Icons not showing up after searching in the search box in my desktop Ubuntu 20.04 LTS. How can we resolve this easily?
My Applications are not showing after upgrading from Ubuntu 18.04 to 20.04
Does ClamAV Scan Windows virus? I'm new to Ubuntu.  I'm now setting up an OwnCloud server which supports ClamAV file scan.  Since most of the users connected to the server uses Windows OS, can ClamAV scan for Windows virus?  I also did some research that such as BitDefender. It clams that it scans real time, if someone upload files to the server, will BitDefender scan the file even OwnCloud doesn't support?  By the way, I heard that if I update the system frequently, I don't have to install any antivirus that scan for Linux virus. Is that right? $L^p$ and $L^q$ space inclusion Let $(X, \mathcal B, m)$ be a measure space.  For $1 \leq p &lt; q \leq \infty$, under what condition is it true that $L^q(X, \mathcal B, m) \subset L^p(X, \mathcal B, m)$ and what is a counterexample in the case the condition is not satisfied? How to find application's path from command line? For example, I have git installed on my system. But I don't remember where I installed it, so which command is fit to find this out? Are if else statement equivalent to logical and && or || and where should I prefer one over the other? I'm learning about decision making structures and I came across these codes:  if [ -f ./myfile ] then      cat ./myfile else      cat /home/user/myfile fi   [ -f ./myfile ] &amp;&amp; cat ./myfile || cat /home/user/myfile   Both of them behave the same. Are there any advantages to using one way from the other? How do I delete multiple rows in Entity Framework (without foreach) I am using a logit model. My dependent variable is binary. However I have an independent variable which is categorical and contains the responses: 1.very good, 2.good, 3.average, 4.poor and 5.very poor. So, it is ordinal ("quantitative categorical"). I am not sure how to handle this in the model. I am using gretl.  [Note from @ttnphns: Although the question says the model is logit (because the dependent is categorical), the crucial issue - ordinal independent variables - is basically alike, be the dependent categorical or quantitative. Therefore the question is equally relevant to, say, linear regression too - as it is to logistic regression or other logit model.] Why and how is the  of a matrix in $M_3(\mathbb C)$ fully determined by its characteristic and minimal polynomials? And why does it fail for $n &gt;3$?   Thanks. How do you run as a different user from the Start Menu in Windows 10? Running an application as a different user (e.g. domain admin account) from the start menu (by shift + right-clicking the application) used to be an option in Windows 7 &amp; XP.  However, I can't find that option in Windows 10. The workaround seems to be either 1) to find the application in Windows Explorer (shift + right-click) or 2) use runas.exe from the command line.  However, in order to use those workarounds, I have look up the executable name first. It's a bit difficult because I don't have the name of every RSAT tool or executable name memorized.  (e.g. "Active Directory Users and Computers" is dsa.msc, "Routing and Remote Acces" is rrasmgmt.msc)  Is there a simpler way to do this? How to Uninstall Blender Software I installed Blender for a project working on and it's way more than I need. I'd like to uninstall it, but can't figure out how to do so. It's not showing up in Programs (using Windows 9) and I can't find instructions on how to remove it in the Blender documentation. Any assistance would be greatly appreciated. Thanks. A user has asked  which did not receive much attention, and thus the user deleted the post. After some time, the user asked the  (with just slight changes to the title and a tag change), so that it could receive a bit more attention. The strange thing is that the question was not downvoted or poorly written, and yet the user deleted the original post. Now, since the original question was deleted, I could not mark the new one as a duplicate (it threw an error). My question is, how do we handle such questions? Just let them be as such or let the user know about it or is there another way to handle such situations? FaceTime and iMessage - an error occurred during activation I couldn't log in to FaceTime so I did a factory reset of my MacBook. It worked for a brief period of time and then suddenly it just logged out.  I believe it might have been after iCloud synced with keychain or after I changed my local host name and computer name.  