Why does the command ps not display the entire list of processes?












0















If the command ps awx is run the following output is produced. The list below is the last 20 lines of the complete output.



 4247 pts/1    Ss+    0:00 /bin/bash
4442 ? S< 0:00 [kworker/u17:1]
4661 ? S< 0:00 [kworker/u17:3]
4731 ? S< 0:00 [kworker/u17:5]
4734 ? S 0:00 pickup -l -t fifo -u
4847 ? S< 0:00 [kworker/u17:7]
4850 ? S 0:00 [kworker/u16:3]
4878 ? S 0:00 [kworker/u16:0]
5201 ? S< 0:00 [kworker/u17:8]
5353 ? S 0:00 [kworker/0:1]
5354 ? S 0:00 [kworker/7:2]
5355 ? S 0:00 [kworker/u16:2]
5361 ? S 0:00 [kworker/4:0]
5362 tty1 Ss 0:00 -bash
5396 ? S 0:00 [kworker/6:0]
5418 ? S 0:00 [kworker/0:0]
5420 ? S 0:00 [kworker/2:2]
5431 ? S 0:00 [kworker/7:0]
5562 ? S 0:00 [kworker/4:2]
5620 tty1 R+ 0:00 ps awx


If a subsequent command ps awx | grep grep is run the following output is generated.



5646 tty1     S+     0:00 grep --color=auto grep


Additionally if the following command ps awx | grep agetty is run, the following output is displayed.



5669 tty1     S+     0:00 grep --color=auto agetty


Why does the command ps awx not display the process identification numbers 5646 and 5669? In fact there are no other processes listed after 5620.









share



























    0















    If the command ps awx is run the following output is produced. The list below is the last 20 lines of the complete output.



     4247 pts/1    Ss+    0:00 /bin/bash
    4442 ? S< 0:00 [kworker/u17:1]
    4661 ? S< 0:00 [kworker/u17:3]
    4731 ? S< 0:00 [kworker/u17:5]
    4734 ? S 0:00 pickup -l -t fifo -u
    4847 ? S< 0:00 [kworker/u17:7]
    4850 ? S 0:00 [kworker/u16:3]
    4878 ? S 0:00 [kworker/u16:0]
    5201 ? S< 0:00 [kworker/u17:8]
    5353 ? S 0:00 [kworker/0:1]
    5354 ? S 0:00 [kworker/7:2]
    5355 ? S 0:00 [kworker/u16:2]
    5361 ? S 0:00 [kworker/4:0]
    5362 tty1 Ss 0:00 -bash
    5396 ? S 0:00 [kworker/6:0]
    5418 ? S 0:00 [kworker/0:0]
    5420 ? S 0:00 [kworker/2:2]
    5431 ? S 0:00 [kworker/7:0]
    5562 ? S 0:00 [kworker/4:2]
    5620 tty1 R+ 0:00 ps awx


    If a subsequent command ps awx | grep grep is run the following output is generated.



    5646 tty1     S+     0:00 grep --color=auto grep


    Additionally if the following command ps awx | grep agetty is run, the following output is displayed.



    5669 tty1     S+     0:00 grep --color=auto agetty


    Why does the command ps awx not display the process identification numbers 5646 and 5669? In fact there are no other processes listed after 5620.









    share

























      0












      0








      0








      If the command ps awx is run the following output is produced. The list below is the last 20 lines of the complete output.



       4247 pts/1    Ss+    0:00 /bin/bash
      4442 ? S< 0:00 [kworker/u17:1]
      4661 ? S< 0:00 [kworker/u17:3]
      4731 ? S< 0:00 [kworker/u17:5]
      4734 ? S 0:00 pickup -l -t fifo -u
      4847 ? S< 0:00 [kworker/u17:7]
      4850 ? S 0:00 [kworker/u16:3]
      4878 ? S 0:00 [kworker/u16:0]
      5201 ? S< 0:00 [kworker/u17:8]
      5353 ? S 0:00 [kworker/0:1]
      5354 ? S 0:00 [kworker/7:2]
      5355 ? S 0:00 [kworker/u16:2]
      5361 ? S 0:00 [kworker/4:0]
      5362 tty1 Ss 0:00 -bash
      5396 ? S 0:00 [kworker/6:0]
      5418 ? S 0:00 [kworker/0:0]
      5420 ? S 0:00 [kworker/2:2]
      5431 ? S 0:00 [kworker/7:0]
      5562 ? S 0:00 [kworker/4:2]
      5620 tty1 R+ 0:00 ps awx


      If a subsequent command ps awx | grep grep is run the following output is generated.



      5646 tty1     S+     0:00 grep --color=auto grep


      Additionally if the following command ps awx | grep agetty is run, the following output is displayed.



      5669 tty1     S+     0:00 grep --color=auto agetty


      Why does the command ps awx not display the process identification numbers 5646 and 5669? In fact there are no other processes listed after 5620.









      share














      If the command ps awx is run the following output is produced. The list below is the last 20 lines of the complete output.



       4247 pts/1    Ss+    0:00 /bin/bash
      4442 ? S< 0:00 [kworker/u17:1]
      4661 ? S< 0:00 [kworker/u17:3]
      4731 ? S< 0:00 [kworker/u17:5]
      4734 ? S 0:00 pickup -l -t fifo -u
      4847 ? S< 0:00 [kworker/u17:7]
      4850 ? S 0:00 [kworker/u16:3]
      4878 ? S 0:00 [kworker/u16:0]
      5201 ? S< 0:00 [kworker/u17:8]
      5353 ? S 0:00 [kworker/0:1]
      5354 ? S 0:00 [kworker/7:2]
      5355 ? S 0:00 [kworker/u16:2]
      5361 ? S 0:00 [kworker/4:0]
      5362 tty1 Ss 0:00 -bash
      5396 ? S 0:00 [kworker/6:0]
      5418 ? S 0:00 [kworker/0:0]
      5420 ? S 0:00 [kworker/2:2]
      5431 ? S 0:00 [kworker/7:0]
      5562 ? S 0:00 [kworker/4:2]
      5620 tty1 R+ 0:00 ps awx


      If a subsequent command ps awx | grep grep is run the following output is generated.



      5646 tty1     S+     0:00 grep --color=auto grep


      Additionally if the following command ps awx | grep agetty is run, the following output is displayed.



      5669 tty1     S+     0:00 grep --color=auto agetty


      Why does the command ps awx not display the process identification numbers 5646 and 5669? In fact there are no other processes listed after 5620.







      bash ps





      share












      share










      share



      share










      asked 2 mins ago









      MotivatedMotivated

      2098




      2098






















          0






          active

          oldest

          votes











          Your Answer








          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "106"
          };
          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: false,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: null,
          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%2funix.stackexchange.com%2fquestions%2f497128%2fwhy-does-the-command-ps-not-display-the-entire-list-of-processes%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown

























          0






          active

          oldest

          votes








          0






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes
















          draft saved

          draft discarded




















































          Thanks for contributing an answer to Unix & Linux Stack Exchange!


          • 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%2funix.stackexchange.com%2fquestions%2f497128%2fwhy-does-the-command-ps-not-display-the-entire-list-of-processes%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

          CARDNET

          Boot-repair Failure: Unable to locate package grub-common:i386

          濃尾地震