i install a new operating system Ubuntu in my computer.During the installation i choose to crush the last system.i forget to copy and save all my web project before install the new system     opt/lampp   please somebody can help me how to find my folder project.thank
Are there any tools, methods, incantations to recover recently deleted files on Ubuntu?  If it makes any difference, I want to recover a  2.x database file. But would be better to have a method/tool that works on any kind of file.
Make the MSE favicon grayscale (like all other meta icons are) The new  for Meta Stack Exchange looks exactly the same as the one for the  site:        This can get a bit confusing, especially if you happen to have many tabs open from both sites.  It also looks a bit silly in the site switcher menu:  All the per-site metas (and MSO, even before the MSO/MSE split) have favicons that are grayscale versions of the main site icons.  Why not do the same for MSE? Conveniently, michaelb958 already wrote a nice  to do just that (and I  it to apply to the menu too), so you can easily see for yourself how it would look.  Or just see the screenshot below:  So here's my proposal: Let's make this gray icon the official MSE favicon.  Update: The meta.SE favicon has recently been changed to a simplified outline version of the SE logo:  I'm not sure how much I like the new logo (for one thing, it doesn't seem to match the dimensions of the main SE logo), but at least it's different, which was the main point of this request. Database general error: 2006 MySQL server has gone away Recently I started getting an error every time I try and add a content no matter what type.  This is the error that shows up in the browser:     Additional uncaught exception thrown while handling exception.        Original   PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT COUNT(cid) FROM {comment} WHERE status = :status; Array ( [:status] =&gt; 0 ) in comment_count_unpublished() (line 313 of /Applications/MAMP/htdocs/modules/comment/comment.module).        Additional      PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: INSERT INTO {watchdog} (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9); Array ( [:db_insert_placeholder_0] =&gt; 1 [:db_insert_placeholder_1] =&gt; php [:db_insert_placeholder_2] =&gt; %type: !message in %function (line %line of %file). [:db_insert_placeholder_3] =&gt; a:6:{s:5:&quot;%type&quot;;s:12:&quot;PDOException&quot;;s:8:&quot;!message&quot;;s:154:&quot;SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT COUNT(cid) FROM {comment} WHERE status = :status; Array ( [:status] =&amp;gt; 0 ) &quot;;s:9:&quot;%function&quot;;s:27:&quot;comment_count_unpublished()&quot;;s:5:&quot;%file&quot;;s:56:&quot;/Applications/MAMP/htdocs/modules/comment/comment.module&quot;;s:5:&quot;%line&quot;;i:313;s:14:&quot;severity_level&quot;;i:3;} [:db_insert_placeholder_4] =&gt; 3 [:db_insert_placeholder_5] =&gt; [:db_insert_placeholder_6] =&gt; ; [:db_insert_placeholder_7] =&gt;  [:db_insert_placeholder_8] =&gt; 127.0.0.1 [:db_insert_placeholder_9] =&gt; 1338336955 ) in dblog_watchdog() (line 154 of /Applications/MAMP/htdocs/modules/dblog/dblog.module).   I also get the following error in my php error file:     PHP Fatal error:  Uncaught exception 'PDOException' with message 'SQLSTATE[HY000]: General error: 2006 MySQL server has gone away' in /Applications/MAMP/htdocs/includes/database/database.inc:2136        Stack trace:   0 /Applications/MAMP/htdocs/includes/database/database.inc(2136): PDOStatement->execute(Array)   1 /Applications/MAMP/htdocs/includes/database/database.inc(664): DatabaseStatementBase->execute(Array, Array)   2 /Applications/MAMP/htdocs/includes/database/database.inc(2315): DatabaseConnection->query('SELECT expire, ...', Array, Array)   3 /Applications/MAMP/htdocs/includes/lock.inc(167): db_query('SELECT expire, ...', Array)   4 /Applications/MAMP/htdocs/includes/lock.inc(146): lock_may_be_available('theme_registry:...')   5 /Applications/MAMP/htdocs/includes/theme.inc(447): lock_acquire('theme_registry:...')   6 /Applications/MAMP/htdocs/includes/bootstrap.inc(427): ThemeRegistry->set(Array)   7 [internal function]: DrupalCacheArray->__destruct()   8 {main}         thrown in /Applications/MAMP/htdocs/includes/database/database.inc on line 2136   I am having a little trouble deciphering these error messages. Could anyone help me understand what's going on here? Adding user to a group - Why had to reboot? I was not able to access the VirtualBox shared folder, so I made the user part of the vboxsf group. But, still not able to access it. Rebooting the guest resolved the problem. Is it a bug? A reboot is not required to add a user to a group.   sudo usermod -a -G vboxsf praveensripati   There was similar query .  