Difference between process in background and daemon What is technically the difference of a process that started in foreground and was manually put into background and a daemon? Do they have different properties?
What's the difference between running a program as a daemon and forking it into background with '&'? What are the practical differences from a sysadmin point of view when deploying services on a unix based system?
How to organically merge nested associations? Why does this CSS margin-top style not work? Can you 'exit' a loop in PHP? I have a loop that is doing some error checking in my PHP code. Originally it looked something like this...  foreach($results as $result) {     if (!$condition) {         $halt = true;         ErrorHandler::addErrorToStack('Unexpected result.');     }      doSomething();  }  if (!$halt) {     // do what I want cos I know there was no error }   This works all well and good, but it is still looping through despite after one error it needn't. Is there a way to escape the loop? Can the category of chain complexes be realized as a functor category? As the title says, is there some sort of category $\mathsf{C}$ which can be thought of as the "walking chain complex", so that the category of chain complexes in some other category $\mathsf{A}$ can be realized as $\mathsf{A}^\mathsf{C}$ (or perhaps some subcategory thereof)? Is WD-40 really bad to apply on bikes? I was told so but still see people doing that.   Also I saw WD-40 launching their new products of bike lubricant and degreaser. Did anybody try those? Can I have 8 GB RAM on 32-bit Win 7? Possible Duplicate:             According to , Win 7 only supports 4 GB of RAM. I, however have been reading some forums and some say they are using 8 GB RAM with good performance. I am wondering if I can use 8 GB before I purchase. Let S be a finite set.Let F be a surjective function from S to S.  How do I prove that it is injective? How do you switch from Wayland back to Xorg in Ubuntu 17.10? Some of my applications don't work on Ubuntu 17.10 Wayland. How can I switch back to Xorg? Given $n+1$ points in the plane, Lagrangian interpolation gives the unique polynomial of degree less or equal to $n$.  From the examples I've seen so far, interpolation polynomials all have degree exactly $n$ but I don't know if there might be a set of points for which the interpolation gives a polynomial of degree strictly less than $n$.  Many thanks for your answers. Why are cryptography algorithms not exported to certain countries? There have been strict laws about the export of crypto software to certain countries. I can understand the intent, but never gauged the fact that there is nothing stopping these countries from developing their own crypto software. So why limit the export?   And in light of the recent NSA revelations, of backdoors being engineered into crypto algos, wouldn't the export of such compromised algorithms have helped to unravel secrets? Give $a, b. c$ be the lengths of a triangle and $a+ b+ c= 3$. Prove that: $$\frac{a}{b}+ \frac{b}{c}+ \frac{c}{a}\geq  \frac{1}{a}+ \frac{1}{b}+ \frac{1}{c}$$ My try  We have England MO inequality: $$\left ( \frac{a}{b}+ \frac{b}{c}+ \frac{c}{a} \right )^{2}\geq  \left ( a+ b+ c \right )\left ( \frac{1}{a}+ \frac{1}{b}+ \frac{1}{c} \right )$$  and $$\frac{a}{b}+ \frac{b}{c}+ \frac{c}{a} \geq  3=  a+ b+ c$$  But it cannot be used to prove the above inequality and how to use triangle inequality in this inequality. I need the help. Thanks! Do conjugate priors just lead to a posterior that is a modification of the parameters of the prior? We know, for example, that the conjugate relationship between the classic beta-binomial is as follows:  \begin{align}  y &amp;∼ \mathcal{Bin}(n,\ θ)  \\  θ &amp;∼ \mathcal{Beta}(α,\ β)  \\ θ|y &amp;∼ \mathcal{Beta}(y + α,\  n − y + β) \end{align}  Notice how the posterior is just a change in parameterization compared to the prior. Is the posterior of conjugate priors just a change in parameters? Normal ubuntu desktop will update ubuntu-desktop package and it's dependencies on release upgrade. Will Ubuntu minimal cd install ubuntu-desktop on release upgrade or just installed packages? A No-Nonsense Introduction to Quantum Field Theory Advanced search criteria for bounty questions? All active questions with awarded bounty can be seen in the Featured tab. However, there seems to be way to make searches to the contents of any particular question tab.  I realize that this is pretty much a duplicate of  but it has no clear answer whether there are any plans of supporting bounty searching or not.  So, could there possibly be a hasbounty:1 advanced search criteria? What defines a AAA game? I tried to find a precise definition. I found clues on  and , but I cannot find more than an approximation like:     Equivalent of blockbuster movie in cinema, an AAA game is a game with highest development budgets and levels of promotion.   The definition seems imprecise. How can I be sure a game is AAA?   Let's imagine a small indie studio making games and growing up. They hire more and more people through the years and invest more and more money in their game. At which milestone would their game be considered as AAA? Name of mean absolute error analogue to Brier score? Yesterday's question  got me curious about probability scoring. The  $$\frac{1}{N}\sum\limits _{i=1}^{N}(\text{prediction}_i - \text{reference}_i)^2$$ is a mean squared error measure. Does the analogous mean absolute error performance measure $$\frac{1}{N}\sum\limits _{i=1}^{N}|\text{prediction}_i - \text{reference}_i|$$ have a name, too? Putnam and Beyond AM-GM help swap x and y axis on data generated plot How to create live autofill search? I am currently trying to create a wordpress search function that shows live results underneath the search bar. There is an example on the  website (screens below). I'm not looking for an autofill like you would find on Google.com which completes words you type, rather I want it to find actual posts on the site.   I tried doing a scrub through Wordpress Answers and other similar resources but have only run into implementing a Google type search which is not what I am looking for. Any help or points in the right direction would be greatly appreciated.