Distinction between apt-cache and dpkg -l












3















I use apt-cache pkgname to retrieve the packages as 



me@host:~$ apt-cache pkgnames | wc -l

62803


get 62803 results



but 



me@host:~$ dpkg -l | wc -l

2336


What's the reasons which lead such a huge distinction. I presume that dpkg is super than apt.






package-management







share|improve this question



























    3















    I use apt-cache pkgname to retrieve the packages as 



    me@host:~$ apt-cache pkgnames | wc -l
    
62803


    get 62803 results



    but 



    me@host:~$ dpkg -l | wc -l
    
2336


    What's the reasons which lead such a huge distinction. I presume that dpkg is super than apt.






    package-management







    share|improve this question

























      3












      3








      3


      1






      I use apt-cache pkgname to retrieve the packages as 



      me@host:~$ apt-cache pkgnames | wc -l
      
62803


      get 62803 results



      but 



      me@host:~$ dpkg -l | wc -l
      
2336


      What's the reasons which lead such a huge distinction. I presume that dpkg is super than apt.






      package-management







      share|improve this question














      I use apt-cache pkgname to retrieve the packages as 



      me@host:~$ apt-cache pkgnames | wc -l
      
62803


      get 62803 results



      but 



      me@host:~$ dpkg -l | wc -l
      
2336


      What's the reasons which lead such a huge distinction. I presume that dpkg is super than apt.






      package-management




      package-management






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 2 hours ago









      AliceAlice

      450110




      450110






















          1 Answer
          1






          active

          oldest

          votes


















          3














          apt is for managing remote repositories, dpkg - for locally installed packages. They're related. apt is front end to dpkg. When you run apt-get install package it gets .deb file, and installs it via dpkg. So numbers differ because there's a lot of packages available, but only fraction is installed locally on your system.



          apt-cache can show both installed and non-installed packages, because it queries the apt cache - listing of what is available in remote repositories ( that cache is what you get when you do apt-get update). For instance,



          $ apt-cache policy terminator
          
terminator:
          
  Installed: (none)
          
  Candidate: 1.91-1
          

          

          
$ dpkg -l terminator
          
dpkg-query: no packages found matching terminator





          share|improve this answer

























            Your Answer








            StackExchange.ready(function() {
            var channelOptions = {
            tags: "".split(" "),
            id: "89"
            };
            initTagRenderer("".split(" "), "".split(" "), channelOptions);

            StackExchange.using("externalEditor", function() {
            // Have to fire editor after snippets, if snippets enabled
            if (StackExchange.settings.snippets.snippetsEnabled) {
            StackExchange.using("snippets", function() {
            createEditor();
            });
            }
            else {
            createEditor();
            }
            });

            function createEditor() {
            StackExchange.prepareEditor({
            heartbeatType: 'answer',
            autoActivateHeartbeat: false,
            convertImagesToLinks: true,
            noModals: true,
            showLowRepImageUploadWarning: true,
            reputationToPostImages: 10,
            bindNavPrevention: true,
            postfix: "",
            imageUploader: {
            brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
            contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
            allowUrls: true
            },
            onDemand: true,
            discardSelector: ".discard-answer"
            ,immediatelyShowMarkdownHelp:true
            });


            }
            });














            draft saved

            draft discarded


















            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1124914%2fdistinction-between-apt-cache-and-dpkg-l%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown

























            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            3














            apt is for managing remote repositories, dpkg - for locally installed packages. They're related. apt is front end to dpkg. When you run apt-get install package it gets .deb file, and installs it via dpkg. So numbers differ because there's a lot of packages available, but only fraction is installed locally on your system.



            apt-cache can show both installed and non-installed packages, because it queries the apt cache - listing of what is available in remote repositories ( that cache is what you get when you do apt-get update). For instance,



            $ apt-cache policy terminator
            
terminator:
            
  Installed: (none)
            
  Candidate: 1.91-1
            

            

            
$ dpkg -l terminator
            
dpkg-query: no packages found matching terminator





            share|improve this answer






























              3














              apt is for managing remote repositories, dpkg - for locally installed packages. They're related. apt is front end to dpkg. When you run apt-get install package it gets .deb file, and installs it via dpkg. So numbers differ because there's a lot of packages available, but only fraction is installed locally on your system.



              apt-cache can show both installed and non-installed packages, because it queries the apt cache - listing of what is available in remote repositories ( that cache is what you get when you do apt-get update). For instance,



