When I type   cd `   into a terminal, then I get this  &gt;   Even ls or cd is not working. Attempting to run such a command on the &gt; prompt just gives another &gt; prompt.  Please explain the meaning of the above command. And how do I exit it?
No matter what I do I'm stuck with &gt;. How can I enter a new command?  $ chmod -R 600 `/ .ssh &gt;  &gt; chmod &gt; id_rsa.pub &gt;  &gt; sudo chmod 600 ~/ssh/id_rsa     I was trying to sync the master and slave by following a youtube video when I encountered the "permission denied" issue. While trying to resolve it I got stuck with &gt;. Now I can't enter any new command.   Please guide me. I'm a Linux/AWS newbie.
Which of these two phrases has more negative undertone?      "The interview I had was not very good"    or      "The interview I had was not good" I need to sync the Downloads folder to iCloud and then all the downloads should automatically sync with iCloud.   I tried to:   Create a new Downloads folder in the terminal of MacBook in the Documents directory. Tried to move the default Download folder to the newly created folder.   When I tried to use the mv command to move the default Downloads folder to the newly created Downloads folder in Documents in the terminal, it gives permission denied error.  I am trying to achieve what was suggested by user PhillipHolmes in the below thread, please. Thank you:    Thank you I never want my PNGs to be interlaced. So I wish I could set a bunch of option defaults in the application so that I am saving time when outputting a lot of images as PNG over the course of a day working in Photoshop.  Does anyone know if this is possible in Photoshop without using Actions OR the Save-for-Web option? Increasing the maximum number of TCP/IP connections in Linux I am currently working on a project to create a (not prepaid) postage label.  In java, I would go about doing this by creating a bufferedimage and adding various other images to it to create what I want.  What I want is to put text, converted to an image, onto a template letter, to make a proper postage label.    For example, imagine I was given a document with blank spaces such as:  "Name: _________"  This document is in the form of an image, and I want to use apex and visualforce (the page is already constructed, I am just stuck at the image manipulation part) to add whatever name the user types in onto the image and pack it and email the new image.  The question I have here is: where do I even start?  Java is a little nicer when it comes to image manipulation, as far as I can see.  I've looked into using a web service and sending a soapxml request to return a proper encoded image, but I haven't found a web service that can do this.  Any pointers would be nice. Thanks. Ubuntu 14.04 slow wireless connection How to use a variable for a key in a JavaScript object literal? TV series from 70s or 80s - 1 female pilot was cloned from the other pilot's fingernail This was a tv show that aired in the US in the '70s or early '80s, possibly on Saturday mornings. Since I was a child, I'm assuming it was a kids program? It was comic science fiction and set on a spaceship. The only 3 specific details I remember are:   The crew traveled between ship levels by using open "jump tubes" that were similar to a giant vacuum tube message system, only without any "container" for the passenger. They just stepped into an alcove with a big hole in the floor and ceiling, then shot up or down. Frequently the show would use this as a source of slap-stick comedy.  The captain was male. The 2 pilots were female, and 1 had been cloned from the other's fingernail cell. They often disagreed about which one was the clone. As far as I understand, one of the main claimed problems with initializing e.g. a feed-forward neural network (with several $\text{tanh}$ or $\text{ReLU}$ layers) with $W=0$ is that it doesn't break "network symmetry", meaning, backpropagation would propagate the same error through all such units (i.e. "nudging all weights in the same direction"). This is, I presume, undesirable because we would not be learning "different" calculations through different paths of the network.  However, I'm confused why that even matters in this case given the fact that if $W$ ever drops to 0, we will effectively be propagating no gradients at all through the network, since W=0 would multiply all errors from the output and prevent any learning.  Put another way, even if $W=0$ does not break network symmetry (wasting calculations and paths in the network) is it correct to say that if $W=0$ (e.g. by initialization) we are effectively killing gradients in a neural network, and thus no learning can take place? A characterisation of quadratic extensions contained in cyclic extensions of degree 4 Let $D$ be a squarefree integer. I am trying to prove that $\mathbb Q[\sqrt D]$ is contained in a Galois extension of $\mathbb Q$ with Galois group $\mathbb Z/4$ if and only if $D$ is the sum of two squares, $D = a^2 + b^2$ with $a,b\in \mathbb Q$.   The hint in the exercise in Dummit and Foote suggests considering the extension $\mathbb Q[\sqrt{s + s\sqrt D}]$ for the forward direction. However, I am unsure how to show that this extension is Galois, much less that its Galois group is cyclic of order 4.   For the reverse direction, I expressed the given Galois extension as $\mathbb Q[\sqrt{a+b\sqrt D}]$ for some $a,b\in \mathbb Q$. I showed that this extension has $\mathbb Q[\sqrt{c^2 - d^2 D}]$ as a subfield for some $c,d \in \mathbb Q$. From this, I deduced that the $\sqrt D$ and $\sqrt{c^2 - d^2 D}$ generate the same extension, so $\sqrt D = x \sqrt{c^2 - d^2 D}$ for some $x$, and hence that $D = \frac{x^2 c^2}{1 + x^2 d^2} $. It seems that there should be a way to decompose this as a sum of two squares, but I did not see how.   I did not tag this as homework as I am studying it independently. How do you file a bug report for Windows? I have come across an issue that I feel is a  in Windows 7. What is the official process for submitting an issue to Microsoft from a consumers perspective as an end user of Windows? $\sin \frac{1}{x}$ is not uniformly continuous on $[1, \infty]$ How can I create documents in LaTeX using a calligraphic first letter for chapters? Non superscript citations for figures Is it possible to reference figures like so   taken from \emph{ref. \cite{reference}}   with non superscript numbers, while leaving the rest of the references in the bulk of the document untouched? This is using BibTeX and the . I'm using PostGIS 1.5.2, with geometries in SRID:900913. I need create a circles using a list of points as centre, with a radius of 600 kilometers. I'm using this query:  INSERT INTO circles (geom) (    SELECT ST_Buffer(point, 600000, 'quad_segs=8')     FROM points );   But circles created have not 600 kilometers of radius (radius is near this length, but not exactly).  Are there other methods to create circles in PostGIS?  NOTE: Information represented is from Spain. Correct projection is 4326, but client use Google rasters, so I am storing data in 900913 to avoid reprojections and increase performance. How to create a database directory structure for MySQL? How to edit `postgresql.conf` with pgAdmin 3? Which personal pronoun is appropriate in single-author papers - 'I' or 'we'? Could the use of 'I' be considered egotistical? Or will the use of 'we' be considered to be grammatically incorrect? Why does $F=ma$? Is there a straightforward reason? Why is force = mass $\times$ acceleration? I have searched in many sites but didn't actually get at it. Simply I want to know that if a mass in space moves (gains velocity thus further accelerates), how can I think, postulate and further believe that force = multiplication  of mass and its acceleration ? Constrain to any 2 axes during transform? I want to be able to lock my translation/scale operations to two axes at a time, say xy, xz or yz. It currently takes two operations (one for each axis).  Example, say for a cylinder, I would like to reduce the radius. I currently have to scale on the x axis first, then on the y axis, or I have to manually input the scale values in the object properties panel.  This option is easily accessible in 3dsmax via the axis constraints command bar. Or I can click the intersecting area between the 3d manipulator of the axes in question and move in that plane.