object storage on a single distributed computer cluster, and provides interfaces for object-, block- and file-level storage. Ceph aims primarily for completely distributed operation without a single point of failure, scalable to the exabyte level, and freely available.

Ceph replicates data and makes it fault-tolerant,^[6] using commodity hardware and requiring no specific hardware support. As a result of its design, the system is both self-healing and self-managing, aiming to minimize administration time and other costs.

On April 21, 2016, the Ceph development team released “Jewel”, the first Ceph release in which CephFS is considered stable. The CephFS repair and disaster recovery tools are feature-complete (snapshots, multiple active metadata servers and some other functionality is disabled by default).^[7]

Source: Ceph (software) – Wikipedia

Prusa i3 (i3 stands for third iteration of the design) is the latest design by me. There are countless variations of the design and it became a staple of 3D printing with tens, if not hundreds, of thousands units world wide. You can build simple one for couple hundred dollars or you can chip in more and get the state of the art 3D printer, it’s all up to you.It’s open functional design allows for quick maintenance. For example if our DumbExtruder™ (LOL) breaks you can clean it in couple seconds! This makes i3 great workhorse 3D printer for your business. Not to mention the ability to upgrade the printer as you wish without manufacturer forcing you to buy a new model! Future-proof FTW!

Source: Prusa i3 3D printer – Prusa Printers

Xen Project (pronounced as /ˈzɛn/ /prˈɒdʒɛkt/) is a hypervisor using a microkernel design, providing services that allow multiple computer operating systems to execute on the same computer hardware concurrently. It was developed by the Linux Foundation and is supported by Intel.

The University of Cambridge Computer Laboratory developed the first versions of Xen. The Xen Project community develops and maintains Xen Project as free and open-source software, subject to the requirements of the GNU General Public License (GPL), version 2. Xen Project is currently available for the IA-32, x86-64 and ARM instruction sets.

Source: Xen – Wikipedia

QEMU (short for Quick Emulator) is a free and open-source hosted hypervisor that performs hardware virtualization (not to be confused with hardware-assisted virtualization).

QEMU is a hosted virtual machine monitor: it emulates CPUs through dynamic binary translation and provides a set of device models, enabling it to run a variety of unmodified guest operating systems. It also can be used together with KVM in order to run virtual machines at near-native speed (requiring hardware virtualization extensions on x86 machines). QEMU can also do CPU emulation for user-level processes, allowing applications compiled for one architecture to run on another.

Source: QEMU – Wikipedia

Kernel-based Virtual Machine (KVM) is a virtualization infrastructure for the Linux kernel that turns it into a hypervisor. It was merged into the Linux kernel mainline in kernel version 2.6.20, which was released on February 5, 2007.^[1] KVM requires a processor with hardware virtualization extensions.^[2] KVM has also been ported to FreeBSD^[3] and illumos^[4] in the form of loadable kernel modules.

KVM originally supported x86 processors and has been ported to S/390,^[5] PowerPC,^[6] and IA-64. An ARM port was merged during the 3.9 kernel merge window.^[7]

A wide variety of guest operating systems work with KVM, including many flavours and versions of Linux, BSD, Solaris, Windows, Haiku, ReactOS, Plan 9, AROS Research Operating System^[8] and OS X.^[9] In addition, Android 2.2, GNU/Hurd^[10] (Debian K16), Minix 3.1.2a, Solaris 10 U3 and Darwin 8.0.1, together with other operating systems and some newer versions of these listed, are known to work with certain limitations.^[11]

Paravirtualization support for certain devices is available for Linux, OpenBSD,^[12] FreeBSD,^[13]NetBSD,^[14] Plan 9^[15] and Windows guests using the VirtIO^[16] API. This supports a paravirtual Ethernet card, a paravirtual disk I/O controller,^[17] a balloon device for adjusting guest memory usage, and a VGA graphics interface using SPICE or VMware drivers.

Source: Kernel-based Virtual Machine – Wikipedia

Source: Arduino Blog – Handy Arduino Uno R3 Pinout Diagram

This post aims to be a complete guide for the popular RF 433MHz Transmitter/Receiver module. with the Arduino

Source: RF 433MHz Transmitter/Receiver Module With Arduino | Random Nerd Tutorials

Kodi (previously known as XBMC), is a free, open source (GPL) multimedia player that originally ran on the first-generation Xbox, and now runs on Linux, OS X, Windows, Android and iOS. Kodi can be used to play/view the most popular video, audio, and picture formats, and many more lesser-known formats, including:

• Video – DVD-Video, VCD/SVCD, MPEG-1/2/4, DivX, XviD, Matroska
• Audio – MP3, AAC.
• Picture – JPG, GIF, PNG.

These can all be played directly from a CD/DVD, or from the hard-drive. Kodi can also play multimedia from a computer over a local network (LAN), or play media streams directly from the Internet. For more information, see the Kodi FAQ.

As of version 12, it can also be used to play and record live TV using a tuner, a backend server and a PVR plugin; more information about this can be found on the Kodi wiki.

Source: Kodi – ArchWiki

I want to be able to click links in Thunderbird emails and have them open in Chromium (package name chromium-browser). Instead, they open in Firefox.

I have tried the following:

1. xfce preferred applications (Chromium is not listed, so I had to hunt down the executable) — next time I run chromium, it complains that it is no longer the default browser.
2. Telling Chromium to set itself as the default browser. Thunderbird opens links in Firefox.
3. update-alternatives. It’s already listed as an alternative at the same priority as Firefox. The “open web browser” app menu item opens Chromium. Thunderbird opens links in Firefox.

I have looked through the entire preferences gui in Thunderbird (but not the advanced config editor yet) and seen nothing that mentions what browser to open links in.

Please note that this is not Google Chrome

Source: How do I make Thunderbird open links in Chromium? – Ask Ubuntu

Basic Wiring functions

Analog ADC

Interrupts

PWM

Pin Functions

UART pins

#define FUNC_U0CTS    4
#define FUNC_U0RTS    4
 
void user_init(void) {
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTCK_U, FUNC_U0CTS);//CONFIG MTCK PIN FUNC TO U0CTS
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, FUNC_U0RTS);//CONFIG MTDO PIN FUNC TO U0RTS
SET_PERI_REG_MASK(0x3ff00028 , BIT2);//SWAP PIN : U0TXD<==>U0RTS(MTDO) , U0RXD<==>U0CTS(MTCK)
......
}

LED Pin

Maximum Current