I had to reinstall my OS.  One the most deseagreable part is to reinstall the softwares in it (mongo, eclipse, and so on). That's why I want to know if I can make a partition dedicated to softwares? And will it be efficient? I mean, in default installation, there are many files that go to /ect, /bin, in the root system actually.  So, if I had to reinstall my OS once again; or other case change for Kubuntu, Xubuntu; will I have to reinstall the softwares anyway? Because it will be dependent of /etc's files in the root, or it will have a "parallel" system organisations with binaries files in the softwares dedicated partition?
Not packages and not all applications. Just the applications user installed by himself from whatever source (Software Center, manually added PPA, etc.). If the above is not possible - a list of all installed applications or at least a GUI which lists the applications so I can take screenshots of it.  I've read a dozen of similar questions and people posting answers usually don't even get close to OP question merit. Please note that my question includes 'user installed'.   Answer: It is not currently possible in Ubuntu Linux.  (choosing tijybba's answer as the closest one though)
On all of the other SOFU sites a downvote means The question is unclear or not useful.  However, here on meta, a downvote has become a sign of I don't agree with the question, suggestion, feature request, bug, etc. being described in the question.   What does a downvote on Meta really mean? What other reasons do people downvote on Meta? Why is it okay for meta to redefine the meaning of the downvote?  The tooltips and instructions are all the same here on meta.   Note: I'm not saying I disagree with the practice, just curious. $$\tan(\theta_1+\theta_2+\cdots+\theta_n)=\frac{S_1-S_3+S_5+\cdots}{1-S_2+S_4+\cdots}$$  where  $S_i$ denotes the sum of product of tangent of angles taken $i$ at a time.     For example,$$\tan(\theta_1+\theta_2)=\frac{S_1}{1-S_2}=\frac{\tan\theta_1+\tan\theta_2} {1-\tan\theta_1\tan\theta_2}$$   (This formula is given  in my textbook with no derivation or background)  How to derive this? SObject row was retrieved via SOQL without querying the requested field on Contact.Account I am getting this error:     SObject row was retrieved via SOQL without querying the requested   field: Contact.Account   Controller:  public class WrapperAccountCtrl {      public List&lt;Account&gt; acclist{get;set;}     public List&lt;Contact&gt; conlist{get;set;}      public List&lt;MyWrapper&gt; wap{get;set;}      public WrapperAccountCtrl()      {         acclist=[Select id,name from Account];          conlist=[Select id,name,AccountID  from contact where AccountID IN:acclist];          system.debug('Size----'+conlist.size());           wap=new List&lt;MyWrapper&gt;();           for(integer i=0;i&lt;acclist.size();i++)          {              wap.add(new MyWrapper(conlist,acclist[i]));          }     }      public class MyWrapper     {          public Account accn{get;set;}          public List&lt;Contact&gt;conrec{get;set;}          public MyWrapper(List&lt;Contact&gt; con,Account acc)         {             accn=acc;             conrec=con;             }     } }   VF Page:  &lt;apex:page controller="WrapperAccountCtrl" sidebar="false"&gt;       &lt;apex:form &gt;          &lt;apex:pageBlock &gt;              &lt;apex:pageBlockTable value="{!conlist}" var="c"&gt;                  &lt;apex:column value="{!c.account.Name}"/&gt;              &lt;/apex:pageBlockTable&gt;          &lt;/apex:pageBlock&gt;      &lt;/apex:form&gt;  &lt;/apex:page&gt; How are private keys handed to users in Identity-based Encryption? Whenever my cheese gets too old and has a bit of blue/white mold on the side, I'm not sure whether I should throw it completely out or not. Is it safe to eat if I cut off the edge? Should I cut a bit off of all the sides just to be safe?  I'm particularly interested in the answer for cheddar cheese, but answers about other cheese are welcome. Is it correct to say "I write children books" (not possessive case)? Although Children's books is what everybody says, I would like to understand why the genitive case is applied in such case.  If I write books for children, children is an adjective here; not the owners of my book! The word "children" just defines or characterizes the type of books I write. Therefore, it's an adjective.   So, I understand that genitive/possessive case ("I write children's book")  is incorrect grammar.  