RHCSA Series: Reviewing Essential Commands & System Documentation – 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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19 Responses

  1. Mehboob Hafiz says:

    Are these 15 parts enough to prepare and appear in RHEL7 EX200 exam.?

  2. thota.raju says:

    i am getting below error plz help .
    [[email protected] ldap]# ldapadd -H ldapi:/// -f /root/ldaprootpasswd.ldif SASL/SCRAM-SHA-1 authentication started
    Please enter your password:
    ldap_sasl_interactive_bind_s: Invalid credentials (49)
    additional info: SASL(-13): user not found: no secret in database

  3. russ says:

    Please confirm if gui installed on rhcsa test machine or I have to install it using yum groupinstall gnome desktop

  4. KP says:

    I just passed the RHCA with flying colors thanks in part to your materials.
    Great work putting all this materiel up.
    Thank You.

  5. Fernando Boluele says:

    Gabriel Cánepa,

    Before of all, I want to thank you for the good work you are doing. One question is it possible you make all those topic already made to pdf?


  6. Jairusan says:


    Thank you so very much for the excellent tutorial. I am assuming that you currently certified as RHCSA? I am currently preparing to go and present the text so these tutorials you have been created are excellent for practice and preparation. Gracias de nuevo!

    • @Jairusan,
      I appreciate your taking the time to comment on this post and for your kind words about my work. To answer your question – no, I am not certified as RHCSA. More of a logistics issue than anything else – I live ~450 miles from the nearest testing center. Hopefully in the future.

  7. Senthilkumar Palani says:

    Thanks. Very useful. Waiting for the next part.

  8. ctwhatexit says:

    Open the /etc/ssh/sshd.conf file and change the Port=22 entry to Port=
    Restart SSh to see your new SSh port.
    Make sure your firewalls are also updated for incoming requests to this new port.

  9. abdi says:

    HI Gabriel,

    Thanks for the RHCSA tutorial, how do i get access to parts 2 onwards?


  10. Plzzz provide a tutorial on how to change the ssh port and listen on different port

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