Bash Script Case statement (if not logic)












0















I wrote a small bash script, where it will try to find a word ERROR, if found resulting value will be non-zero variable numeric (for example, 25 I mentioned in the script but it is variable numeric value) and if not found, it will be 0.



My problem is, I want to use Case statement such as if output is not zero, only then execute this particular command



truncate -s 0 /root/test/wayfile.log && screen -X -S wowow quit &


script here



#! /bin/bash

case "$(grep ERROR /root/test/wayfile.log | wc -w)" in

25) echo "empty log file and kill screen: $(date)" >> /var/log/finderror.txt
truncate -s 0 /root/test/wayfile.log && screen -X -S wowow quit &
;;
0) # all ok
;;
esac








share



























    0















    I wrote a small bash script, where it will try to find a word ERROR, if found resulting value will be non-zero variable numeric (for example, 25 I mentioned in the script but it is variable numeric value) and if not found, it will be 0.



    My problem is, I want to use Case statement such as if output is not zero, only then execute this particular command



    truncate -s 0 /root/test/wayfile.log && screen -X -S wowow quit &


    script here



    #! /bin/bash

    case "$(grep ERROR /root/test/wayfile.log | wc -w)" in

    25) echo "empty log file and kill screen: $(date)" >> /var/log/finderror.txt
    truncate -s 0 /root/test/wayfile.log && screen -X -S wowow quit &
    ;;
    0) # all ok
    ;;
    esac








    share

























      0












      0








      0








      I wrote a small bash script, where it will try to find a word ERROR, if found resulting value will be non-zero variable numeric (for example, 25 I mentioned in the script but it is variable numeric value) and if not found, it will be 0.



      My problem is, I want to use Case statement such as if output is not zero, only then execute this particular command



      truncate -s 0 /root/test/wayfile.log && screen -X -S wowow quit &


      script here



      #! /bin/bash

      case "$(grep ERROR /root/test/wayfile.log | wc -w)" in

      25) echo "empty log file and kill screen: $(date)" >> /var/log/finderror.txt
      truncate -s 0 /root/test/wayfile.log && screen -X -S wowow quit &
      ;;
      0) # all ok
      ;;
      esac








      share














      I wrote a small bash script, where it will try to find a word ERROR, if found resulting value will be non-zero variable numeric (for example, 25 I mentioned in the script but it is variable numeric value) and if not found, it will be 0.



      My problem is, I want to use Case statement such as if output is not zero, only then execute this particular command



      truncate -s 0 /root/test/wayfile.log && screen -X -S wowow quit &


      script here



      #! /bin/bash

      case "$(grep ERROR /root/test/wayfile.log | wc -w)" in

      25) echo "empty log file and kill screen: $(date)" >> /var/log/finderror.txt
      truncate -s 0 /root/test/wayfile.log && screen -X -S wowow quit &
      ;;
      0) # all ok
      ;;
      esac






      linux bash ubuntu scripting





      share












      share










      share



      share










      asked 9 mins ago









      CryptoMiningPoolSetupYiimpCryptoMiningPoolSetupYiimp

      1033




      1033






















          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%2f505282%2fbash-script-case-statement-if-not-logic%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%2f505282%2fbash-script-case-statement-if-not-logic%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

          サソリ

          広島県道265号伴広島線

          Accessing regular linux commands in Huawei's Dopra Linux