My question is: is the genitive case here really accepted as right? If I use "I write children books" (following the grammar principle) as as I say "I write pets books" (books about pets, and not possessions of pets) - would I be incorrect? Why? Do I need a Japanese transit visa when arriving at Narita and departing from Haneda? I'm arriving from New Delhi, India (Indian passport) with JAL at Narita on 11th July at 07:30 and departing for San Francisco with JAL at 00:05 on 12th July from Haneda. Do I need a transit visa as I'll be switching airports and spending a few hours at JAL City Haneda Airport Hotel?  Previously I had connecting flights from Narita to San Francisco and obtained shore passes to relax at Narita Nikko Hotel. Now I'm travelling with my elderly Mom and do not want complications at Narita immigration or later in the day while going from Narita Airport to Haneda airport. Please advise. My mom has an android tablet and she doesn't even know what a site is, her e-mail, or even the password of her facebook account. She's an average user. The internet is facebook in her eyes. She has no need for apps or anything, it's just, only, precisely facebook. All is facebook.  How can I completely disable installing apps in android so they can't be installed in any way or form, I mean, not by URL, not by clicking, not by app store, not even by another program. Just disable the entire thing altogether.  Doesn't need to be safe, have locks, passwords etc. I'm not trying to secure the device from intruders, attackers or robbers, I'm trying to secure it from its very own user.  Please help. I just had to remove two anti-virus apps that were opening adware pages when she tried to open facebook lite, and that's obviously a no-go, apps which she "had not installed." Clearly there's some voodoo going on here for them to just popup, or maybe she just did it unknowingly, but none of that's relevant. How can you just disable installs so this couldn't ever happen again? Probability of rolling 3 mutually exclusive dice What should be the intuition when working with compactness? I have a question that may be regarded by many as duplicate since there's a  one at MathOverflow. The point is that I think I'm not really getting the idea on compactness. I mean, in $\mathbb{R}^n$ the compact sets are those that are closed and bounded, however the guy who answered this question and had his answer accepted says that compactness is some analogue of finiteness. That's the first problem: In my intuitive view of finiteness, only boundedness would suffice to say that a certain subset of $\mathbb{R}^n$ is in some sense &quot;finite&quot;. On the other hand there's the other definition of compactness (in terms of covers) which is the one I really need to work with and I cannot see how that definition implies this intuition on finiteness. Also, I feel it's pretty strange the covers people use when they want to deal with compact sets. To prove a set is compact I know they must show that for every open cover there's a finite subcover; the problem is that I can't see intuitively how one could show this for every cover. Also when trying to disprove compactness the books I've read start presenting strange covers that I would have never thought about. I think my real problem is that I didn't yet get the intuition on compactness. So, what intuition should we have about compact sets in general and how should we really put this definition to use? Can someone provide some reference that shows how to understand the process of proving (and disproving) compactness? How can I install Celestia on Ubuntu 18.04.1? Like the title said, I want to install Celestia. I already downloaded the packages  and then, I tried all the things that I found on some posts (also, they're outdated, cause the last one is for Ubuntu 16.04) but nothing works.  How can I install it on Ubuntu 18.04.1? CSV for Excel, Including Both Leading Zeros and Commas let's say that I have a following file structure:  ~/DIR1 -fileA -DIR2 --fileB   Then, being in ~, I run this script:  cp DIR1 NEWDIR2   And just an error happens:  cp: omitting directory ‘DIR1’   I understand why nothing from DIR1 gets copied (because I didn't use -r switch that would enforce recursion) but I'd expect the DIR1 folder itself copied to NEWDIR2 (so practically a creation of a new "NEWDIR2" in ~ or a creation of ~/NEWDIR2/DIR1).  Could someone explain to me why is my expectation wrong? By accident, I recently removed some videos from my phone. I tried to restoring them with Recuva and TuneUp Utilities and the results were "undf" files.  I tried to open with VLC, Media Player Classic and other video players to no avail. Where/how do I find out the codec for these files?   