When I run sudo apt-get update I get four Hash Sum mismatch errors:  W: Failed to fetch http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/main/binary-amd64/Packages  Hash Sum mismatch     W: Failed to fetch http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/binary-amd64/Packages  Hash Sum mismatch     W: Failed to fetch http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/main/binary-i386/Packages  Hash Sum mismatch     W: Failed to fetch http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/binary-i386/Packages  Hash Sum mismatch   I tried fixing this with   sudo rm /var/lib/apt/lists/* -vf sudo apt-get update    but that didn't work and neither did  sudo apt-get clean sudo apt-get update   or  sudo apt-get dist-upgrade sudo apt-get update   Is there any other way I can try to fix this?
When I check for updates, I get a "Failed To Download Repository Information" error.   This is what comes up under details:   W: Failed to fetch gzip:/var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_natty_main_source_Sources  Hash Sum mismatch,  E: Some index files failed to download. They have been ignored, or old ones used instead.
Why do we have more male infants born? Where can I check which difficulty bracket I'm in? Supposedly DOTA 2 matchmaking is divided into brackets.  I want to know which difficulty bracket I'm in. How can I find this information? I am trying to boot Ubuntu on my computer.  When I boot Ubuntu, it boots to a black screen.  How can I fix this? Table of Contents: How do I bake chocolate chip cookies like Subway? I want a chocolate chip cookie like the ones Subway has. Those cookies have a smooth top and chewy texture.  I have a recipe for 3/4 cup fat, 0.5 cup sugar 0,5 cup brown sugar, 3/4 cup flour, 1 egg, 2 tsp extract. I get a semi stiff dough, but also an airy cookie, not as dense like Subway. I use room temperature margarine.  I have tried to bake cookies with 2 eggs and with 1 egg, but they always come out wrinkly on top, not as stiff. Is it possible that using an egg and a yolk would work? (But wouldn't that waste a lot of whites if that's how they do it?)  I think as part of this I want a stiff dough, that'll leave the bowl clean, to minimize spread and keep the tops from getting wrinkly as stiffness will keep the the cookies from expanding and contracting. Is that true? If so, I'm afraid that if I add more flour to stiffen the dough will make the cookies cakey - is that the case? How would I avoid that? What is this mark over the question When I open a site I see a mark over a question.See screen shot.  When I open the question mark is not remove.It still appear.    is this bug or? Why with two classes, LDA gives only one dimension? I am working with dimensionality reduction algorithms. Linear Discriminant Analysis (LDA) is a supervised algorithm that takes into account the class label (which is not the case of PCA for example). I am using Python to do a comparative study between some algorithms.  Why with two classes (k = 2), regardless of the data dimensionality, LDA gives one dimension, i.e. the new subspace is composed of only one dimension? For example if I try to project my dataset (of 100 attributes and 2 classes) to 10-dimensional space by using LDA(n_components=10) I only obtain 1 dimension?  For k&gt;2 I can obtain the number of discriminant vectors that I specified as n_components. How can I get n_components dimensions for k=2? So I need to find the Convergence Radius and Convergence Domain of the complex power series: $\sum\limits_{n=0}^\infty \frac{1}{2^{n}} z^{2^n}$  I've tried looking at the individual parts of the series and rewriting it somehow but couldn't find a way.  It can probably be solved, after a step or two, by the formula $R=\frac{1}{\displaystyle\limsup_{n\rightarrow \infty}\sqrt[n]{|a_n|}}$ .  Thanks. Practice problem for exam:     Let ${A_n}$ satisfy $\sum\limits_{n=1}^\infty P(A_n \cap A^c_{n+1}) &lt; \infty$ and $\lim\limits_{n\to \infty} P(A_n) = 0$.  Show that $P(\lim \sup A_n) = 0$.    I can see that it is sufficient to show that $P\left(\sum\limits_{n=1}^\infty A_n\right) &lt; \infty$ and then apply the Borel-Cantelli lemma, but I am having trouble showing this from the information given.  I see an almost identical problem here: , however the hint there is not enough for me to make headway, and this problem is also different in which term gets the complement inside the first sum. Automatically show connected mass storage devices on Windows desktop Find orphaned users In SQL Server 2005, is there a way to find users that either don't exist at the server level (an account that was deleted at server level but wasn't disassociated from databases before it was deleted) or accounts that aren't linked (an account may have been deleted at the server level but not db level, then readded but the db level was never cleaned up).  I've got a very messy server and it would be awesome if there was a query to run to find these. Use of "save" or "save for" in sentences After offering a bounty to , I realize that I cannot comment on the question because I no longer have the required reputation. Is it possible to change this behavior, so that the bounty owner can comment only on the post with the bounty irrespective of their reputation? While bounty owners are told that they'll lose privileges at the time they place a bounty, it makes sense to allow them to interact with potential answerers/commentators to help solve the problem, or at least provide additional information. “community wiki” checkbox in new question shows a dialog twice when self-answering Click Answer your own question Check community wiki A dialog box     Are you sure you want to make this post Community Wiki?   will appear, Click OK or Cancel; The same dialog will appear again.   Google Chrome 44.0.2403.107 / Windows8.1 / site rev 2015.7.25.3609 Wireless USB Adapter 0bda:c811 Realtek Semiconductor Corp How do I modify my PATH so that the changes are available in every Terminal session I want to add a directory to search my search path. I know I have to modify the PATH environment variable. However, I want the change to be permanent, so that it is always in effect, for every Terminal (bash) window I open.  There is an overload of confusing and possibly conflicting information in   I am using Ubuntu 10.04. Suppose I want to add /usr/local/foo to my PATH. Which file (.bashrc, .profile, .bash_login, etc...) should I modify and what should the new line(s) look like? Why are Bitmap-Fonts used automatically? Travelling without a visa after passport was stolen How do you handle uneven tiles while rendering a tile map? Here is what I want to do with my tile map that I am unsure of. As you can see the top walls are way larger then the bottom and side ones (this is also an issue with my corners which are odd shapes [more like an L then a square] as well as larger then the 40x40px that my current tiles are).    I have also attached the tile sheet I am using for the tiles to show you what the corners and tops look like compared to the rest of the tiles.  What I’m thinking is I might be able to just draw them using the same array I have if I use the tiles width and height instead of a set WxH? I dont know how well this will work, but were the blocks that will have different values will be blocks the player/NPCs can’t step on then it may not be an issue, again I’m not even sure if that is a viable solution.  My code in case you want to see how I'm currently handling it:  (pastebin) (edit:im not handling it, meant how I'm currently doing the map)  tl;dr - how can I take take my 2d looking tile map and change it to have different size tiles? or is there a better way to do what I am trying to do? Is there a name of a method that I should be looking for while googling? Is there a way to find comments you made on YouTube? Electric potential is related to Electric Field by negative integral of Field with distance.If charges move away from the positive terminal (Assuming conventional flow) why is there no drop in electric potential even though the charges are moving in the direction of electric field?  Some of the answers I read for the similar question said that the electrons in wires rearrange themselves in a way to make the electric field uniform in the wire.However,this doesn’t explain the absence of potential drop in the wires (due to electric field) since the field is still there.