How can I use grep in a loop and add new line of text each time to the same file?

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











up vote
0
down vote

favorite












I am trying to use grep in a loop and extract data from many files and then save them in a text file. Currently when I write



grep sth > test.txt


It writes it in the file test.txt, but when I run the same code it will not add the text to the end of the previously saved text, it overwrites it. What can I do?






shell-script shell grep







share|improve this question







New contributor




emad1234 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.























    up vote
    0
    down vote

    favorite












    I am trying to use grep in a loop and extract data from many files and then save them in a text file. Currently when I write



    grep sth > test.txt


    It writes it in the file test.txt, but when I run the same code it will not add the text to the end of the previously saved text, it overwrites it. What can I do?






    shell-script shell grep







    share|improve this question







    New contributor




    emad1234 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.





















      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I am trying to use grep in a loop and extract data from many files and then save them in a text file. Currently when I write



      grep sth > test.txt


      It writes it in the file test.txt, but when I run the same code it will not add the text to the end of the previously saved text, it overwrites it. What can I do?






      shell-script shell grep







      share|improve this question







      New contributor




      emad1234 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I am trying to use grep in a loop and extract data from many files and then save them in a text file. Currently when I write



      grep sth > test.txt


      It writes it in the file test.txt, but when I run the same code it will not add the text to the end of the previously saved text, it overwrites it. What can I do?






      shell-script shell grep




      shell-script shell grep






      share|improve this question







      New contributor




      emad1234 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question







      New contributor




      emad1234 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|improve this question




      share|improve this question






      New contributor




      emad1234 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked 12 mins ago









      emad1234

      1




      1




      New contributor




      emad1234 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      New contributor





      emad1234 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






      emad1234 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.




















          1 Answer
          1






          active

          oldest

          votes

















          up vote
          0
          down vote













          You need >>



          > overwrites the data in a file whereas >> appends the data to the end of the file.



          I'm going to assume that you have some foles that you are getting from



          grep sth /path/to/files/* >> test.txt




          share




















            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',
            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
            );



            );






            emad1234 is a new contributor. Be nice, and check out our Code of Conduct.









             

            draft saved


            draft discarded


















            StackExchange.ready(
            function ()
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f479679%2fhow-can-i-use-grep-in-a-loop-and-add-new-line-of-text-each-time-to-the-same-file%23new-answer', 'question_page');

            );

            Post as a guest

















            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes








            up vote
            0
            down vote













            You need >>



            > overwrites the data in a file whereas >> appends the data to the end of the file.



            I'm going to assume that you have some foles that you are getting from



            grep sth /path/to/files/* >> test.txt




            share
























              up vote
              0
              down vote













              You need >>



              > overwrites the data in a file whereas >> appends the data to the end of the file.



              I'm going to assume that you have some foles that you are getting from



              grep sth /path/to/files/* >> test.txt




              share






















                up vote
                0
                down vote










                up vote
                0
                down vote









                You need >>



                > overwrites the data in a file whereas >> appends the data to the end of the file.



                I'm going to assume that you have some foles that you are getting from



                grep sth /path/to/files/* >> test.txt




                share












                You need >>



                > overwrites the data in a file whereas >> appends the data to the end of the file.



                I'm going to assume that you have some foles that you are getting from



                grep sth /path/to/files/* >> test.txt





                share











                share


                share










                answered 4 mins ago









                Nasir Riley

                1,993139




                1,993139




















                    emad1234 is a new contributor. Be nice, and check out our Code of Conduct.









                     

                    draft saved


                    draft discarded


















                    emad1234 is a new contributor. Be nice, and check out our Code of Conduct.












                    emad1234 is a new contributor. Be nice, and check out our Code of Conduct.











                    emad1234 is a new contributor. Be nice, and check out our Code of Conduct.













                     


                    draft saved


                    draft discarded














                    StackExchange.ready(
                    function ()
                    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f479679%2fhow-can-i-use-grep-in-a-loop-and-add-new-line-of-text-each-time-to-the-same-file%23new-answer', 'question_page');

                    );

                    Post as a guest
































































                    -

                    Popular posts from this blog

                    How to check contact read email or not when send email to Individual?

                    Image
                    Clash Royale CLAN TAG #URR8PPP up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this question asked Sep 26 at 0:12 ToanLuong 49 9 add a comment  |  up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this question asked Se
                    Read more

                    Bahrain

                    Image
                    For other uses, see Bahrain (disambiguation). Sovereign island state in the Persian Gulf Kingdom of Bahrain مملكة البحرين   (Arabic) Mamlakat al-Baḥrayn Flag Coat of arms Anthem:  نشيد البحرين الوطني Bahrainona Our Bahrain Location of   Bahrain    (circled in red) Capital and largest city Manama 26°13′N 50°35′E  /  26.217°N 50.583°E  / 26.217; 50.583 Official languages Arabic Ethnic groups (2010 [1] ) 50.7% Arab (46% Bahrani, 4.7% other Arabs) 45.5% Asian 1% European 1.2% Others Religion Islam Demonym(s) Bahraini Government Unitary constitutional monarchy • King Hamad bin Isa Al Khalifa • Crown Prince Salman bin Hamad bin Isa Al Khalifa • Prime Minister Khalifa bin Salman Al Khalifa Legislature National Assembly • Upper house Consultative Council • Lower house Council of Representatives Independence • Declared Independence [2] 14 August 1971 • from United Kingdom [1] 15 August 1971 • Admitted to the United Nations 21 September 1971 • Kingdom of Bahrain 14 February 2002
                    Read more

                    Postfix configuration issue with fips on centos 7; mailgun relay

                    Image
                    Clash Royale CLAN TAG #URR8PPP up vote 0 down vote favorite I am trying to setup postfix to relay all mail generated on the local machine via SMTP to a mailgun relay. I have used the mailgun relay before with success on an ubuntu server, but I am migrating to a Centos 7 server which I will be running in FIPS mode. There error log is below, slightly sanitized. I have a small enough network that I choose to have each machine reach out to mailgun individually (this the loopback-only, 127.0.0.0/8 restrictions) and no firewall open port allowing smtp in to the machine. I assume the FIPS mode (and with it disabling of MD5) is causing problems, but I don't know how to overcome it or if it is even possible for tls_fprint to use some supported hash such as sha256 or sha512. However, the relay=none is slightly concerning since I have relayhost set, but perhaps that is because the smtp process is failing? Any help would be appreciated! postconf -n: alias_database = hash:/etc/alia
                    Read more