I am a beginner in Ubuntu, so please help me to solve this problem. I bought a new laptop with a hard disk of 500 GB. First I installed windows 7 and allocated 400 GB for that. Now I installed Ubuntu using the windows installer with a  USB pen drive in the 100 GB left for that. It worked perfectly. But I faced a problem when I reinstalled my Windows 7 OS. I am now unable to get the dual boot process back. I tried to re-install Ubuntu, too. But when I tried to do that using the windows installer, I am not able to find the partitioned space of 100 GB already containing Ubuntu OS. It shows only the space wich is allocated for Windows.   This is my problem. Now what should I do to get the dual boot back?
I installed Windows 7, which ate Ubuntu's boot file. When starting up the computer, it now goes straight to Windows, without giving me the option of booting Ubuntu.   How can I get Ubuntu back?
Proving an entire, complex function with below bounded modulus is constant. How would I show that an entire function $f$ with the property $|f(z)| \geq 1$ must be constant?    I'm aware of Liouville's theorem, just not sure how to apply it here. Matching text using grep or awk How did Princess Leia survive this? In the Last Jedi movie, there is a scene where      her spaceship is taken down, Princess Leia is thrown into outer space, and seen floating there, frozen.    However, she manages to survive this, while any ordinary human being couldn't.   How did she manage this? Is this done by using the Force? Let $T:V\to V$ be a linear map, where $V$ is an inner product space. Given $T^2=\frac{T+T^*}{2}$, prove that $T$ is normal and that $T=T^2$. Let $T:V\to V$ be a linear map, where $V$ is a finite-dimensional inner product space. Given $T^2=\frac{T+T^{*}}{2}$, I would like to prove that $T$ is normal and that $T=T^2$. The first part, to prove that $T$ is normal, is quite easy: from $T^2=\frac{T+T^{*}}{2}$ we'll have $\,T^{*}=2T^2 - T$, and as $TT^{*} = 2T^3 -T^2 = T^{*}T$. Now, I need to prove that $T=T^*$, then $T = T^2$ is immediate. I have been thinking about this question for some days and I can't figure out in what technique to prove that $T = T^{*}$. Linear algebra skew symmetric What is the Page Object Pattern in Selenium WebDriver? Received an email intended for another person I'm not really sure how email routing works, but someone ordered something on Amazon and I received the email instead of them.  Or maybe we both got it, I don't know.  The order doesn't show up in my account, so I'm certain I wasn't charged for it, but I shouldn't be getting other peoples' emails.  We'll say that my email is johndoe1@gmail.com, and somebody who's email is john.doe1@gmail.com places an order on Amazon.  The confirmation email is sent to me at johndoe1@gmail.com.  I checked the email header, and it did say To: john.doe1@gmail.com which is not my email address.  At first I thought that Google ignores periods in email addresses, but I tested the account setup and it doesn't give any error when you put a period in the address.  I didn't create the account; I just used the "check availability" function and the address I chose with a period was fine.  Maybe someone with knowledge about how Email works could tell me why this happened.  Is this a bug in the way Amazon sends emails?  Or is it a bug in how Google receives them?  Who should I report this issue to? Difference between `dpkg -i` and `apt-get install` From all the other Q&amp;A (like: ) I understand that apt-get is a wrapper over dpkg and provides dependency management.  Assuming I'm installing something that doesn't have any dependencies (or they're also installed at the same time) would there be any difference between installing it using apt-get vs dpkg  E.g. (kinda concrete differences I'm looking for)   say dpkg can not download the pkg from somewhere, I must download before starting installation, whereas apt-get will do this on my behalf. dpkg won't configure pkg, it'll only copy files. apt-get will configure too.   ... Creating surface from points in ArcGIS for Desktop? how to create surface from points in ArcGis? I have a points (centroids of the neighbourhood and number of people living in every neighbourhood) and i would like to create surface that would present density of population. 10 servers to administer and I'm a history major Through reasons that don't warrant exhaustive discussion, I find myself in charge of 10 servers:   A domain controller-~500 hosts/~350 users IIS web server-This is where we make our money SQL server-The crown jewels Exchange server Linux box for data entry AV server Backup server A few others tossed around   The company where I work believes everybody is replaceable and therefore believes they can pay a minimum wage for any position. The IT manager and Sysadmin quit recently and I think I was the only person who did not take a big step backward when the call went out for volunteers. This also explains why someone with my background is in this position. That is the reality, as much as I wish it otherwise.  