How to reinstall Ubuntu16.04 I have dual booted my system Windows 10 and Ubuntu 16.04. Ubuntu 16.04 is installed on a different partition of my disk. I want to reinstall the same Ubuntu in the same partition. I want to have only Ubuntu 16.04 on my system not its data that I have stored in it.
Reinstalling Ubuntu with a dual boot I was experiencing problems with Ubuntu Desktop like missing and broken system packages, missing Unity package and other problems. So I decided that the best solution (without touching Windows files) is just to reinstall Ubuntu.  I looked everywhere and found the way but got confused as some say that I supposed to choose "Erase Ubuntu and reinstall", others say that I supposed to choose "Something else" and just select it manually while installation. I thought the first option would be better and just safer as I don’t want any of Windows files to be touched but it says that it has a bug that erases all other partitions...   Current Ubuntu version: 17.04 desktop 32bit will be replaced with 16.04.0 desktop 32bit (as 32bit 17.04 version is no longer available)   What’s the safer option to choose? And if the second one is, how to make sure it’s Ubuntu partition?
I'd like to ask for help with a task that I've been given.  The task goes like this: In a poker game (52 cards), 5 players are given 5 cards each. What is the probability that both the first and the third player will get a full-house?  It's apparent that the probability of the first player getting a full house is  $\frac{\binom{13}{1} * \binom{4}{3} * \binom{12}{1} * \binom{4}{2}}{\binom{52}{5}}$  Then the second player gets 5 random cards, so $\frac{\binom{13}{1} * \binom{4}{3} * \binom{12}{1} * \binom{4}{2}}{\binom{52}{5}} * \binom{47}{5}$  Now the third player is supposed to get a full house, I'm assuming it should look like this: $\frac{\binom{13}{1} * \binom{4}{3} * \binom{12}{1} * \binom{4}{2}}{\binom{52}{5}} * \binom{47}{5} * \frac{\binom{13}{1} * \binom{4}{3} * \binom{12}{1} * \binom{4}{2}}{\binom{42}{5}}$  The fourth and the fifth player both receive 5 random cards, so the final equation should be:$\frac{\binom{13}{1} * \binom{4}{3} * \binom{12}{1} * \binom{4}{2}}{\binom{52}{5}} * \binom{47}{5} * \frac{\binom{13}{1} * \binom{4}{3} * \binom{12}{1} * \binom{4}{2}}{\binom{42}{5}} * \binom{37}{5}* \binom{32}{5}$  This is how I would solve the task, but I'm not sure that my solution for the third player is correct. Could anyone more experienced than me have a look at my solution?  Also I'm sorry if there is a solution for this type of task on this site, I tried looking for it and I found a lot of poker probability questions, most of them were however focused on only one player and not multiple players, which is my case. Techniques for modeling a network of blood vessels If you've ever seen anything like Body Worlds or the Bodies: The Exhibition you'll know how they dissect individual organ systems and put them on display with a technique known as . For instance, plastic can be pumped through the circulatory system such that when it hardens, acid can be used to dissolve the rest leaving the underlying network of blood vessels underneath.    I'm looking forward to modeling something as intricate as this, but my first attempts have failed. The initial idea was to generate a tree structure with the Sapling Tree add-on. Then I could do a Boolean modifier with my model, and touch up the end points individually by extruding to follow the contours of the model's surface. However, the Boolean modifier fails in this example.  Do I have to code this procedurally with a Python script or is there some other method I should try first? How to find out why "context is incorrect"? I have been trying to write my first addon for Blender over the last couple of days. One error I came across quite often is the context is incorrect error for an operation of bpy.ops.  I learned that one can ask the poll function of an operator if the context is correct, but this does not tell why the context is correct/incorrect. What would be the best way to figure that out? Only way I could think of is to look into the code of the poll function. If that is the best way, what is the fastest way to find the appropriate piece of code? Proteins are synthesized on ribosomes from mRNA copies of regions of the DNA. But ribosomes themselves are made up of proteins (and RNA). So how could the first ribosomes have arisen? Was there previously some other way of making proteins other than by ribosomes and mRNA? Transparent textured planes produce black artifacts $C^2 $embedded in holder space? I have a question on Holder space.Is the space $C^2(\mathbb{R}^n)$ embedded in $C^{1,\alpha}(\mathbb{R}^n)$? I think in the bounded domain case, this should be true. But what if in the case where the domain is not bounded? Thanks for any hint! Why do shadows from the sun join each other when near enough? I was laying on my bed, reading a book when the sun shone through the windows on my left. I happened to look at the wall on my right and noticed this very strange effect. The shadow of my elbow, when near the pages of the book, joined up with the shadow of the book even though I wasn't physically touching it.   I have posted :The video seems to be the wrong way up, but you still get the idea of what is happening.  What is causing this? Some sort of optical illusion where the light gets bent?  