First of all, I want to let you know that I am a complete Ubuntu (and Linux in general) beginner, basically what you can call a newbie.  So last time I wanted to install Ubuntu 16.10 in a dual boot with Windows 10. I downloaded the .iso and mounted it on a Flash drive using LiLi. Everything went pretty well until I booted on the USB : The mouse seemed to be moving (I could notice that by seeing some buttons getting highlighted as I moved the mouse) but the mouse cursor wouldn't leave the top-left corner of my screen !  Fun thing : When I tried to move the mouse to my secondary screen, the cursor just got blocked in the top-left corner... of the secondary screen !  I thought that maybe it was just an issue with the installer, so what I did was that I kept installing the OS and everthing went pretty good. When I booted, I could see the GRUB interface and both Windows and Ubuntu were accessible. Except that the issue was still here.  I've tried several things that I saw on this forum in order to fix this and I did get a pretty bizarre result. When I installed the nvidia-current package, a lot of stuff changed within my Ubuntu : First, my secondary screen wasn't usable anymore, so I had to deal with only one screen (which didn't really bother me for now). Then, the resolution was really downgraded but it did fix my cursor problem ! The thing is that while solving one problem, it created another. I was stuck in the login screen, meaning that when I tried to log in, a kind of terminal (I guess ?) appeared in a flash and brought me back to the login screen.   I tried installing Ubuntu Gnome (as I prefer the Gnome environment) but got the same results.  Any ideas ?
I just installed Ubuntu 16.10 on my desktop and have a USB deathadder. The problem is I can't see where the cursor actually is because it appears only in the top left of my screen. The mouse still moves but the cursor graphic doesn't follow
We have been using this result without proof in my class, but I don't know how to prove it. Could someone point me in the right direction?  $$|1-e^{i\theta}|\le|\theta|$$  I believe this is true for all $\theta\in\mathbb{R}$. It is easy to show that the left side is bounded by 2 (triangle inequality), but I'm stuck otherwise. How do you pull first 100 characters of a string in PHP I am looking for a way to pull the first 100 characters from a string variable to put in another variable for printing.    Is there a function that can do this easily?  For example:  $string1 = "I am looking for a way to pull the first 100 characters from a string variable to put in another variable for printing."; $string2 = 100charfunction($string1); print $string2   To get:  I am looking for a way to pull the first 100 characters from a string vari Call dynamic_sidebar but include/exclude named widgets? Is it possible to include or exclude specific named widgets that are assigned to a named dynamic_sidebar call?  For example, if I've registered a sidebar named "my_sidebar" and the user had placed a "Links" widget into it, I want to be able to include or exclude it based on a custom setting in my theme options panel.  Is this possible?  Any insights much appreciated. Calculating roundness/compactness of polygon? I am trying to find ways to quantitatively describe the shapes of various polygons. For my project, these polygons represent lakes, rivers, lagoons, and parks. So they can be almost any shape. One easy metric is to calculate perimeter vs. area, which is at best an only slightly useful metric. But I would also very much like to be able to say something about the 'roundness' of a polygon. Or how 'compact' the shape is on a map.  The only way I can think of doing this easily is to calculate the area of each polygon in relation to a bounding box for that polygon (which I already have). But this seems like a poor solution.  So now I am thinking of something more like this - take the centroid of the polygon, add on a series of buffers of increasing areas (say 50%, 100%, 150%), then compare how much overlap there is between each buffer and the original polygon. A perfect circle will have perfect overlap at 100%, and I can use the 50% and 150% buffers to judge how much and in what way each polygon differs.  But even that feels cumbersome, and like a poor workaround for what somebody else has probably already figured out far better.  For reference, at a minimum I will need to be able to look at the resulting indices for the shape of various polygons, and be able to make an educated guess as to their source (River? Reservoir with dendritic shape? Lake/Lagoon? Park?) Let $U,W$ be subspaces of a vector space $V$. Show that   $$\dim(U)+\dim(W)=\dim(U+W)+\dim(U\cap W)$$   Hint: Show that the map given by $L:U×W\to V$ given by $L(u,w)=u-w$ is linear.   I can show that $L:U×W\to V$ given by $L(u,w)=u-w$ is a linear map. I also know that the dimension of $U×W$ is $\dim(U)+\dim(W)$. What do I do next? Any hints? Do shots fired before the match starts count towards your end-of-game statistics? In Overwatch, there is short countdown for a few minutes before the match begins. During this time, the defending team is allowed to roam the map to set up their defenses, while the attacking team sits in a small lobby until the game starts and the doors open. (Or in KotH-type maps, both teams wait in a lobby.)  While players wait, it's not uncommon for them to fire off random shots, especially since a lot of the environment is destructable (it's entertaining to watch plush onions sail through the air in the arcade).   