LFCS: How to use GNU ‘sed’ Command to Create, Edit, and Manipulate files in Linux – Part 1

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Gabriel Cánepa

Gabriel Cánepa is a GNU/Linux sysadmin and web developer from Villa Mercedes, San Luis, Argentina. He works for a worldwide leading consumer product company and takes great pleasure in using FOSS tools to increase productivity in all areas of his daily work.

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RedHat RHCE and RHCSA Certification Book
Linux Foundation LFCS and LFCE Certification Preparation Guide

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42 Responses

  1. Saqib says:


    I know there was a refresh for the LFCS 2018 exam.

    I’m wondering if anyone has taken it or used tecmint to study for it via this guide? It looks pretty good to me overall, but i’m wondering if there’s some things that are updated that weren’t on the guide?

  2. Traian Sandu says:

    Thank you for your help, and for this great series created for the LFCS exam! I just passed the exam and all of the information found here is valuable and extremely helpful. Great job !!

  3. Ian says:

    Hi Gabriel,
    First of all, thank you for such a wonderful guide on LFCS. I’m brushing up on my Linux and will probably go through your LFCE series as well, and perhaps go for the cert someday.

    Question: Since the exam lets you choose the distribution you test with, can we simply focus on the specific ways of doing things? Let’s say I will plan to test on Centos, can I simply skip the Debian and OpenSUSE commands to cut on reading time?

    • Gabriel A. Cánepa says:

      Thanks for your kind words about this guide! Yes, if you’re planning on taking the exam using a specific distro, you can skip the commands of the others to cut on reading time. Please let us know if you decide to take the exam!

      • Oliver Borge says:

        Hi Gabriel, is the information in these tutorials the same in the ebook that is offered here or does the ebook cover more information.

        • Gabriel A. Cánepa says:

          The PDF version contains several corrections that were pointed out by the readers of these tutorials. Other than that, it’s exactly the same material.

  4. Piotr says:

    Hi Gabriel,

    Today I passed my exam and I’d like to say thank you for such a great series! It was my main source for learning. Awesome work.

  5. PowerInfoSSL says:

    Thank you for Greet work .

  6. Steffen says:

    Hello Gabriel,
    thanks for this article series. Are the lab files available somewhere?


  7. Elyasin says:

    A thank you from my side. I am doing the LFCS course and preparing the certification next year.
    The tutorial is a good complement.

    • @Elyasin,
      I am glad to hear that this series is a good complement to prepare for the certification. Did you already take the exam? If so, would you be as kind as to share your experience with us?

  8. Aly says:

    Thanks for this great job!!
    I only used this material to prepare the LFCS exam and it helped me a lot. Exam passed!!

    Only is missing the LVM section which I learned from the Ubuntu page. But I will definitely recommend this training series!

    Thanks again.

    • @Aly,
      I am so glad to hear that you used the LFCS series to prepare for the exam. Yes, LVM is not included because when I first wrote the series that topic was not in the domain and competencies required for the exam. Eventually, LVM replaced RAID so when I review these articles here soon I’ll make sure to make the change.
      Please help us by spreading the word. That is the best thank you! you can give us :).

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