I am going to install Ubuntu 12.04, and I wonder if I should trust/run the .sh script proposed on this site: .  By the way, do I need to anything in particular after installing Ubuntu?
I am new to Linux and Ubuntu. When I don't know how to do something with this OS I search on the web and Ask Ubuntu and always find the answer.  But sometimes it's not a great answer nor complete tutorial. I follow the instructions anyway, but I don't know what all the commands mean.  So my question is:   When I follow a tutorial, am I 100% safe? If not, then how can I tell I am in danger?
How to tell if a certain item is in a player inventory? I am trying to create a challenge world where a certain item (e.g. a Netherite Sword) must be collected. How can I check automatically if a player has it (using commands), and then congratulate the winner? This question is specific to Bedrock Edition 1.16. I have tried other solutions so many times and they don't seem to work. See also: Checking if file is checked out through CSOM SQL to generate a list of numbers from 1 to 100 Is there a free site to play Yu-Gi-Oh? I have a table and I am always getting the data by ordering a column. In my case, I  order by datenum. However, the selection is so slow because of the ordering.  Is it possible to order the table after datenum. This column is defined as unique. If  defined as an index, would the selection will be faster? Is it possible to change the linkage of Nether portals? I have 3 portals that link together, but I want to remove at least the middle one.  Edit for clarification:    The portals I created are 1, 4 and 5, the others were spawned by the game as the "other end". I want to remove the link between 5 and 4 and create a link between 5 and (the yet non-existent) 6.  The goal is to be able to travel to 5 in the route: 1, 2, 6, 5. I don't really need 3 and 4 now. How can I delete an account on a specific site? My account has 20 (!) sites associated to it.  I only use it for 3-5 sites.  To reduce clutter, I would like to delete my profiles that I do not use much.  I have went through , but when I enter the profile URL as:  http://russian.stackexchange.com/users/5772/alex   it gives the error message:     oops! this isn't a link to a valid profile   What procedure do I go through to delete my profile only on certain sites? Does Change Data Capture (CDC) work in a SQL Server 2012 AlwaysOn Failover Cluster Instances setup? Does  work in a  setup?  There would be two nodes in the AlwaysOn Failover Cluster Instances setup and two Domain Controllers.  We are not using AlwaysOn Availability Groups.  Will CDC work? and will it failover? Why didn’t anyone dial Abydos before Daniel solved the mystery of the seventh symbol? From what I recall from the movie, Daniel only finds the seventh symbol... however when he explain they give way to show him the star gate and they put their sequence in the dialing computer. This proves the dialing computer was prepared to dial 7 chevrons.  It’s also stated they’ve also tested the 6 previous symbols in the order they appear on before, one has to assume only to fail when they insert the 7th, making them aware of the fact you can, at least dial 7th chevrons.  With 39 chevrons on the gate and 6 already locked in, that leaves 33 to try to get a lock. Those are not that many not to go and simply try one by one so... how come nobody brute forced the thing? Can Hooke's law be derived? Can we derive  from the theory of elasticity? I know it is not a fundamental law and therefore can be derived from more basic considerations. Possible Duplicate:          Sounds like a silly question, but bear with me..  If you go into Peet's Coffee and access the wifi, you're taken to a web page that requires a 4-digit code you get with a purchase.   If you do the same at Starbucks you're taken to a page and asked to OK the terms of service.   I want to build something similar for a local independent coffee shop, something that requires the user to write a little about themselves before they can access the Internet.  I'm not sure which way to go -- looking for wifi routers that run an internal web server, or finding one that lets you direct users to an external website for authentication, somehow redirecting back to the access point once successful.   Has anyone done anything like this and can share their experience? What level is a spell if you cast it without expending a spell slot? There are ways to cast spells without expending a spell slot such as:  Master Transmuter (PHB 119):     Restore Life. You cast the raise dead spell on a creature you touch   with the transmuter’s stone, without expending a spell slot or needing   to have the spell in your spellbook.   Armor of Shadows (PHB 110):     You can cast mage armor on yourself at will, without expending a spell slot or material components.   Whispers of the Grave (PHB 111):     You can cast speak with dead at will, without expending a spell   slot.   See also: Channel Divinity: Read Thoughts (PHB 59-60), Mystic Arcanum (PHB 108), Beast Speech (PHB 110), Chains of Carceri (PHB 110), Eldritch Sight (PHB 110), Fiendish Vigor (PHB 111), Mask of Many Faces (PHB 111), Master of Myriad Forms (PHB 111), Misty Visions (PHB 111), Otherwordly Leap (PHB 111), Signature Spells (PHB 115), Spell Mastery (PHB 115), Shapechanger (PHB 119), Boon of Spell Mastery (DMG 232) and Boon of Spell Recall (DMG 232).  What level are these spells if you cast them without expending a spell slot? I need to use an alias in the WHERE clause, but It keeps telling me that its an unknown column. Is there any way to get around this issue? I need to select records that have a rating higher than x. Rating is calculated as the following alias:  sum(reviews.rev_rating)/count(reviews.rev_id) as avg_rating Let me begin by stating that I did google the answers (and I'll reference to them soon). Yet each of the resources I found discussed one particular method, I'm interested in a comparison of the approaches.  So far, I've found three ways to deal with this problem:   split the number into two columns (integer and fractional parts), as documented  or . The LaTeX code is simple, but the approach is a pain when it comes to copying and pasting tables from external sources. use  manually use Mike Zhang's automatic  (). I have yet to test it.   