I am getting the following errors when I play a YouTube video:  Failed to load "libpepflashplayer.so" Freswrapper is a translation layer which needs PPAPI plugin backend. Ensure your system have "libpepflashplayer.so" available. Paths tried: /opt/google/chrome/PepperFlash/libpepflashplayer.so /opt/google/chrome-beta/PepperFlash/libpepflashplayer.so /opt/google/chrome-unstable/PepperFlash/libpepflashplayer.so /usr/lib/adobe-flashplugin/libpepflashplayer.so /usr/lib/pepperflashplugin-nonfree/libpepflashplayer.so /usr/lib/PepperFlash/libpepflashplayer.so /usr/lib64/PepperFlash/libpepflashplayer.so /usr/lib/chromium-browser/PepperFlash/libpepflashplayer.so /usr/lib64/chromium-browser/PepperFlash/libpepflashplayer.so /usr/lib/chromium/PepperFlash/libpepflashplayer.so /usr/lib64/chromium/PepperFlash/libpepflashplayer.so /opt/chromium/PepperFlash/libpepflashplayer.so /usr/lib/pepflashplugin-installer/libpepflashplayer.so   I am using Ubuntu 14.04 LTS 32-bit.  How do I correct the above errors?
I have had significant problems with watching flash video in 64-bit Ubuntu.  Does anyone know of a good way to get flash running on the platform?
make tail -f exit on a broken pipe I want to watch a file until a bit of text appears  I found this answer:   but when I tried it on ubuntu, it doesn't exit:  $ echo one &gt; test.txt $ echo two &gt;&gt; test.txt $ echo three &gt;&gt; test.txt $ echo four &gt;&gt; test.txt $ cat test.txt | sed '/w/ q' one two $   works as expected.  however when I try to tail the file  $ tail -f test.txt | sed '/w/ q' one two   it never exits.  tail does not stop even though the pipe is broken.  Does anybody know how to make tail exit when sed exits? I would like to convert a large LaTeX project (i.e. spanning multiple files) into plain text. The purpose is generation of statistics, so representing mathematics is not an issue. In fact, all mathematics is ideally ignored.  I have found  but could not get it to run. It seems unfinished, but is exactly what I am looking for otherwise. What's wrong with this digital signature scheme? With regards to user authentication...   The server sends Alice a randomly chosen number. Alice signs the number and sends the signature back to the server. The server checks the signature using Alice's public key. If it's valid, the server accepts her connection request.   Suppose that Alice uses the same private key to log in to the server and sign her emails. The authentication mechanism signs the bare challenge without hashing, while Alice signs the hash of the email message.   Apparently, the server can forge emails from Alice under this scheme? If so, how could this be prevented? Real UID, effective UID, and some systems even have a "saved UID". What's the purpose of all these, especially the last one? I am taking a course in Mathematical Methods for physicsPhysics (Junior Level).   We are working from   > Mathematical Methods for physicists, George B.Arfken .    I just need online resources covering ( Matrices, Determinants, Vector Analysis, Tensors and differential forms and Vector spaces...etc) to study and understand from. Simple question about the definition of Brownian motion I have a question concerning the definiton of Brownian motion. Usually (e.g. on Wikipdia) one demands a brownian motion $\lbrace B_t\rbrace_{t\in[0,\infty)}$ to satisfy the following condition:  $\forall 0\leq t_0&lt;t_1&lt;...&lt;t_m: B_{t_1}-B_{t_0},...,B_{t_m}-B_{t_{m-1}}$ are independent random variables.   But today I come across with formally another definition of Brownian motion! Instead of the above condition the book demands the following property:  $\forall t,h\geq 0$, $B_{t+h}-B_t$ is independent of $\lbrace B_u : 0\leq u\leq t \rbrace$.  Now I'm wondering whether both properties are indeed equivalent or not?! Hopefully someone can help me. I am trying to include a figure into LaTeX from a paper originally created using MS Word. I have already converted all the text/equations into LaTeX but I can't figure out how to get the figures over without re-drawing them using LaTeX code (which I do not want to do). The image is a plain box (like a tabular) one row by 7 columns with numbers inside each cell. Then I inserted arrows of varying length above and below the box (several short ones and one much longer).    