Would you please tell me how to install Windows games on Ubuntu? I really need it.
Can .exe and .msi files (Windows software) be installed in Ubuntu?
Markdown does not allow for bold italic, then bold, then bold italic I am trying in one of my posts to do this:  ***how many*** **and** ***where***   Which for some reason comes out like this:    Why is that happening?  Shouldn't the middle word be bold?  Is this  for markdown or is it (as I assume) a ? \overline outside of math mode If I want to draw an overline over some text, not an equation, how can I do it? \overline seems to only work in math mode, and when used outside of math mode, it automatically says "Missing $ inserted". The various modern revolutions in physics, in psychology, in politics, even in literary style, have not escaped his intelligent notice, but they can scarcely be said to have influenced him deeply.    Could you please explain the following?  They can scarcely be said to have influenced him deeply.  Or, I can not understand such a structure like the following:  In contrast, prices set by a central planner are necessarily arbitrary, since there is no standard against which they can be said to be correct or incorrect. d'oh! Energy-momentum tensor transformation I've been trying to find how the energy-momentum tensor changes if we add a total derivative to the lagrangian: $$L\to L+\mathrm d_\mu X^\mu.\tag{1}$$   From the answer key:  $$T^{\mu\nu}\to T^{\mu\nu}+\partial_\lambda F^{\lambda\mu\nu}\tag{2}$$ Where $$F^{\lambda\mu\nu}=\frac{\partial X^\lambda}{\partial(\partial_\mu\phi)}\partial^\nu\phi -\frac{\partial X^\mu}{\partial(\partial_\lambda\phi)}\partial^\nu\phi.\tag{3}$$ Is the above answer right? I'm not able to get this result! any help? How to restrict users on changing their wallpapers? I don't want my users to change the system wallpaper. How do I the lock the wallpaper down? Update  Users are changing wallpaper by right clicking the picture and choosing set as wallpaper. How to restrict this behaviour?  Is it possible to remove Backgrounds Tab from Appearance Preferences? If yes how? Why the definition of limit have a strict inequality rather than not? My question is why the definition of limit of sequence is for $\epsilon &gt;0$, there exist $N$ st for $n\ge N$ that $|x_n-L|&lt;\epsilon$ instead of $|x_n-L|\le \epsilon$ Why are there so many bottomless pits in Star Wars Finding $\int x^xdx$ What are the proposed theoretical explanations for the EmDrive? Note: This question is specifically about installed, desktop software. There is  specifically about free cloud-based software and services.  What free programs should every GIS user have installed?  I'm not necessarily referring to ESRI extensions or open-source products, but others that increase your productivity and ability to handle GIS tasks.  For example:    for writing code snippets or editing XMLs.  or  for quick graphic editing. I use  daily and I think it's worth mentioning. It's not GIS-specific, but it's a great tool, especially if used independently and on multiple projects where purchasing time-management software isn't reasonable. While it's not focused on GIS development,  has proven to be very useful in terms of increasing productivity and monitoring system resources. I have created a GIS "sidebar" on my desktop that holds all of my development tools, as well as links to the online resources I used the most. It's nice to be able to use one location, rather than many (e.g. taskbar, bookmarks in browser, search engine). Why do a lot of questions from around 2008 seem to have really high upvotes? WOL was working great on Bionic until yesterday's kernel update. How to diagnose/recover it?  Edit: if set to boot from 4.15.0-23 kernel it works. If set to boot from 4.15.0-24 it does not.  Edit2: WoL can be enabled with   sudo ethtool -s [card] wol g   but it isn't persistent. Searching for how to set it every boot.  Edit3: Per a comment by Kai-Heng Feng on this  this was an advertent change! (and therefore not a bug)  This is because the fix of LP: #1752772 has one commit [1] that disables WoL by default. Set WoL explicitly should solve your issue.  [1] https://github.com/torvalds/linux/commit/7edf6d314cd061e1d0a1b7bc0b511d64322c3f72 I found this odd relationship, $x^2 = \sum_\limits{k = 0}^{x-1} (2k + 1)$. MySQL Great Circle Distance (Haversine formula) I've got a working PHP script that gets Longitude and Latitude values and then inputs them into a MySQL query. I'd like to make it solely MySQL. Here's my current PHP Code:  if ($distance != "Any" &amp;&amp; $customer_zip != "") { //get the great circle distance      //get the origin zip code info     $zip_sql = "SELECT * FROM zip_code WHERE zip_code = '$customer_zip'";     $result = mysql_query($zip_sql);     $row = mysql_fetch_array($result);     $origin_lat = $row['lat'];     $origin_lon = $row['lon'];      //get the range     $lat_range = $distance/69.172;     $lon_range = abs($distance/(cos($details[0]) * 69.172));     $min_lat = number_format($origin_lat - $lat_range, "4", ".", "");     $max_lat = number_format($origin_lat + $lat_range, "4", ".", "");     $min_lon = number_format($origin_lon - $lon_range, "4", ".", "");     $max_lon = number_format($origin_lon + $lon_range, "4", ".", "");     $sql .