Coincidentally, I have been wondering about a similar effect recently where if you focus your eye on a nearby object, say, your finger, objects behind it in the distance seem to get curved/distorted around the edge of your finger. It seems awfully related...  EDIT: I could see the bulge with my bare eyes to the same extent as in the video! The room was well light and the wall was indeed quite bright. Package for drawing RDF graphs Is there some package to draw nice RDF graphs, such as the one below (taken from )?  Can such a graph (with the same style) be produced in TikZ? How to create dummy webcam? I would like to join some videoconference, but I don't own a webcam and the conference software requires one.  So my question is, can I create a dummy one? I don't care what the cam will cast, I just need to appear to have one. How to compute PCA scores from eigendecomposition of the covariance matrix? Given a data matrix $\mathbf X$ of $12 \times 7$ size with samples in rows and variables in columns, I have calculated centered data $\mathbf X_c$ by subtracting column means, and then computed covariance matrix as $\frac{1}{N-1} \mathbf X_c^\top \mathbf X_c$.  The dimensions of this covariance matrix are $7 \times 7$. After that I have calculated the eigenvalue decomposition, obtaining eigenvector matrix $\mathbf V$ with eigenvectors in columns.  Now I want to know about projections (i.e. principal component scores in PCA): is it $\mathbf{V}^\top \mathbf{X}_c$ or $\mathbf{X}_c \mathbf{V}$?  mean_matrix = X - repmat(mean(X),size(X,1),1); covariance = (transpose(mean_matrix) * mean_matrix)/(12-1);  [V,D] = eig(covariance); [e,i] = sort(diag(D), 'descend'); V_sorted = V(:,i); Here's my proof in my own words, does it stack up?   Showing $A$ is complete implies $A$ is closed. Let $(x_n)$ be a convergent sequence in $A$. $A$ is complete $\implies (x_n) \to p \in A$. Hence $A$ is closed. Showing $A$ is closed $\implies$ $A$ is complete. Let $(x_n)$ be a convergent sequence in $A$. $A$ is closed $\implies (x_n) \to p \in A$. As every convergent sequence is a Cauchy sequence, $(x_n)$ is a Cauchy sequence in $A$ that converges to $p \in A$ and hence $A$ is complete.   That sound ok?  As an aside, it seems to me that the definition of completeness and closed are basically identical, why are there two definitions for the same thing? Am I missing something here? Why do I get a segmentation fault when writing to a "char *s" initialized with a string literal, but not "char s[]"? Will I miss anything by watching Dragon Ball Z Kai instead of the other series? I've read that Dragon Ball Z Kai is an HD remaster and recut of Dragon Ball and Dragon Ball Z. However, Kai has  while Dragon Ball has  and Z has .  If I watch only Dragon Ball Z Kai, do I miss anything I would get by watching the other two series? And is anything censored in Kai that is not censored in the others? Is "Michael here" correct? Windows 8 upgrade Recovery Disk I have upgraded to Windows 8 from Win 7. I want to create a recovery disk for Windows 8, just in case something goes wrong. I didn't find the option of creating it from the control panel.  How do I create a Recovery CD/DVD? What kind of construct is 'would that that were all'? There is a place in Bram Stoker’s Dracula where I can’t quite parse the grammar:     8 May. — I began to fear as I wrote in this book that I was getting too   diffuse. But now I am glad that I went into detail from the first, for   there is something so strange about this place and all in it that I cannot   but feel uneasy. I wish I were safe out of it, or that I had never come. It   may be that this strange night existence is telling on me, but would that   that were all!   I understand the meaning of the text in bold (it’s equivalent to if only that was all!), but I don’t understand the grammar being used. What kind of construct is this? How can I position my div at the bottom of its container? Given the following HTML:   &lt;div id="container"&gt;   &lt;!-- Other elements here --&gt;   &lt;div id="copyright"&gt;     Copyright Foo web designs   &lt;/div&gt; &lt;/div&gt;    I would like #copyright to stick to the bottom of #container. Can I achieve this without using absolute positioning? How does vendor restocking work in Fallout 4? Calculate the last digit of $3^{347}$ I think i know how to solve it but is that the best way? Is there a better way (using number theory). What i do is: knowing that  1st power last digit: 3 2nd power last digit: 9 3rd power last digit: 7 4rh power last digit: 1 5th power last digit: 3    $3^{347} = 3^{5\cdot69+2} = (3^5)^{69} \cdot3^2 = 3\cdot3^2=3^3=27 $ so the result is $7$. After my suspension period, my reputation was not returned On Stack Overflow, I have a suspension period of 7 days which ends today. But my actual reputation has not been returned to me as one of the moderators said it would. I have a message like this by @Andrew Barber:     Once your suspension period is over, you will be returned to your   correct reputation level, minus the votes from the accounts which have   been deleted. At that time, you are more than welcome to return, and   continue contributing your knowledge, and gaining legitimate   reputation points. Just please keep our rules in mind when you do.      Regards      Andrew Barber, Stack Overflow moderator   Can any moderator here help me or tell me what the rules are of getting back my reputation?  How can I get the attention of a moderator so that they can resolve my problem?