I am a bit confused about the release schedule of Ubuntu. AFAIK, it releases a new version every 6 months right? How about the LTS version?
I want to know where I can find updated information about all the stable and in-development versions of Ubuntu, where I can find this information?     This question is meant to be a canonical question. It expects to answer the following questions:         Is X version stable yet?   Is X version in beta?   Is X version still supported?   What versions are still supported?   What are the versions in Beta/Alpha?   Until where X version will be supported?   Have X version ceased support?   When will be X version released?   Where I can download any release?   When will the next LTS version of Ubuntu be released?         The list is not exhaustive.
Unable to get Excel to recognise date in column I constantly have problems working with dates in Excel, I must be doing something wrong but I don't understand what.  I have a spreadsheet, exported from our exchange server, that contains a column with dates on. They have come out in US format even though I'm in the UK.   The column in question looks like this  04/08/2012 04/09/2009 04/01/2010 04/21/2011 04/05/2012 08/30/2009 08/29/2010 08/28/2011   In Excel, I have highlighted the column and selected Format Cells.... In this dialog box, I have selected the Date, selected English (United States) as the locale and chosen the matching date format from the list. I hit OK and try to sort the data by this column.   In the sort dialogue I choose this column, select sort on Values but the order only gives me options for A to Z, not oldest to newest as I would expect.  This in turn sorts the date data by the first two digits.  I am aware I could re-format this data to ISO and then the A to Z sort would work but I shouldn't have too, I'm obviously missing something. What is it?  EDIT: I messed up the bounty but this should have gone to @r0berts answer, his first suggestion of Text to Columns with no delimiter and choosing 'MDY' as the type of data works. Additionally, if you have a time (i.e. 04/21/2015 18:34:22), you need to first get rid of the time data. However after that the method suggested by @r0berts works fine. Maybe the concept, why it's used, and an example. Schwarz's Lemma and functions with positive real part Problem:     Let $D = \{ z \in \mathbb C : |z| &lt; 1 \}$. Suppose $f : D \to \mathbb C$ is a non-constant analytic function such that $\mathrm{Re} f(z) \geq 0$ for all $z \in D$.      (a) Show that $\mathrm{Re} f(z) \neq 0$ for all $z \in D$.      (b) Using a Möbius transformation and Schwarz's lemma, prove that if   $f(0) = 1$, then $$ |f(z)| \leq {1+|z| \over 1-|z|}. $$   What can be said if $f(0) \neq 1$?      (c) Show that if $f(0) = 1$, then $f$ also satisfies $$ |f(z)| \geq {1-|z| \over 1+|z|}. $$   Progress:  (a) We can use the open mapping theorem.  (b) We can compose a Möbius transformation $m$ that sends the right-half plane to $D$ with $f$. Then $h = m \circ f$ satisfies the hypotheses of Schwarz's lemma by construction. Simple manipulations of the inequality from Schwarz's lemma give the result.  (c) Looking at part (a), we know that $\mathrm{Re} f(z) \neq 0$, and so $f(z) \neq 0$. Thus, we can use the function $g = 1/f$ in the statement of part (b).  Question:  What about when $f(0) \neq 1$? I don't think you can get anything from $f(z)-f(0)+1$ unless $\mathrm{Re} f(0) &lt; 1$. And you can't in general rearrange the inputs of $f$ because $1$ isn't necessarily in the image of $f$. Also, I don't think you can get anything from $f(z)/f(0)$ unless $f(0)$ is real, because otherwise the range of $f(z)/f(0)$ could extend into the left-half plane. Say I have two points. One at $A = (0, 0)$ and another at $B = (0, 10)$. I wish to derive an equation for a line that, for any point $P$ on the line, would equal a set ratio for the distance $P$ to $A$ and $P$ to $B$.  This is easy if the predetermined ratio for $A:B$ is $1:1$. I would create a line from $A$ to $B$, find its midpoint, then create an orthogonal line at the midpoint. Then at any $P$ on the line I know that the ratio distances from $P$ to $A$ and $B$ will be $1:1$.  But what if the ratio for $A:B$ is something like $11:18$?  This is for a positioning algorithm I am implementing - not for homework :)  EDIT: Note - If an exact formula is not possible, an approximation of the line out to $\pm 200$ from $A$ or $B$ is acceptable as values further from $A$ and $B$ will not be utilized anyway. A linear equation for the final result/approximation is ideal for speed in running multiple computations. Community user "stealing" tags? What is the number of automorphisms (including identity) for permutation group $S_3$ on 3 letters? Flight Search from anywhere to a specific destination Many flight search engines allow you to pick a departure airport and search for flights to anywhere. E.g.  gives you a nice map with prices next to destinations for a set of dates and an origin you selected. We covered this question widely in  here on our site.  I want to have the reverse, i.e. I know my dates and my destination (for a one-way flight) and I want to know from where it is cheapest to fly there. Is there any flight search engine out there to achieve this?  Google flights does not do this, they pre-compile the "from"-field if I try to leave it empty. I know I could use  with a wide range of departure airports but that does not give me low-cost carriers and I do not trust the matrix results for such a wide range of parameters anymore.  Edit: It has been asked in comments why I would want such a feature. Well currently I'm planning my summer vacation and I would like to spend one week traveling around basically anywhere in that area before I have to go to a specific location at a specific time. One of the main price and convenience factors for me is that final flight so I would like to optimize it first. I'm sure I'm not the only one with that kind of constraints. How can I stop applications and services from running? When my phone starts up there are several application/services running in the background that I would rather not.  