I have a working laptop with Ubuntu 18 LTS. I bought a newer Asus VivoBookX with Windows 10, for its greater disk capacity, planning to install Ubuntu 20LTS. For various reasons, that failed, and now it's not running either Windows or Ubuntu. I hope to re-instate the Windows, and start again from there. I have downloaded a Win10 ISO onto my working machine, and have a USB with 16GB emptied and ready, but am stuck on how to create the bootable drive. Balena Etcher spotted that it was Windows, doesn't want to handle it and recommends Rufus. For some reason I can't get Rufus to open on this machine - does it not run with Ubuntu? I'm not the first to ask a version of this question, but other replies I've seen here are very out of date, with comments that things have changed. I can follow basic instructions in small steps, but have very limited technical understanding! Thanks for any help.
I'd like to create a Windows bootable USB stick, but I don't have a Windows machine with me at the moment to do so. How could I achieve the same using Ubuntu?
How to show that this group presentation is isomorphic to dihedral group? The group with the presentation $\langle a, b \mid a^2, b^2, (ab)^4\rangle$ seems like a dihedral group of order 8. But I fail to explain why. Could anyone show me how to prove it? Update a field without changing the node I need to change a field in a node without altering the 'changed' timestamp. I know this was possible in Drupal 7 using field_attach_update(), but that has been removed since then.  I could use an update query and change the field directly in the database, but I was wondering if there is a better way (or a replacement for field_attach_update()). Compress a folder with tar? I'm trying to compress a folder (/var/www/) to ~/www_backups/$time.tar where $time is the current date.  This is what I have:  cd /var/www &amp;&amp; sudo tar -czf ~/www_backups $time"   I am completely lost and I've been at this for hours now. Not sure if -czf is correct. I simply want to copy all of the content in /var/www into a $time.tar file, and I want to maintain the file permissions for all of the files. Can anyone help me out? Removing unwanted appearance of underlying mesh Reflection to Identify Extension Methods A customer running Windows 7 Home must have reserved or okayed the Windows 10 upgrade because I am seeing daily messages that the upgrade is failing to install.   This customer is not ready for Windows 10 so it's good that the install is failing. But how to make it stop trying?  Once permission is granted for the upgrade, how do I revoke that permission so it stops attempting to upgrade?  I ran the Windows Update troubleshooter to clear out updates, and I uninstalled and hid KB3035583, but it is still trying to upgrade. In Task Manager, there is no GWX.EXE process.  Event log failure message:  Log Name:      System Source:        Microsoft-Windows-WindowsUpdateClient Date:          8/5/2015 1:28:58 AM Event ID:      20 Task Category: Windows Update Agent Level:         Error Keywords:      Failure,Installation User:          SYSTEM Description:   Installation Failure: Windows failed to install the following update with                 error 0x80240020: Upgrade to Windows 10 Home.   Relevant lines from WindowsUpdate.log:  2015-08-05  01:28:57:885    1068    6698    Agent   ************* 2015-08-05  01:28:57:885    1068    6698    Agent   ** START **  Agent: Installing updates [CallerId = AutomaticUpdates] 2015-08-05  01:28:57:885    1068    6698    Agent   ********* 2015-08-05  01:28:57:885    1068    6698    Agent     * Updates to install = 1 2015-08-05  01:28:57:885    1068    6698    Agent     *   Title = Upgrade to Windows 10 Home 2015-08-05  01:28:57:885    1068    6698    Agent     *   UpdateId = {27E79986-1150-4342-BDD2-76DF82C768D5}.201 2015-08-05  01:28:57:885    1068    6698    Agent     *     Bundles 1 updates: 2015-08-05  01:28:57:885    1068    6698    Agent     *       {FCD6621E-F5D4-4A95-AD43-28F0C58DD2F3}.201 2015-08-05  01:28:58:181    1068    6698    DnldMgr Preparing update for install, updateId = {FCD6621E-F5D4-4A95-AD43-28F0C58DD2F3}.201. 2015-08-05  01:28:58:181    27280   6f84    Misc    ===========  Logging initialized (build: 7.6.7601.18917, tz: -0700)  =========== 2015-08-05  01:28:58:181    27280   6f84    Misc      = Process: C:\Windows\system32\wuauclt.exe 2015-08-05  01:28:58:181    27280   6f84    Misc      = Module: C:\Windows\system32\wuaueng.dll 2015-08-05  01:28:58:181    27280   6f84    Handler ::::::::::::: 2015-08-05  01:28:58:181    27280   6f84    Handler :: START ::  Handler: Windows Setup Install 2015-08-05  01:28:58:181    27280   6f84    Handler ::::::::: 2015-08-05  01:28:58:181    27280   6f84    Handler   : Updates to install = 1 2015-08-05  01:28:58:181    1068    5ecc    AU  &gt;&gt;##  RESUMED  ## AU: Installing update [UpdateId = {27E79986-1150-4342-BDD2-76DF82C768D5}] 2015-08-05  01:28:58:181    1068    5ecc    AU    # WARNING: Install failed, error = 0x80240020 / 0x00000000 2015-08-05  01:28:58:181    27280   6f84    Handler   : WARNING: Exit code = 0x80240020 2015-08-05  01:28:58:181    1068    5ecc    AU  Write OSUpgradeState =14 with OSUpgradephase =2 2015-08-05  01:28:58:181    27280   6f84    Handler ::::::::: 2015-08-05  01:28:58:181    27280   6f84    Handler ::  END  ::  Handler: Windows Setup Install 2015-08-05  01:28:58:181    27280   6f84    Handler ::::::::::::: How to calculate overlap between empirical probability densities? I'm looking for a method to calculate the area of overlap between two kernel density estimates in R, as a measure of similarity between two samples. To clarify, in the following example, I would need to quantify the area of the purplish overlapping region:  library(ggplot2) set.seed(1234) d &lt;- data.frame(variable=c(rep("a", 50), rep("b", 30)), value=c(rnorm(50), runif(30, 0, 3))) ggplot(d, aes(value, fill=variable)) + geom_density(alpha=.4, color=NA)     A similar question was discussed , the difference being that I need to do this for arbitrary empirical data rather than predefined normal distributions. The overlap package addresses this question, but apparently only for timestamp data, which doesn't work for me. The Bray-Curtis index (as implemented in vegan package's vegdist(method="bray") function) also seems relevant but again for somewhat different data.  I'm interested in both the theoretical approach and the R functions I might employ to implement it. Proving the limit of a function of a sequence is equal to the function of the limit of that sequence Suppose $f$ is a continuous function at $x = c$ in $[a,b]$.  Prove that for any sequence ${x_n}$ in $[a,b]$ converting to $c$, the sequence $\{f(x_n)\}$ converges to $f(c)$.  That is, $$ \lim_{n\to\infty}f(x_n)= f\left(\lim_{n\to\infty}x_n\right)$$    This proof seems simple but there are a few things that I need to know first. If $\{x_n\}$ converges to $c$, is it sufficient to substitute $c$ in for $\lim_{n\to\infty}x_n$?  Also needing some guidance on the structure of this proof.  Thanks! I have a list of requirements for a program, but I don't know what program meets these criteria. That's about general-purpose software, for example, not a programming IDE or statistical workbench, questions about which would certainly go to respective sites.  Is this question appropriate on Stack Overflow? Where should I ask about it? On Super User or elsewhere? Is the Nintendo 3DS region-locked? I am thinking of buying a 3DS when the price drop comes into place in America, however I live in Australia. Will Australian 3DS games work on a North American 3DS? I've often heard that Einstein shattered the notion of absolute motion (i.e. all things move relative to one another) and that he established the speed of light as being absolute. That sounds paradoxical to me; I cannot understand how the two concepts can be reconciled.  Before going further, I'd like to say: 1) Over the years, I've seen many layman's explanations on these topics (including the nice YouTube video by Vsauce, ). I understand everything that's said (or, at least, I think I do). Just nothing I've found seems to address this apparent contradiction. 2) More recently, I've tried to find the answer on my own. That includes searching the posts on this site. Some come close (), but nothing I've been able to find seems address specifically what I'm asking.  Back to the question: Relativity shows us that there is no universal frame of reference by which to judge motion, so object A might be reckoned as moving at 10&nbsp;m/s relative to object B or as stationary relative to object C. This is fine for me. I can grasp that the universe has no intrinsic coordinate system, that we only think that way on Earth because we have the ground to move over.  Then there's the speed of light (in a vacuum). The speed of light is the ultimate "speed limit," it's often said. But if there is no universal frame of reference, how can there be any such speed? The very idea only make sense if there is a universal frame.   If one object is moving (uniformly) at 60%&nbsp;c and another object is also moving at 60%&nbsp;c, but in the exact opposite direct, then from the perspective of either one (if they could still see each other) the other would appear to violate that speed limit. All these spacetime bending consequences used to explain why nothing can move past this speed only seems to enshrine the concept that there is some ultimate speed standard. If there is only relative speed, then the concept of light having a specific speed in the vacuum should be a nonsensical one since it having speed (x m/s) would only make sense when measured against some other body.   Since I was very young, it has always sounded to me like motion is only mostly relative, that until you get close to the speed of light, the effects of an absolute frame of reference are negligible. Perhaps that there is an actual fabric of space which everything moves relative to, which is why there is something to expand between galaxies (faster than light can propagate) in the metric expansion of space. Growing up, I always thought this would just start makes sense with time. Now I'm up to a first year (college) level in physics, I even know basic calculus, yet I'm still hopelessly confused.  EDIT:  Thank you to whoever suggested this may be a duplicate of . It and others are very much related and at least partially answer my question. Unfortunately, explaining that distances become shorter and time becomes slower as a way to stop you from exceeding the speed of light does not explain how that speed is not an absolute.  