I am using 11.10 and don't remember seeing similar behavior in 11.04. Persist sort/filter selections How can I read my hard drive’s SMART status in Windows 7? How can I read the  S.M.A.R.T. state of my HDDs while using Windows 7, either automatically or manually? So, I just finished off the first part of an important task for school and today when I was going to continue, the document with my notes were gone. The only fragment I've got left of my file is the back up file, which doesn't show in the folder where I saved the document, but I can search for it.  Is there anyway which allows me to open the back up file, save it as a text file and continue my task? I don't really have the time for running restoring tools, which never has helped me in a satisfactory way anyway.  I wrote the document in gedit and my version of Ubuntu is 12.10. How to make Portable QGIS 3 Is it possible to make QGIS 3 portable with changed location for Qgis setup parameters folder.  For QGIS 2 it looked like this in qgis.bat file:     qgis --optionspath "X:\qgis" --configpath "X:\qgisini"   For QGIS 3 it doesn't work. Setup parameters are default placed in:      C:\Users\xxx\AppData\Roaming\QGIS I am trying to use the Alt+Right Click to select edge loops in Linux Mint but this shortcut doesn't work it is already used for Linux to reduce a window. I have checked the keyboard shortcut but it doesn't appear. A program I am using spits out LaTeX tables in LaTeX files (outreg2 command from Stata), which I run using texify to make pdfs of the tables.  I crop these tables (using pdfcrop) and embed them elsewhere.  However, the pdfs include page numbers, which prevent pdfcrop from cropping directly around the table.  I need an automatic way to remove the page numbers before cropping.  I want to insert the command \pagenumbers{gobble} into the LaTeX code to automatically remove the page numbers.    I believe   texify --pdf --texinfo="\pagenumbering{gobble}" filename.tex   should work.  It does not. No exception pops up, but the page number remains. I cannot find documentation anywhere showing examples of using the --texinfo option to splice LaTeX code into the file before running the LaTeX file to create a pdf.   How should I properly use the texify command?  Or is there another way to splice in  \pagenumbering{gobble} before running texify? Using a comma before "but" Is there a dollar amount that, when adding Massachusetts Sales Tax, precisely equals $200? Differentiable but not continuously differentiable. Given $f: \mathbb{R} \rightarrow \mathbb{R}$ defined as $$f(x)=\left\{\begin{array}{cc}x^2\sin\left(\frac{1}{x}\right)&amp;,x\neq 0\\ 0&amp;,x=0\end{array}\right\}.$$ I am trying to prove $f$ is differentiable at $x=0$ but not continuously differentiable there. I have shown that a smooth solution of the problem $u_t+uu_x=0$ with $u(x,0)=\cos{(\pi x)}$ must satisfy the equation $u=\cos{[\pi (x-ut)]}$. Now I want to show that $u$ ceases to exist (as a single-valued continuous function) when $t=\frac{1}{\pi}$.  When $t=\frac{1}{\pi}$, then we get that $u=\cos{(\pi x-u)}$.  With single-valued function is it meant that the function is 1-1 ?  If so, then we have that $\cos{(2 \pi-u)}=\cos{(4 \pi -u)}$, i.e. for two different values of $x$, we get the same $u$, and so for $t=\frac{1}{\pi}$, $u$ is not 1-1.  But if this is meant, how are we sure that for $t \neq \frac{1}{\pi}$ the function is single-valued? Can I see a list of gyms I left a pokemon at? Finding minimum bounding extent of given pixel value within raster? Allow moderators to refresh a user's network profile Currently, moderators have the ability to reset a user's username and/or profile text, and propagate that to the rest of the network, resetting it everywhere. However, often, the user's stackexchange.com network profile will also need to be reset, and this is currently only possible to do by either the user in question or staff.  Instead of bothering staff every time, moderators should have something available similar to chat, where moderators can change a user's parent site and have access to a "refresh profile" button, which will fetch updated information such as username and avatar from the parent site.  Currently, the only thing that moderators can do on stackexchange.com is to see hidden accounts. It would make sense for moderators to be able to refresh profiles there, like chat, and avoid pinging CMs every time this comes up. Which one of these two statements is correct?     Our staff do ...      Our staff does ...   And is staffs ever correct? Getting command-not-found working under zsh Importing DWG into QGIS project? I have a lot of DWG files like basemap, and water and wastewater network.  How do I import these files into my QGIS project? Is causality a formalised concept in physics?