What are the things I should be doing to keep those systems running? There is no written procedure left behind and I crammed the A+ and Network+ certs in the last two months but that leaves me with some theory and no practical experience.  I am in the process of teaching myself powershell but from here to there is a long way. I have no scripting or programming experience.  What tasks should I be performing? What practices should I implement?  I understand I am probably hosed but a lifeline to get me through would be helpful. How to test if my server is vulnerable to the ShellShock bug? How can I ensure my Bash installation is not vulnerable to the  bug anymore after the updates? If $F:M\to N$ is a smooth embedding, then so is $dF:TM\to TN$. Why are there two ticker symbols for Google — GOOGL and GOOG?  They seem to be mostly identical, but their market values are different: currently, 551.64 for  and 548.79 for . LWC to display salesforce objects as a picklist onclick I have a requirement where I need to display list of salesforce objects as a picklist when a radio button is clicked.  Being new to LWC development, I could not figure out what is the right approach to do so. I have come across  from Salesforce articles where we can display radio buttons but as per my scenario, i need to display list of all salesforce objects as picklist when a radio button option is selected.  Can anyone please suggest the right approach to do so. I would like to be able to set a flag at the beginning of the main flag (say output) that tells if I want to produce a paper document or an electronic document.   Then I should check this flag to define or not empty pages, hypperref, oneside or twosides, etc.  How could I do that ? Consider the following table:  id  title   genre1  genre2  genre3  genre4  genre5 1   Movie1  Thriller    Crime   NULL    NULL    NULL 2   Movie2  Fantasy NULL    NULL    NULL    NULL 3   Movie3  Political   Philosophical   Historical  NULL    NULL 4   Movie4  Science Fiction NULL    NULL    NULL    NULL   When I unpivot genre1, genre2, ... the NULL values are removed, so that, for example, the rows for Movie1 would be:  id title  genre     original_column 1  Movie1 Thriller  genre1 1  Movie1 Crime     genre2   Is there a way to include NULL values, for example:  id title  genre     original_column 1  Movie1 Thriller  genre1 1  Movie1 Crime     genre2 1  Movie1 NULL      genre3 1  Movie1 NULL      genre4 1  Movie1 NULL      genre5   I can SELECT ISNULL(genre1, '*'), ISNULL(genre2, '*') ..., but suppose I want the values to appear as NULL? Is there a better way than:  WITH  -- SELECT that unpivots table AS unpivoted SELECT unpivoted.id,    unpivoted.title,    ,CASE unpivoted.genre WHEN '*' THEN NULL ELSE unpivoted.genre END    ,unpivoted.original_transaction FROM unpivoted   Also, I notice that the query that returns the source data to be unpivoted MUST have an alias. For example:  SELECT ... FROM   -- *must* give it an alias or it's a syntax error   (SELECT ... FROM) AS source    UNPIVOT(genre for original_column IN (genre1,genre2, genre3,genre4,genre5))   Does anyone know why? I have not found a way to refer to the alias anywhere in the query. Suppose a cleric casts Zone of Truth on a captured enemy. Unbeknownst to them, the enemy is a rakshasa. Zone of Truth says (PHB, p. 289):     You know whether each creature succeeds or fails on its saving throw.   But (MM, p. 257):     The rakshasa is immune to spells of 6th level or lower unless it wishes to be affected.   Assuming the rakshasa doesn't wish to be affected by the Zone of Truth spell, does the caster know this?  More generally, does a caster know when targets are unaffected by a spell they have cast, either because they have made saving throws, or because they are outright immune to the spell or its effects (e.g., casting Ray of Sickness on a shadow demon, which is immune to poison damage and the poisoned condition)? Volume of the solid generated by revolving the region R enclosed by the curve - Disk and Shell method Find the volume of the solid generated by revolving the region $R$ enclosed by the curve $y=x^3$, the $x$-axis and the line $x=1$.  (About the line $y=1$ using the disk and shell method.) Triggered send status queued, need to get an alert Story where people inject "books" in the back of their necks? I read this story in middle school or high school and I cannot for the life of me remember the name of it. I think it started off in a small clan of people, there was a young boy who had just come of age and he had some kind of gift that related to the books? Also I think the injecting was illegal, because I vaguely remember the boy encountering an old man who had a bunch of books that he had to keep hidden. There was also a city and he met a girl there that was Special some how. I may just be merging memories but I think at some point the boy and girl went to an underground city?  Does anyone know what I'm talking about?