I have seen other users facing this issue but no solutions. Is there a troubleshooting guide or should I just contact Apple support since I can't use their service without activation to my Mac? reason for exec in wrapper scripts I am testing against the following test document:  &lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"                        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;    &lt;head&gt;         &lt;title&gt;hi there&lt;/title&gt;     &lt;/head&gt;     &lt;body&gt;         &lt;img class="foo" src="bar.png"/&gt;     &lt;/body&gt; &lt;/html&gt;   If I parse the document using lxml.html, I can get the IMG with an xpath just fine:  &gt;&gt;&gt; root = lxml.html.fromstring(doc) &gt;&gt;&gt; root.xpath("//img") [&lt;Element img at 1879e30&gt;]   However, if I parse the document as XML and try to get the IMG tag, I get an empty result:  &gt;&gt;&gt; tree = etree.parse(StringIO(doc)) &gt;&gt;&gt; tree.getroot().xpath("//img") []   I can navigate to the element directly:  &gt;&gt;&gt; tree.getroot().getchildren()[1].getchildren()[0] &lt;Element {http://www.w3.org/1999/xhtml}img at f56810&gt;   But of course that doesn't help me process arbitrary documents.  I would also expect to be able to query etree to get an xpath expression that will directly identify this element, which, technically I can do:  &gt;&gt;&gt; tree.getpath(tree.getroot().getchildren()[1].getchildren()[0]) '/*/*[2]/*' &gt;&gt;&gt; tree.getroot().xpath('/*/*[2]/*') [&lt;Element {http://www.w3.org/1999/xhtml}img at fa1750&gt;]   But that xpath is, again, obviously not useful for parsing arbitrary documents.  Obviously I am missing some key issue here, but I don't know what it is.  My best guess is that it has something to do with namespaces but the only namespace defined is the default and I don't know what else I might need to consider in regards to namespaces.  So, what am I missing? What features of Mavericks are beneficial to you? This question serves to share and collect the enhancements that make a large difference to how you use your Mac.   Please post one feature per answer. Please also check to see if your answer has already been posted - duplicate answers will be deleted. To search answers for this question use  (directly from the question page) in addition to your search terms in the search box in the upper right hand corner of this page.  The best answers will not only list a feature, but provide details on how to configure that feature, and provide an image of how to use the feature to be more efficient or effective with Mavericks. Problem requiring/including plugin files with plugin_dir_path( __FILE__ ) I am trying to write a WordPress plug-in. In my project I have three PHP files.   My plug-in file Widget for the plug-in Data installation   I need to install data table on plug-in activation. For that sake I wrote code to create table for my plug-in in data installation file. But I am not able to create data table using this file.  My code for include data installation file and widget file in my plug-in file is  define ( 'OTHER_FILES_PATH', plugin_dir_path( __FILE__ ) ); require_once( OTHER_FILES_PATH . '/data_installation.php' ); require_once( OTHER_FILES_PATH . '/plugin_widget.php' );   My problem is when I put my data installation code in my plug-in file it's working fine but when I put it in separate file (data installation) I am unable to create tables for my plug-in.  Please let me know if I am making any mistake. Hook into the loop via a plugin, and output something after every X post? I have a plugin where I want to output ads after X number of posts on the home page. The home page is step 1, but things like archives should be possible too once I get the code for the home page.  How do I hook in to post loops and say something like "after every loop, increment a counter, and then if the counter = my number, output an ad". I can write all the logic for this code myself, but where to hook/implement my code is confusing. Is an empty set equal to another empty set? Indentation shortcuts in Visual Studio Why is my variable local in one 'while read' loop, but not in another seemingly similar loop? From some comments in the answers for  (now deleted, 10k only), there's confusion around the usage of I vs. me:  While the sentence, "the other attendees are myself and Steve," is agreed to be incorrect, there's confusion about whether the correct form is "the other attendees are me and Steve" or "the other attendees are Steve and I."  (I've always used the heuristic of removing the other people from the sentence, so I always thought "the other attendee is me" would be correct, instead of "the other attendee is I." Is this true, or am I using a flawed heuristic?)