              $ apt-cache policy terminator
              
terminator:
              
  Installed: (none)
              
  Candidate: 1.91-1
              

              

              
$ dpkg -l terminator
              
dpkg-query: no packages found matching terminator





              share|improve this answer




























                3












                3








                3







                apt is for managing remote repositories, dpkg - for locally installed packages. They're related. apt is front end to dpkg. When you run apt-get install package it gets .deb file, and installs it via dpkg. So numbers differ because there's a lot of packages available, but only fraction is installed locally on your system.



                apt-cache can show both installed and non-installed packages, because it queries the apt cache - listing of what is available in remote repositories ( that cache is what you get when you do apt-get update). For instance,



                $ apt-cache policy terminator
                
terminator:
                
  Installed: (none)
                
  Candidate: 1.91-1
                

                

                
$ dpkg -l terminator
                
dpkg-query: no packages found matching terminator





                share|improve this answer















                apt is for managing remote repositories, dpkg - for locally installed packages. They're related. apt is front end to dpkg. When you run apt-get install package it gets .deb file, and installs it via dpkg. So numbers differ because there's a lot of packages available, but only fraction is installed locally on your system.



                apt-cache can show both installed and non-installed packages, because it queries the apt cache - listing of what is available in remote repositories ( that cache is what you get when you do apt-get update). For instance,



                $ apt-cache policy terminator
                
terminator:
                
  Installed: (none)
                
  Candidate: 1.91-1
                

                

                
$ dpkg -l terminator
                
dpkg-query: no packages found matching terminator






                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited 2 hours ago

























                answered 2 hours ago









                Sergiy KolodyazhnyySergiy Kolodyazhnyy

                74k9154323




                74k9154323






























                    draft saved

                    draft discarded




















































                    Thanks for contributing an answer to Ask Ubuntu!


                    • Please be sure to answer the question. Provide details and share your research!

                    But avoid …



                    • Asking for help, clarification, or responding to other answers.

                    • Making statements based on opinion; back them up with references or personal experience.


                    To learn more, see our tips on writing great answers.




                    draft saved


                    draft discarded














                    StackExchange.ready(
                    function () {
                    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1124914%2fdistinction-between-apt-cache-and-dpkg-l%23new-answer', 'question_page');
                    }
                    );

                    Post as a guest















                    Required, but never shown





















































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown

































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown







                    -

                    Popular posts from this blog

                    A CLEAN and SIMPLE way to add appendices to Table of Contents and bookmarks

                    Image
                    0 I found a lot of questions abount appendices and ToC. Many users want appendices to be grouped in an Appendix part, however some problems arise with ToC, hyperref, PDF viewer bookmarks, and so on. There are different solutions which require extra packages, command patching and other extra code, however none of them satisfies me. I almost found an easy way to accomplish a good result, where appendices are added to bookmarks in the right way and hyperref links point to the right page. However, the number of the "Appendix" part page is wrong (it's the number of appendix A). Is there any EASY way to fix that? This is a MWE: documentclass{book} usepackage[nottoc,notlot,notlof]{tocbibind} usepackage{hyperref} begin{document} frontmatter tableofcontents mainmatter part{First} chapter{...
                    Read more

                    Calculate evaluation metrics using cross_val_predict sklearn

                    Image
                    1 In the sklearn.model_selection.cross_val_predict page it is stated: Generate cross-validated estimates for each input data point. It is not appropriate to pass these predictions into an evaluation metric. Can someone explain what does it mean? If this gives estimate of Y (y prediction) for every Y (true Y), why can't I calculate metrics such as RMSE or coefficient of determination using these results? python scikit-learn cross-validation share | improve this question edited Nov 28 '18 at 17:52 desertnaut 20.3k 7 43 79 ...
                    Read more

                    Insert data from modal to MySQL (multiple modal on website)

                    Image
                    0 I have problem with inserting data to MySQL from modal. My modal: <a href="#" class="badge badge-pill badge-success">6 komentarzy</a> <a href="#" class="badge badge-pill badge-danger">brak komentarzy</a> <a data-toggle="modal" href="#add_desk_comm_{$desk_['desk_id']}" data-target="#add_desk_comm_{$desk_['desk_id']}" class="ediiit">(dodaj)</a> <div class="modal fade" id="add_desk_comm_{$desk_['desk_id']}" tabindex="-1" role="dialog" aria-labelledby="edit_printer" aria-hidden="true"> <div class="modal-dialog" role="document"> ...
                    Read more