= "lat BETWEEN '$min_lat' AND '$max_lat' AND lon BETWEEN '$min_lon' AND '$max_lon' AND ";     }   Does anyone know how to make this entirely MySQL? I've browsed the Internet a bit but most of the literature on it is pretty confusing. What cause the "from review" links to appear in comments? I sometimes see comments ending in "From Review" (hyperlinked to a review page) on questions and answers, e.g.        I spend a good bit of time in the review queues (on Unix &amp; Linux), but comments I make do not come with these "From Review" links. Note that I only have access to the "First post" and "Late answer" queues.  Do these links only appear for the higher-rep queues? I messed up my system earlier, I was greeted with a black screen, when booting in to Ubuntu. When I started up my laptop, I selected the recovery option from the grub menu, and chose fallback at root terminal. I saw that I was able to use the add user command, with it, I probably could use to create a privileged user on my machine.   Isn't that a security issue?  One could have stolen my laptop and at startup chose recovery and add another user, I'm fudged then. Including my data.  Come to think of it, even if you somehow remove that entry, one could boot from a live-CD, get a chroot up and running and then add another user, with the right privileges that allows it to see all my data.   If I set the BIOS to boot at my HD only, no USB, CD/DVD, Network startup, and set a BIOS password, it still wouldn't matter, because you'd still have that grub recovery startup entry.  I am fairly certain that someone from China, Russia can't hack my Ubuntu Trusty Tahr, from the network, because it's secure like that. But, if one has physical access to my - your - machine, then, well, that's why I'm asking this question. How can I secure my machine so that hacking through physical access is not possible?    Bug Report: Installed 14.04 on a non-PAE (Pentium-M), but now I can't update ("This kernel does not support a non-PAE CPU.") Here is what I'm looking at. This isn't my computer. I repair PC's and I had an end user with this low powered laptop running XP so I decided to let him try out lubuntu. The install went smoothly with the non-PAE boot switch, but now I can't update anything. I'd rather not have to format and start over since he's spent time configuring his system. Any tips would be appreciated. I tried sudo apt-get clean, sudo apt-get install -f, sudo apt-get update. No go.  Also his touchpad stopped working, the wireless stopped working, the keyboard works in firefox but not chrome, and in firefox the address bar sometimes turns black and gray for some reason. I was hoping the update would help address some of this stuff.  Here's the message I get trying to update:  Get:1 http://us.archive.ubuntu.com/ubuntu/ trusty-proposed/main linux-image-3.13.0-26-generic i386 3.13.0-26.48 [14.6 MB] Get:2 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main linux-image-3.13.0-24-generic i386 3.13.0-24.47 [14.6 MB] Fetched 29.2 MB in 2min 19s (208 kB/s)                                          (Reading database ... 169286 files and directories currently installed.) Preparing to unpack .../linux-image-3.13.0-26-generic_3.13.0-26.48_i386.deb ... This kernel does not support a non-PAE CPU. dpkg: error processing archive /var/cache/apt/archives/linux-image-3.13.0-26-generic_3.13.0-26.48_i386.deb (--unpack):  subprocess new pre-installation script returned error exit status 1 Examining /etc/kernel/postrm.d . run-parts: executing /etc/kernel/postrm.d/initramfs-tools 3.13.0-26-generic /boot/vmlinuz-3.13.0-26-generic run-parts: executing /etc/kernel/postrm.d/zz-update-grub 3.13.0-26-generic /boot/vmlinuz-3.13.0-26-generic Preparing to unpack .../linux-image-3.13.0-24-generic_3.13.0-24.47_i386.deb ... This kernel does not support a non-PAE CPU. dpkg: error processing archive /var/cache/apt/archives/linux-image-3.13.0-24-generic_3.13.0-24.47_i386.deb (--unpack):  subprocess new pre-installation script returned error exit status 1 Examining /etc/kernel/postrm.d . run-parts: executing /etc/kernel/postrm.d/initramfs-tools 3.13.0-24-generic /boot/vmlinuz-3.13.0-24-generic run-parts: executing /etc/kernel/postrm.d/zz-update-grub 3.13.0-24-generic /boot/vmlinuz-3.13.0-24-generic Errors were encountered while processing:  /var/cache/apt/archives/linux-image-3.13.0-26-generic_3.13.0-26.48_i386.deb  /var/cache/apt/archives/linux-image-3.13.0-24-generic_3.13.0-24.47_i386.deb E: Sub-process /usr/bin/dpkg returned an error code (1) How am I to "[u]se induction to show that $n$ straight lines in the plane divide the plane into $\frac{n^2+n+2}{2}$ regions"? It is assumed here that no two lines are parallel and that no three lines have a common point. Further, this is not a non-Euclidean problem, but I wouldn't mind a discussion on the non-Euclidean nature of the problem.  I was thinking it might be easier to show using the unit sphere.    A GOOD REFERENCE I FOUND THAT WILL BE USEFUL TO ANYONE COMING ACROSS THIS PROBLEM IS Concrete Mathematics, Graham, Knuth, Patashnik pp. 4–8. What's the difference between an adjective and a past participle? I'm really confused about the object     the doctor specialized will help you   or     the documents required   How can I tell in the future, if I have to use the past participle or the adjective? And what's the name of this structure? How do you set, clear, and toggle a bit?