Trying to figure out what this means -> see image, any help is greatly appreciated!
What do the different colours in Ubuntu's ls command mean? For example, when I type the ls command in one of my folders, I get one of the files in light green, the other (which is a folder) in blue with green highlighting.   What do those colours mean, and there is any manual about all the colours?
Re-number a list when a new entry is inserted Interpretation of log transformed predictor and/or response I'm wondering if it makes a difference in interpretation whether only the dependent, both the dependent and independent, or only the independent variables are log transformed.  Consider the case of  log(DV) = Intercept + B1*IV + Error    I can interpret the IV as the percent increase but how does this change when I have   log(DV) = Intercept + B1*log(IV) + Error   or when I have   DV = Intercept + B1*log(IV) + Error   ? Apache accepting requests to other servers? I'm having problems with apache server (CentOS VPS at Amazon). When apache starts, it starts to receive hundreds of requests, this is an example of the log:  173.208.216.165 - - [25/Jan/2015:18:23:11 +0000] "GET http://go.padstm.com/resources/img/iebt.png HTTP/1.0" 200 36023 "http://go.padstm.com/?id=173374&amp;t=iframe&amp;var=33110" "Mozilla/5.0 (Windows; U; Windows NT 6.1; ru; rv:1.9.2.3) Gecko/20100401 Firefox/4.0 (.NET CLR 3.5.30729)"   The path /resources/img/iebt.png is in my server, but not go.padstm.com. The strangest thing is that apache is accepting all the requests.  Other example: in this case, the entire resource is NOT in my server, but apache returns 200:  198.204.239.250 - - [25/Jan/2015:19:04:39 +0000] "GET http://fstads.com/show.php?z=26&amp;pl=494&amp;j=1&amp;code=1422237874120 HTTP/1.0" 200 10819 "http://financezhen.com/?p=186#respond" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:2.2a1pre) Gecko/20110324 Firefox/4.2a1pre"   I don't know why these requests goes to my server, or why it returns 200...  Also, when apache starts and module prefork is enabled, it launches multiple httpd processes. If worker module is enabled, it launches multiple threads. Ok, but in both cases apache ends up consuming all the CPU and memory of the server, and there is not traffic directed to my server.  More info: ProxyRequests is Off. Also: I'm using ip-based vhosts:  NameVirtualHost xxx.xxx.xxx.xxx:80  &lt;VirtualHost xxx.xxx.xxx.xxx:80&gt;     ServerName mydomain.com     ServerAlias www.mydomain.com     DocumentRoot /var/www/html/w3prod     ServerAdmin admin@localhost     UseCanonicalName Off     CustomLog /var/log/httpd/w3prod.mydomain.com combined     ErrorLog /var/log/httpd/w3prod_error.mydomain.com &lt;/VirtualHost&gt; &lt;VirtualHost xxx.xxx.xxx.xxx:80&gt;     ServerName picfarm.mydomain.com     ServerAlias www.picfarm.mydomain.com     DocumentRoot /var/www/html/picfarm     ServerAdmin admin@localhost     UseCanonicalName Off     CustomLog /var/log/httpd/picfarm.mydomain.com combined     ErrorLog /var/log/httpd/picfarm_error.mydomain.com &lt;/VirtualHost&gt; &lt;VirtualHost xxx.xxx.xxx.xxx:80&gt;     ServerName test.mydomain.com     ServerAlias www.test.mydomain.com     DocumentRoot /var/www/html/engine-test     ServerAdmin admin@localhost     UseCanonicalName Off     CustomLog /var/log/httpd/test.mydomain.com combined     ErrorLog  /var/log/httpd/test_error.mydomain.com     ProxyRequests Off     ProxyPreserveHost On     &lt;Proxy *&gt;             Order deny,allow             Allow from all     &lt;/Proxy&gt;     ProxyPass /bosh http://xxx.xxx.xxx.xxx:7070/http-bind/     ProxyPassReverse /bosh http://xxx.xxx.xxx.xxx:7070/http-bind/     ProxyPass / http://xxx.xxx.xxx.xxx:8080/     ProxyPassReverse / http://xxx.xxx.xxx.xxx:8080/ &lt;/VirtualHost&gt;   Any help would be appreciated. Thanks! Suppose I have two tables that don't have many columns (3, for example). How can I position them side by side? Can someone help me out and explain or point me in the right direction on how to check video drivers and see if my video card running okay?  I had 10.04 installed on my Thinkpad r61 with Compiz Manager and life was great, until the machine took water damage. I bought an ASUS (X54H) since and am trying out 12.04, but the desktop just doesn't look right.  I always struggled with video driver installation. There are no proprietary drivers available in the hardware manager.  When I run lspci | grep VGA:  00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)   I will greatly appreciate your help. I want to use Linux more, but like I said video drivers appear to be my biggest concern. I have also tried 12.04 on my desktop PC, but again failed to configure video card, so switched back to Windows 7. How does the comma operator work in C++?  For instance, if I do:  a = b, c;     Does a end up equaling b or c?   (Yes, I know this is easy to test - just documenting on here for someone to find the answer quickly.)  Update:  This question has exposed a nuance when using the comma operator.  Just to document this:  a = b, c;    // a is set to the value of b!  a = (b, c);  // a is set to the value of c!   This question was actually inspired by a typo in code.  What was intended to be  a = b; c = d;   Turned into  a = b,    //  &lt;-  Note comma typo! c = d; I couldn’t find any proof on the internet. I would appreciate an elementary proof , but any help would be appreciated!  Thank you. I'm developing a  application, and I'm using constant NSStrings as ways to store key names for my preferences.  I understand this is a good idea because it allows easy changing of keys if necessary. Plus, it's the whole 'separate your data from your logic' notion.     Anyway, is there a good way to make these constants defined once for the whole application?     I'm sure that there's an easy and intelligent way, but right now my classes just redefine the ones they use. I bought my kids a PC and installed 12.04 (Unity) on it.  The bottom line is, I want my children to use the computer unsupervised while I have confidence they cannot access anything inappropriate.  What I have looked at:  I was looking at Scrubit a tool which allows me configure my wifi router to block content and this solution would also protect my other PC and mobile devices.  