By my reckoning, if all speed is relative, then no matter how fast you go light should always race away from you at the same apparent speed. I.e. there should be no speed limit. For there to be a speed which you cannot exceed or you would catch up (and make time irrelevant) requires the very concept of some external speed by which light can travel and nothing else can reach - thus my logical paradox continues unabated. How to correctly label an included PDF? I have this:  \label{appendix:b} \includepdf[scale=0.8,pages=1,pagecommand=\chapter{interview}]{interview/interview} \includepdf[scale=0.8,pages=2-,pagecommand={}]{interview/interview} \label{appendix:bslut}   And I'm calling it with cleveref:  \cpagerefrange{appendix:b}{appendix:bslut}   The problem is that I get the wrong page number for the last page -- it adds a page. What should be "pages 1-5" is instead "pages 1-6". I have Googled this like a madman, and I can't figure out what to do. I hope some of the superstars here can help! I have cleveref after hyperref, as recommended...  EDIT: As requested, I tried to make an MWE, but for some reason it gives me:  LaTeX Warning: Reference `appendix:bslut' on page 1 undefined on input line 7.   Here it is, though. "multipage" should be a PDF spanning several pages.  \documentclass{memoir} \usepackage{pdfpages} \usepackage{hyperref} \usepackage{cleveref} \begin{document} \chapter{Foo} Foo\cpagerefrange{appendix:b}{appendix:bslut}.  \chapter{Bar} \label{appendix:b} \includepdf[scale=0.8,pages=1,pagecommand=\chapter{Multipage}]{multipage} \includepdf[scale=0.8,pages=2-,pagecommand={}]{multipage} \label{appendix:bslut}  \end{document} Mboxcox, interpreting difficult regressions Mboxcox in Stata suggests transforming my variables using a power of 0.1 for the independent variable, and 0.4 for the dependent variable.  I have run the model, and it fixes problems associated with the assumptions of OLS. But certainly, it complicates matters in terms of interpretations.  Please outline possible interpretations and solutions.  Dependent variable is in millions of dollars, and independent variables are number of years.  and a number of dummies which do not require transformation. What is the proof that a force applied on a rigid body will cause it to rotate around its center of mass? Evaluate the integral $$\int_0^{\pi/2} \frac{1}{1+\tan^\alpha{x}}\,\mathrm{d}x$$ When I set up a site in multiple languages, how should I set up my URLs for search engines and usability?  Let's say my site is www.example.com, and I'm translating into French and Spanish. What is best for usability and SEO?  Directory option:  http://www.example.com/sample.html http://www.example.com/fr/sample.html http://www.example.com/es/sample.html   Subdomain option:  http://www.example.com/sample.html http://fr.example.com/sample.html http://es.example.com/sample.html   Filename option:  http://www.example.com/sample.html http://www.example.com/sample.fr.html http://www.example.com/sample.es.html   Accept-Language header:  Or should I simply parse the  header and generate content server-side to suit that header?  Is there another way to do this? If the different language versions don't have different urls, what do I do about the search engines?    UPDATE 2011-12-06  Google has new recommendations for meta tags for explicitly pointing to other language content: .  UPDATE 2012-05-25  Related but not precisely:   UPDATE 2013-06-12  includes discussion of several URL schemes directly relevant to the question. How to show textures in the 3D View editor? I'm new to Delphi, and I've been running some tests to see what object variables and stack variables are initialized to by default:  TInstanceVariables = class   fBoolean: boolean; // always starts off as false   fInteger: integer; // always starts off as zero   fObject: TObject; // always starts off as nil end;   This is the behaviour I'm used to from other languages, but I'm wondering if it's safe to rely on it in Delphi?  For example, I'm wondering if it might depend on a compiler setting, or perhaps work differently on different machines.  Is it normal to rely on default initialized values for objects, or do you explicitly set all instance variables in the constructor?  As for stack (procedure-level) variables, my tests are showing that unitialized booleans are true, unitialized integers are 2129993264, and uninialized objects are just invalid pointers (i.e. not nil).  I'm guessing the norm is to always set procedure-level variables before accessing them? Edit Mode Transparent Objects This is a follow-up to .  Suppose you want to denote vectors by upright bold letters; then \mathbf{u} works fine, except that if it's a Greek letter you have to use \boldsymbol{\omega} instead.  Question: Is it possible to define a generic vector command in LaTeX which automatically chooses between \mathbf and \boldsymbol, so that one can write just \vect{u} and \vect{\omega} without having to treat the Greek symbols specially by hand?  (Just to be clear: \newcommand{\vect}[1]{\boldsymbol{#1}} is no good in this situation, since \boldsymbol{u} gives bold italic instead of roman.)