Ebook: Introducing the RHCSA and RHCE Exam Preparation Guide

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Ravi Saive

I am Ravi Saive, creator of TecMint. A Computer Geek and Linux Guru who loves to share tricks and tips on Internet. Most Of My Servers runs on Open Source Platform called Linux. Follow Me: Twitter, Facebook and Google+

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

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198 Responses

  1. Ruud van Zundert says:

    Hi, I have another suggestion. Having just tried exam ex200 and not even being able to start it, due to the first question (which I am not allowed to mention) can I please please ask you for the sake of others to add a small section about “how to change the root password when that password is not known/not given”. This avoids wasting time in turning up for the exam as well as the 500 euros (the price in The Netherlands) plus vat thx a lot

    Ruud

  2. carlos says:

    the book is great, help me to obtain the certification RHCSA .

    good book for few money.

    thanks ravi!

    • Ravi Saive says:

      @Carlos,

      Good to know that you’ve passed RHCSA exam, any plan to take RHCE? and thanks for finding this useful all credit goes to our author Gabriel..

  3. Ruud van Zundert says:

    Hi. Can I make a suggestion on the LDAP section? As I was going through the steps, I decided to do the ldap client side first, so issued:

    # yum update && yum install openldap openldap-clients nss-pam-ldapd
    

    and this worked fine. The next part, however, did not:

    # systemctl enable slapd.service
    

    as it could not find it.

    It turned out that this part was part of the ‘server’ setup, but that was not clear. So I installed openldap-servers and then the command worked.

    The next hurdle was this: creating the ldaprootpasswd.ldif file. It did not state ‘where’ to place it, so in the end I realized it could be anywhere.

    [root@centosvm ~]# ldapadd -H ldapi:/// -f ldaprootpasswd.dif
    SASL/GSS-SPNEGO authentication started
    ldap_sasl_interactive_bind_s: Local error (-2)
    additional info: SASL(-1): generic failure: GSSAPI Error: 
    Unspecified GSS failure.  Minor code may provide more information (SPNEGO cannot find mechanisms to negotiate)
    

    Google pointed me at this website: https://bugzilla.redhat.com/show_bug.cgi?id=1206910

    which suggested I add an extra parameter “-Y EXTERNAL” … and then it worked:

    [root@centosvm ~]# ldapadd -H ldapi:/// -f ldaprootpasswd.dif -Y EXTERNAL
    SASL/EXTERNAL authentication started
    SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth
    SASL SSF: 0
    modifying entry "olcDatabase={0}config,cn=config"
    

    Might be worth making some additional comments in the LDAP section.

    Cheers … Ruud

    • Ravi Saive says:

      @Ruud,

      Yes, you can suggest any solutions about the chapters in this RHCSA/RHCE book as far its 100% true. We will review and correct the errors if any in the book as per suggestions given by our readers.

  4. Ruud van Zundert says:

    Hi, On page 54 the RHCSA pdf states:

    Let’s give user gacanepa read and write access to /mnt/playground/testfile.txt. Run as root

    # setfacl -R -m u:gacanepa:rwx /mnt/playground
    

    and you’ll have successfully added an ACL that allows gacanepa to write to the test file.

    This is not correct. It should say:

    # setfacl -R -m u:gacanepa:rwx /mnt/playground/testfile.txt
    

    This is the second ‘typo’ I have found in this pdf. When will you make the corrections for the next person who pays for the pdf?

    Regards
    Ruud

    • Ravi Saive says:

      @Ruud,

      Thanks for pointing out the mistake in RHCSA section, we will correct all typos in the next updated version of pdf, till then stay tuned to TecMint..

  5. Ruud van Zundert says:

    Example 7: Creating hard and soft links
    There is no better way to visualize the relation between a file and a hard or symbolic link that point to it, than
    to create those links. In the following screenshot you will see that the file and the hard link that points to it
    share the same inode and both are identified by the same disk usage of 466 bytes. On the other hand,
    creating a hard link results in an extra disk usage of 5 bytes

    The last sentence should read … On the other hand, creating a SOFT link results in an extra disk usage of 5 bytes

    cheers … Ruud

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