What do most people use? dcolumn? Are there other options? Dual edge detector I am designing a hobby project that will run on a battery so I am trying to reduce power consumption. The SoC I am using has the ability to go into a deep sleep mode where it consumes very little power, and then can be interrupted by a falling edge on a pin.  I want to generate a high-low-high pulse when the state of a reed switch changes in either direction. I have been reading a lot and it seems that a one-shot monostable circuit can be built from a couple of transistors and an RC circuit to generate an output pulse when an edge is detected. I understand how that works. However, I can't figure out the best way to also pulse on the opposite edge.  One thought, was to just combine two one-shots that are configured to trigger on rising and falling edges respectively, and use the transistors at the output to pull the common pull-up low (kind of like a NOR gate).  Since I am a hobbyist, I am mostly using passive components. What is the "real" way of doing this in a low-power configuration using logic devices?  Edit: I figure I should mention something about the timing requirements. Normally the reed switch will be either open or closed for many seconds at minimum before changing states.  Edit: Here is an example of the circuit I was using for detecting only the falling edge:    And here is the ~20ms pulse it was producing for ~200ms button press simulating the reed switch (Channel 1 is Vbe for T1 and Channel 2 is measured at RST): Finding real roots of negative numbers (for example, $\sqrt[3]{-8}$) Find the sum $\frac{1}{2\cdot 3}+\frac{1}{3\cdot 4}+\dots+\frac{1}{99\cdot 100}$ Please help me calculate the following sum     $$\frac{1}{2\cdot 3}+\frac{1}{3\cdot 4}+\dots+\frac{1}{99\cdot 100}$$ What is the logic behind the timer of the Sojourner Badge? Does the 24 hours timer start:     when you hack a portal on a particular day     or     does it use the calendar days and check if you did hack a portal on a particular day   or     does it simply use a fixed international timezone to calculate the 24 hour cycle   or     does it use the agent's hacking cell's timezone to start it?   If it's the calendar days method than the explanation of the badge would be a little bit misguided because you could hack a portal on 00:01 on Saturday and then hack another one on 23:59 on Sunday and it would be practically two days between two hacks.  If it's based on the agent's last hack for a particular day then the explanation still would be problematic?  The third option would be a little bit unfair (or timezone racist) for the rest of the world.  The last option (the cell's timezone) would/could be both unfair for travellers and/or non-travellers.  Does anyone know any details about it? I'd like to know if the following problem of elementary linear algebra is already solved / solvable.  For two (singular) $n\times n$ matrices $P$ and $Q$, if $\det(\lambda P+\mu Q)=0$ for any $\lambda,\mu\in\mathbb{R}$, what are conditions on $P$ and $Q$? Over the past few weeks, there have been a number of complaints about users making suggested edits en masse whose quality was at least questionable.  Let an example of a low-quality edit be the addition of the web-frameworks tag to dozens of questions about the PHP web framework Laravel. No one is ever going to use it in a search, but Laravel is a framework, right?  (If you disagree about this being a low-quality edit, please  bear with me anyway - my point here is that the system through which such conflicts could be settled is broken.)   Examples          This is a toxic situation guaranteed to create strife because -   The new user is happy to have found a way to participate and earn some rep; they may be genuinely feeling that they are improving the site. The reviewers greenlighting most of their suggestions confirms them in their belief.   The reviewers usually see only one edit - and it's easy to see how they might go, "meh, this isn't a terribly useful edit, but hey, maybe it helps someone, and it's a new user. No point discouraging them."   The veteran users who check out the editor see dozens of what they perceive as low-quality edits, usually ignoring anything else that should be fixed in the post. To the veterans, the new user is systematically looking for excuses to make their pointless edits, creating a giant mess in order to  gain some rep - a mess they have to clean up, while there are no consequences for the editor, who gets to keep their ill-gotten points. While a bad question or answer can be downvoted - usually leading to a change of behaviour eventually - the edit system looks like it's wide open for gaming.   So tensions are high, and when there's dialog it can be angry. I'm not saying either side is completely right. I'm completely prepared to believe that many of these edits are in good faith, etc. But it's a mess because it's frustrating people. As said, there are no consequences for bad-faith mass editing; apart from commenting on some random post, there is no way to communicate with an editor. The outcome of a moderator flag is very much uncertain.  The absence of a clear set of rules means there's plenty of room for heated arguments.    Something needs to change here.  Either   We need super clear rules on what makes a good tag edit Tag-only edits should be allowed only for 2k+ users, or they should not gain 2 reputation points for &lt;2k users The possible 1000 rep gain for suggested edits needs to be rate-limited (say, 200 per month) (this is my favourite!) The possible 1000 rep gain for suggested edits needs to be lowered, say to 500 or 250 Rollbacks of suggested edits should result in annulment of the 2 points gained (this is terrible) There should be a system to vote on edits (yes, that's been suggested before) There should be a defined and officially sanctioned pathway, and ruleset, for moderator flags cast about these users    ... or something else. But something needs to give.