This may be overkill as I just want the solution to work on one PC.    I also did some Google searches and came across the application called .  My experience of OSS is that the best solutions frequently never appear first on a Google search list and in this case I need to trust the methods therefore my question is very specific.   I want to leverage your knowledge and experience to understand What is the best way to restrict adult content on 12.04 LTS as this is important to me.  It maybe a combination of things so please don't answer this question "try this or that", then give me some PPA unless you can share your experience of how good it is and of course if there are any constraints. I can print with printf as a hex or octal number.  Is there a format tag to print as binary, or arbitrary base? I am running gcc. printf(&quot;%d %x %o\n&quot;, 10, 10, 10); //prints &quot;10 A 12\n&quot; print(&quot;%b\n&quot;, 10); // prints &quot;%b\n&quot; Classes and lessons at Hogwarts are presumably scheduled at fixed times of day. The first class might start, for example at nine in the morning.  To be on time for one's lessons, it is therefore crucial to know the current time but we know that electric watches of course do not work at Hogwarts because of all the magical interference. Are there magic watches? Is there maybe a spell to tell the time?  How do people at Hogwarts usually tell the time? I am trying to work out how to get the value of table cell for each row using jQuery.  My table looks like this:  &lt;table id="mytable"&gt;   &lt;tr&gt;     &lt;th&gt;Customer Id&lt;/th&gt;     &lt;th&gt;Result&lt;/th&gt;   &lt;/tr&gt;   &lt;tr&gt;     &lt;td&gt;123&lt;/td&gt;     &lt;td&gt;&lt;/td&gt;   &lt;/tr&gt;   &lt;tr&gt;     &lt;td&gt;456&lt;/td&gt;     &lt;td&gt;&lt;/td&gt;   &lt;/tr&gt;   &lt;tr&gt;     &lt;td&gt;789&lt;/td&gt;     &lt;td&gt;&lt;/td&gt;   &lt;/tr&gt; &lt;/table&gt;   I basically want to loop through the table, and get the value of the Customer Id column for each row.  In the code below I have worked out that I need to do this to get it looping through each row, but I'm not sure how to get the value of the first cell in the row.  $('#mytable tr').each(function() {     var cutomerId =  } Double-blind review with four references in a row? I've read a lot of answers here about double-blind reviews and thesis or single articles.  My problem comes from having four self-references in my article. I feel that if I include them all, could be very easy to infer that this is the fifth one (It's a 4-year granted project and I have been collaborating in a number of software components inside a bigger architecture, now it's the time to use them all to interact with other applications) . But if I ommit some of them, I could end being accused of self-plagiarism. The other articles have been published in the proceedings of conferences that didn't require double-blind reviews, this is the first submission I make to a conference that asks for it (Maybe because of being CORE A) Also not worthless to mention that I'm going to send it as a short paper, so actually it'd be very helpful to cite rather than to repeat past texts.  What should I do? "Planar" graphs on Möbius strips I'm new to latex, I'm thankful if someone can give me an example script to customize TOC that looks like  Chapter 1.XXXXXX                                                            (1-15)  1.1 Introduction 1.2 xxxxxxxx 1.3 xxxxxxxxxx 1.4 xxxxxxx ...............  Chapter 2.xxxxxxx  2.1 xxxxx ......                                                           (16-30)  because the (default) TOC appears to be very large for my book, since it arranges the section name row-by-row. Are there infinitely-many numbers that are both square and triangular? I just started to read "Friendly Introduction to Number Theory" but I am getting stuck in the first exercises.     1.1. The first two numbers that are both squares and triangles are 1 and 36. Find the next one and, if possible, the one after that. Can   you figure out an efficient way to find triangular–square numbers? Do   you think that there are infinitely many?     I found how to find out the number which is both square and triangle. (don't know if this is effective way)    However how can I answer "Do you think that there are infinitely many?"? I think I need to find the formula but no idea yet. Can you please help me? Why don't electrons crash into the nuclei they "orbit"? I'm having trouble understanding the simple "planetary" model of the atom that I'm being taught in my basic chemistry course.   In particular,    I can't see how a negatively charged electron can stay in "orbit" around a positively charged nucleus. Even if the electron actually orbits the nucleus, wouldn't that orbit eventually decay?  I can't reconcile the rapidly moving electrons required by the planetary model with the way atoms are described as forming bonds. If electrons are zooming around in orbits, how do they suddenly "stop" to form bonds.     I understand that certain aspects of quantum mechanics  to address these problems, and that there are  of atoms. My question here is whether the planetary model itself addresses these concerns in some way (that I'm missing) and whether I'm right to be uncomfortable with it. What is the difference between a function decorated with  and one decorated with ? Possible Duplicate:          There are a lot of really screwed up configurations out there, because people didn't take a minute to sit down and think about something as simple as the name for their Active Directory forest. I'm asking this question to self-answer so that this knowledge can be more readily available. If you think you have a better answer, by all means add your input (but be prepared to defend it!)   So, what should I name my new Active Directory? Possible Duplicate:     Which one of these is correct?  It is I who am at fault. It is me who is at fault.  The word &quot;is&quot; is a conjugation of &quot;be&quot; which is a linking verb. I also want to know the same for 2nd person.  It is you who are at fault. It is you who is at fault.