Do shots fired before the match starts count towards accuracy statistics at the end of the game? How do I enumerate the properties of a JavaScript object?  I actually want to list all the defined variables and their values, but I've learned that defining a variable actually creates a property of the window object. How to access blocked sites? I am in Pakistan and  is blocked here. I want to take the Lecture videos from YouTube. In Windows, I was using  to bypass the proxy.   But now, using Ubuntu, I don't know how to bypass the proxy. I found some where that i can bypass the proxy by using putty software. Can you guide me how can I bypass proxy by that? I tried, but I was not able to do so. Kindly tell me some easy method to bypass proxy. I don't want to used websites like accesstoblockedsites.com. Auto-run scripts security options How to host my existing website with Google Drive Google has given me 15GB of storage. Can I host my own website having my own domain? I am looking for a exact derivation of a relation between redshift $z$ and distance $d$.  What I know is the definition $$z=\frac{\lambda_{\text{observed}}}{\lambda_{\text{unshifted}}}-1=\sqrt{\frac{1+\frac{v}{c}}{1-\frac{v}{c}}}-1$$ and that the Hubble constant $H$ as a function of $z$ is: $$H^2=H_0^2\left(\Omega_m\left(1+z\right)^3+\Omega_{\Lambda}\right)$$  How can I use this to derive the distance? If I have a 18-55mm lens, is there a point in buying a 35mm prime lens? I have the Nikon kit lens that came with a D5100 — the kit lens is  . I was thinking of getting a fast lens and I am looking to buy the .  Should I consider 35mm or instead buy a 55-200mm for better range? Is "aren't I" correct grammar? HSA - Continue to Invest? There was a foolish (in my opinion) question asked on Scifi.SE       James bond keeps returning with a different face, albeit usually a similar one, and often operates with high-tech gadgetry that seem to be on par with the Doctor's sonic screw driver.   In my opinion each new actor represents a reboot of the franchise using the new face, not a continuation of the story.   Is there any continuity between versions of James Bond which change actors? I'm not talking about characters like M or Q, I'm talking about events or past advisories being referenced in a different Bond movie where the main actor was someone else. Let $f:(0,\infty) \to R$ be differentiable. Suppose that $\lim_{x\to\infty}(f(x)+f'(x))=L$. Show that $\lim_{x\to\infty} f(x) = L$ and $\lim_{x\to\infty} f'(x) = 0$. (Hint: Write $f(x) = e^xf(x)/e^x$ and use l’Hopital’s Rule.)    My working for $\lim_{x\to\infty}f'(x)=0$:  For $\lim_{x\to\infty}f'(x) = 0$, I let $f(x) = e^xf(x)/e^x$ and applied quotient rule which then cancels off $e^{2x}$ and I'm left with $\lim_{x\to\infty}(f(x)+f'(x)-f(x))$. Can I then equate this with $\lim_{x\to\infty} \left(f(x)+f'(x)\right) - \lim_{x\to\infty}f(x)$ which then gives $L-L=0$? Is this step correct? Restore SQL Server 2012 backup to a SQL Server 2008 database? I am using Ubuntu 17.10 on my desktop PC, I've been monitoring network traffic with Etherape. I noticed HTTP requests from my PC(casa hostname) to googleusercontent.com (104.198.143.177). So I used lsof and ss to 'identify' process behind these requests.    Using lsof -i:   NetworkMa  778            root   20u  IPv4 546772      0t0  TCP casa:53671-&gt;177.143.198.104.bc.googleusercontent.com:http (SYN_SENT) NetworkMa  778            root   20u  IPv4 546772      0t0  TCP casa:53671-&gt;177.143.198.104.bc.googleusercontent.com:http (ESTABLISHED)   Using ss -rep dst 104.198.143.177:    tcp    SYN-SENT   0      1      casa%enp4s0:53671    177.143.198.104.bc.googleusercontent.com:http  users:(("NetworkManager",pid=778,fd=20)) timer:(on,964ms,0) ino:546772 sk:6df &lt;-&gt; tcp    ESTAB      0      87     casa%enp4s0:53671    177.143.198.104.bc.googleusercontent.com:http  users:(("NetworkManager",pid=778,fd=20)) timer:(on,300ms,0) ino:546772 sk:6df &lt;-&gt;   It seems NetworkManager (pid 778) is sending requests to googleusercontent, and it happens every 5 minutes exactly.   I have to say, no applications were launched at the moment, no background process, no network activities,no online account and it was a 'Ubuntu fresh install'. So why NM would sent requests to googleusercontent? How to create a bootable USB with multiple ISO images in it What I want is to create a bootable pen drive that shows GRUB menu and I can select any of the several bootable systems from there to install/run. I have several ISO images that I want to install in the USB like Ubuntu, Fedora, System Rescue CD, Windows XP and Windows 7 (The windows versions are optional, mostly am looking for a multi installer for Linux distros, specially Ubuntu version)  The default Startup Disk Creator only works with Linux Images and only 1 at a time (At least for the mean time. If it allows more systems and multiple ISOs it would be awesome)  What method exists that I can use step by step to create a bootable USB Drive with multiple images than can be booted from the USB and selected from GRUB. It must support Windows Images and Linux Images.  Alternatively, is there also a way to have multiple versions of the Ubuntu installation ISO on same USB Drive, such as, when booting from it, I get to choose what Ubuntu version and architecture to install, for example:     BOOT MENU   Ubuntu 12.04 32 Bit   Ubuntu 12.04 64 Bit   Ubuntu 12.10 32 Bit   Ubuntu 12.10 64 Bit   UPDATE: Wanted to add that the English version for the post mentioned by daithib8 is here: How to make the term "page" show in the Glossary list?