I am trying to use the  package with the \includegraphics command.   I copied the figure (box and arrows) from my original article into a blank Word doc. The figure only takes up the first 4 or 5 lines of the blank document. I then selected/highlighted the image and printed the selection using 'PDFCreator'. This allowed me to save the image as a .eps file. I then copied and pasted the eps file into the folder where all my .tex files are saved.  When I compile the document using pdftexify there is a blank space where the image should be. In the console I get the following message when I compile the document:  [27] &lt;Fig3-eps-converted-to.pdf, id =105, 391.4625pt x 74.2774pt&gt; &lt;use Fig3-eps-converted-to.pdf&gt; Overfull \hbox 1.46153pt too wide) in paragraph at lines 511--516 []   My code looks like this:  \documentclass[12pt]{article}  \usepackage{graphicx} \usepackage{epstopdf} \begin{document}  %Text  \includegraphics{fig3.eps}  %text  \end{document}   I have read the sections on graphics in 'LaTeX: A Document Preparation System' and 'The Not So Short Introduction to LaTeX2e' but I still can't figure this out. Should I maybe use a PNG image since it is a pretty basic figure? Any advice on how to properly transfer images from a word doc to .eps format and/or how to get those .eps files into LaTeX properly would be a huge help. True Ubuntu on Chromebook ARM I am a little bit confused by early stopping and in particular by how it can be inserted inside a CV framework. As far as I understand, I can fix the optimal number of epochs (for NN, or number of trees for XGB) by early stopping, that is:   pick a validation set, train with increasing number of epochs until a predefined metric evaluated on the validation set starts worsening that is the optimal number of epochs to prevent overfitting   and that's fine. But then I would like to insert this early stopping framework inside a CV framework: Suppose I have a model with 10 hyperparameters I want to fix via CV. And suppose that there is an eleventh hyperparameter, the number of epochs. My feeling is that one can do like this:   create the K resampled folds, for each of which you have a training and validation set choose a suitable grid for your 10 hyperparameters for each point on the grid train your model in each fold with early stopping, that is use the validation set of the fold to keep track of the preferred metric and stop when it gets worse take the mean of the K validation metric choose the point of the grid (i.e. the set of hyperparameters) that gives the best metric   Questions:   What number of epochs should I choose as optimal? in each of the K folds I have, in general, a different number of stopping epochs.  seems to suggest they take the mean of the K stopping epochs. Is this right? Is it actually a "fair" practice to use the validation metric coming from the early stopping as a proxy of the out-of-sample metric? As  in section 3.4.5, maybe the best thing to do would be:     ...if you want to do early stopping, then in each fold you should take your training set and split it again, holding out a small early-stopping-set to guide the early stopping, and then evaluate the model on the validation set of that fold.   But this seems to me a really intricate process...   Unfortunately, I wasn't able to find references where this issue is presented in a clear and transparent form. Custom entity datetime field in calendar Compute Galois group of $\mathbb F_q/\mathbb F_p$ I have to compute Galois group of $\mathbb F_q/\mathbb F_p$ where $q=p^n$. I know already that $\mathbb F_q/\mathbb F_p$ is galois, so I don't need to prove it. Moreover, I know that \begin{align*}\sigma :\mathbb F_q&amp;\longrightarrow \mathbb F_q\\ x&amp;\longmapsto x^p\end{align*} is an automorphism that fix elements of $\mathbb F_p$ and thus $\sigma \in Gal(\mathbb F_q/\mathbb F_p)$.  