And when I press the Home button while using an app, that app usually goes into the background without exiting.  How can I stop these apps from running? I have a directory that I am trying to clean out that contains both files and subdirectories.  What I am trying to do is simple: move all the files into another directory, but leave all the sub-directories as they are.  I am thinking something like:  mv [*_but_no_dirs] ./other_directory   It seems like there should be a simple way to do this with wildcards * and regex...  Anyone have ideas? Mac-like alt-tab replacement for Windows 7? Is there an alt-tab replacement for Windows 7 that works in the same manner as command-tab and command-tick (tilde) on OS X?  Requirements:  1. Completely keyboard-shortcut-based, no mouse action should be necessary.  2. 2 keyboard shortcuts with the following behavior:  a.) alt+tab:       cycles through open applications (NOT windows... applications, meaning even if i have 10 firefox windows open, I only want to see firefox once in the list that comes up when i hit this shortcut)  b.) alt+`:     cycles through WINDOWS that are instances of the currently active application (meaning if firefox is my active window and i hit shortcut2, it will cycle through those 10 firefox windows, while ignoring any other windows from ANY other application).    Update 08:40 5/21: I tried out eidylon's suggestion, TopDesk.  It doesn't provide any of the functionality described here.  Other apps I've already tried:   VistaSwitcher Switcher Dexpot (awesome app, still using, but doesn't do what I want in this case... also looked for plugins but couldn't find one that does it) UltraMon Nvidia nView   update: Unfortunately I still haven't found a solution for this.  update: made this a community wiki in case anyone is ever able to find a solution for this. Beamer -- not indenting itemize in a single environment The output in the MWE posted at the end of this post is shown below. Notice how the default indentation from itemize gives an asymmetric slide w.r.t the spacing to the left and right of the itemize environment. How can I push the bullet points to the left so that the spaces to the left and right are the same? Such a solution would ideally be:   implementable on a one-off basis, so that it is applied when necessary (since some itemize environments should be given the default indentation) independent of the margin size, so that the solution doesn't need to be changed when the margin size is changed     \documentclass{beamer}   \begin{document}  \begin{frame}{A title} \begin{itemize} \item Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod \item tempor incididunt ut labore et dolore magna aliqua. \item Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi \item ut aliquip ex ea commodo consequat. \begin{itemize} \item Duis aute irure dolor in reprehenderit in voluptate velit esse \item cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat \end{itemize} \end{itemize}    \end{frame} \end{document} How do I implement a retro-style password-based "savegame" system? Please do not "lie" that the Community user "modified" the question If the Community user bumps a question, It says It has modified it:    However, It did not really modify the question, It rather just visited it. The word "modified" is a bit unfortunate IMHO because it suggests that something changed in the question or its answers, which is not true. I therefore suggest that we look for another word which would be more descriptive and less confusing. Some come to my (and others') mind:   visited, poked, bumped, promoted, dredged up, brought up, ...   (Actually, "Bumped" is even officially used now:  and .)  I'm not a native speaker and maybe someone find a better word. To me, visited sounds the best, but that may be only me. It makes sense, too, since Community really just visits the questions, with the site-effect of them getting bumped. It shouldn't confuse anybody.  Actually, it can be harmful in some sense, since , and it is interesting to know that this has happened, so that more people can check that the edit makes sense. You therefore can't simply ignore all "edited by Community" messages. (Thanks to Monica Cellio for pointing it out.)  (Remark: I know this has been questioned before (    ) but I think it has never been requested to change the action title to something more descriptive. If I'm wrong, I apologize.) (The "lying" it the question title is meant as a sarcasm) do I only get a limited number of at-will powers? Find the derived subgroup of $A_4$.   Since it is $A_4$, for a permutation $\sigma$ to be in $A_4$, $\sigma$ must have a cycle structure of $2$ cycles. Therefore, $\sigma=(ab)(cd)$.  The commutator of such elements, would be obviously another permutation of $2$-cycle (of length $2$).  Does it mean that $A'_4=A_4$? Is there a maximum possible acceleration? I tried to add a new repository to software sources, but "add source" button is unavailable. I can't click on it.  I also tried to add a new software source from the terminal, but it didn't work.  sudo‬‬ ‫‪add-apt-repository‬‬ ‫‪ppa:n-muench/burg‬‬   s‫‪udo‬‬: command not found     I also tried these commands:  ‫‪sudo‬‬ ‫‪add-apt-repository‬‬ ‫‪deb‬‬ ‫‪http://ppa.launchpad.net/n-muench/burg/ubuntu‬‬ natty‬‬ ‫‪main‬‬   sudo‬‬: command not found Lock in mysql database Penalized methods for categorical data: combining levels in a factor Wireframe iOS design apps for iPad? Is there an app for iPad to assist in wireframe design for iPad and iPhone apps?  I don't mean actual development, just placing standard widgets and the things you usually do with photoshop and associated kits.