I would really love to be able to watch these videos again. Importing shapefile into AutoCAD Map 3D? I'm trying to import shapefiles into a DWG using diferent layers names and during my web search I found this post. I know you did this 2 years ago but my problem is very similar and I wonder if you could help me.  Basically I've got a shapefiles of pipelines and I want to use the attribute name to sort the features into different CAD levels in teh same layer. I tried the import and although soem people say that "you can set the import to use data field" I can't see any option to do it and I'm really struggling. Any help appreciated.  I'm running on AutoCAD Map 3D 2010. Inbox notification and reputation score is misaligned in mobile web view The inbox notification indicator and reputation score indicator are misaligned in the mobile web view. Predicator vs. Predicate BACKGROUND According to Oxford Dictionaries Online:   means &quot;(In systemic grammar) a verb phrase considered as a constituent of clause structure, along with subject, object, and adjunct.&quot;  means &quot;The part of a sentence or clause containing a verb and stating something about the subject (e.g. went home in John went home).&quot;  In the latter example of John went home, it seems, the predicate is went home whereas the predicator is went, home being an adjunct and thus not part of the predicator as defined. Now, I looked further in  to better understand the difference. The article recognizes two competing notions of the predicate in theories of grammar:  (1) Predicates in traditional grammar (e.g., went home in John went home) (2) Predicates in modern theories of syntax and grammar (e.g., went in John went home)  Which, according to the article, causes confusion as to what exactly the term predicate mean, and some grammarians came up with a new term &quot;predicator&quot; specifically for use (2), says the article. No problem thus far. What bothers me: The article in its explanation of (2) says, &quot;Other function words -- e.g. auxiliary verbs, certain prepositions, phrasal particles, etc. -- are viewed as part of the predicate.&quot; (Emphasis mine.) Now, remember this definition of the predicate, i.e., (2) above, corresponds to the new term &quot;predicator&quot;. I understand that auxiliary verbs are part of this definition of predicate, because an auxiliary verb can be part of a verb cluster. But can certain prepositions and phrasal particles also? The article has these example sentences (Words belonging to &quot;predicate&quot; (2) are boldfaced as in the article itself; My comments in parentheses.):  The butter is in the drawer. (preposition in being part of the predicate) You should give it up. (particle up being part of the predicate) Susan is pulling your leg. (I don't know why leg is marked as part of the predicate. Maybe a typo?)  QUESTION Except for the last one, which I suspect is a typo, I'd like to know whether the preposition in and the particle up belong to the predicate as presented in (2) and thus belong to the new term &quot;predicator&quot;. Reference for the subgroup structure of $\rm{PSL}_2(q)$ I’m building a battery powered data logger with a microcontroller and several sensors. I’d like to measure the supply current of individual parts with idle currents in the μA range and peak currents in the low mA range. The current is not constant which rules out a simple multimeter.  Usually I’d (temporarily) replace ferrite beads on the PCB with a 10Ω resistor and measure the voltage drop with my DS1104Z oscilloscope. However, the voltage drop of some μV for 1 or 2 μA of current is simply drowning in the noise and peak currents of ~10mA already result in a noticeable supply drop (so increasing the resistance is out of the question).  I was thinking about building a small board with a 5Ω resistor and OPAMP set to something like 100x amplification, but first wanted to know if this is a good idea or if you know of any affordable, ready-made solutions. Obviously the bandwidth doesn’t have to be high, but some accuracy would be desirable.  Thanks in advance.  Michael We all know that Superman changes in the phone booth. But where does he put his regular clothes while he's on a mission? He doesn't throw it out, because he changes back. But we don't see him carrying a bag of dirty laundry while he's on a mission.  ("In his right hand, Superman has Lois Lane, and in his left hand he seems to be holding... boxers??)  And I can't imagine he leaves it in the phone booth.  So where does Superman leave his regular clothes after he changes?