RedHat EX200 Red Hat Certified System Administrator (RHCSA) Exam Exam Practice Test Questions

• Question 1

  Configure autofs.Configure the autofs automatically mount to the home directory of LDAP, as required:server.domain11.example.com use NFS to share the home to your system. This file system contains a preconfigured home directory of user ldapuserX.Home directory of ldapuserX is:server.domain11.example.com /home/guests/ldapuserHome directory of ldapuserX should automatically mount to the ldapuserX of the local /home/guests Home directory's write permissions must be available for users ldapuser1's password is password

  • Explanation:
    yum install -y autofs
    mkdir /home/rehome
    /etc/auto.master
    /home/rehome/etc/auto.ldap
    Keep then exit
    cp /etc/auto.misc /etc/auto.ldap
    /etc/auto.ldap
    ldapuserX -fstype=nfs,rw server.domain11.example.com:/home/guests/
    Keep then exit
    systemctl start autofs
    systemctl enable autofs
    su - ldapuserX// test
    If the above solutions cannot create files or the command prompt is -bash-4.2$, it maybe exist multi-level directory, this needs to change the server.domain11.example.com:/home/guests/ to server.domain11.example.com:/home/guests/ldapuserX. What is multi-level directory? It means there is a directory of ldapuserX under the /home/guests/ldapuserX in the questions. This directory is the real directory.
    

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• Question 2

  Successfully resolve to server1.example.com where your DNS server is 172.24.254.254.

  • Explanation:
    vi /etc/resolv.conf
    nameserver 172.24.254.254
    host server1.example.com
    On every clients, DNS server is specified in /etc/resolv.conf. When you request by name it tries to resolv from DNS server.
    

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• Question 3

  Adjust the size of the Logical Volume.Adjust the size of the vo Logical Volume, its file system size should be 290M. Make sure that the content of this system is complete.Note: the partition size is rarely accurate to the same size as required, so in the range 270M to 320M is acceptable.

  • Explanation:
    Addition
    df -hT
    lvextend -L +100M /dev/vg0/vo
    Lvscan
    xfs_growfs /home/ //home is the mounted directory of the LVM, this step just need to do in the practice environment, and test EXT4 does not need this step.
    resize2fs /dev/vg0/vo// use this command to update in examination.
    df -hT
    OR
    Subtraction
    e2fsck -f/dev/vg0/vo
    umount /home
    resize2fs /dev/vg0/vo // the final required partition capacity is 100M lvreduce -l 100M /dev/vg0/vo
    mount /dev/vg0/vo/home
    df -hT
    

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• Question 4

  Upgrade the kernel, start the new kernel by default. kernel download from this address:

  • Explanation:
    Download the new kernel file and then install it.
    [root@desktop8 Desktop]# ls
    kernel-2.6.32-71.7.1.el6.x86_64.rpm
    kernel-firmware-2.6.32-71.7.1.el6.noarch.rpm
    [root@desktop8 Desktop]# rpm -ivh kernel-*
    Preparing... ###########################################
    [100%]
    1:kernel-firmware
    ########################################### [ 50%]
    2:kernel
    ########################################### [100%]
    Verify the grub.conf file, whether use the new kernel as the default boot. [root@desktop8 Desktop]# cat /boot/grub/grub.conf default=0
    title Red Hat Enterprise Linux Server (2.6.32-71.7.1.el6.x86_64)
    root (hd0,0)
    kernel /vmlinuz-2.6.32-71.7.1.el6.x86_64 ro root=/dev/mapper/vol0-root rd_LVM_LV=vol0/root rd_NO_LUKS rd_NO_MD
    rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet
    initrd /initramfs-2.6.32-71.7.1.el6.x86_64.img
    

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• Question 5

  Part 1 (on Node1 Server)Task 15 [Running Containers]Create a container named logserver with the image rhel8/rsyslog found from the registry registry.domain15.example.com:5000The container should run as the root less user shangrila. use redhat as password [sudo user]Configure the container with systemd services as the shangrila user using the service name, ''container-logserver'' so that it can be persistent across reboot.Use admin as the username and admin123 as the credentials for the image registry.

  • Explanation:
    *
    [root@workstation ~]# ssh shangrila@node1
    [shangrila@node1 ~]$ podman login registry.domain15.example.com:5000
    Username: admin
    Password:
    Login Succeeded!
    [shangrila@node1 ~]$ podman pull registry.domain15.example.com:5000/rhel8/rsyslog
    [shangrila@node1 ~]$ podman run -d --name logserver registry.domain15.example.com:5000/rhel8/rsyslog
    021b26669f39cc42b8e94eab886ba8293d6247bf68e4b0d76db2874aef284d6d
    [shangrila@node1 ~]$ mkdir -p ~/.config/systemd/user
    [shangrila@node1 ~]$ cd ~/.config/systemd/user
    *
    [shangrila@node1 user]$ podman generate systemd --name logserver --files --new
    /home/shangrila/.config/systemd/user/container-logserver.service
    [shangrila@node1 ~]$ systemctl --user daemon-reload
    [shangrila@node1 user]$ systemctl --user enable --now container-logserver.service
    [shangrila@node1 ~]$ podman ps
    CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
    7d9f7a8a4d63 registry.domain15.example.com:5000/rhel8/rsyslog:latest /bin/rsyslog.sh 2 seconds ago logserver
    [shangrila@node1 ~]$ sudo reboot
    [shangrila@node1 ~]$ cd .config/systemd/user
    [shangrila@node1 user]$ systemctl --user status
    

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