Now, I know that if $k&lt;p^n$ then $\sigma ^k(x)=(x^{p})^k=x^{pk}\neq 1$ and thus $\sigma $ is of order $p^n$. Now if I can prove that $|Gal(\mathbb F_q/\mathbb F_p)|=p^n$, then $Gal(\mathbb F_q/\mathbb F_p)=\left&lt;\sigma \right&gt;$ and it would be finish, but I can't prove it since even $X^q-X$ split over $\mathbb F_q$, theis polynomial is not irreducible, and thus, I can't conclude. So how can I find an irreducible polynomial of degree $q$ that split over $\mathbb F_q$ ? How to find the working folder of a servlet based application in order to load resources Does this recursive sequence have a closed-form? Why don't we allow low reputation users to insert more than two images in their posts? I was searching for privileges one can get after a certain amount of reputation, and I ended up with this question in my mind: Why don't we allow users with low reputation to insert more than two images or links in their posts?  Is it good to make restrictions for them? Let's say someone is going to post a good question and he/she needs to insert three images to explain it properly; because this can't be done the question may become vague or incomplete to answer, and ultimately be flagged by others. Is this a rational decision for those users?  Yes, I believe that restrictions should be there to make a control over new users like for voting privileges but is it good to make restrictions on Questions and Answers?  Here is my question:  Is it decent to restrict new users in such a manner? Are there any reputable studies on spanking? How was this character poisoned in Warcraft? In Warcraft, towards the end of movie we observe the Guardian Medivh changing sides and starting to emit green light instead of blue. I might have missed that part or misunderstood but how exactly did he get poisoned? I have an odd error that I have been unable to find anything on this. I wanted to change the user comment with the following command.  $ sudo usermod -c "New Comment" user   This will work while logged onto a server but I want to automate it across 20+ servers. Usually I am able to use a list and loop through the servers and run a command but in this case I get a error.  $ for i in `cat servlist` ; do echo $i ; ssh $i sudo usermod -c "New Comment" user ; done  serv1 Usage: usermod [options] LOGIN  Options: lists usermod options  serv2 Usage: usermod [options] LOGIN  Options: lists usermod options . . .   When I run this loop it throws back an error like I am using the command incorrectly but it will run just fine on a single server.  Looking through the ssh man pages I did try -t and -t -t flags but those did not work.  I have successfully used perl -p -i -e within a similar loop to edit files.  Does anyone know a reason I am unable to loop this? Pending suggested edit message bug I just tried to edit a post on Stack Overflow but when I pressed the 'edit' button it showed me this message on a white page.    I know what the message means but I don't think it is supposed to show up in a white page. So, is this a bug or is it something else? DNS subdomain (child) NS records If we have example.com we would setup things something like this: $ORIGIN example.com. @  1D  IN  SOA ns1.example.com. hostmaster.example.com. (                   2002022401 ; serial                   3H ; refresh                   15 ; retry                   1w ; expire                   3h ; nxdomain ttl                  )           IN  NS     ns1.example.com.           IN  NS     ns2.example.com.  since in the parent zone .com. there is already NS record for the example.com. child zone and A glue record for the ns1.example.com. for what purpose do we state NS records again in the child zone? and also, do we need to state A record for the name servers in the child zone itself? Does increasing voltage increase the torque of a brushless motor? 1.) I have a brushless motor with testing data at 12V. I want to know if I increase the voltage supply, will this increase the torque?   In my research I keep seeing "current controls torque, and voltage controls speed." But that doesn't seem quite right. Let's say I have a theoretical electrically powered unicycle that is weighted. With a 5V source and 2A, the motor can't move the unicycle. But now I increase the voltage to 10V, and I believe current will also increase by x2 if resistance is constant (V = IR). So now the torque increases and the unicycle can move itself. It that a reasonable sequence of events? Can I say that increasing voltage increases torque?   2.) A similar question: if P = VI = tau*omega, then P/omega = tau, so:  2*(P/omega) = 2*tau, which means increasing power will increase torque, correct? And since P = VI, increasing V will increase P, which will in turn increase torque. Is this accurate at all?