Red Hat EX200 Online Practice Questions and Exam Preparation

Red Hat EX200 Online Questions & Answers

• Question 51:

  Upgrade the kernel, start the new kernel by default. kernel download from this address: ftp://server1.domain10.example.com/pub/update/new.kernel

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  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

• Question 52:

  Configure

  your web services, download from http://instructor.example.com/pub/serverX.html And the services must be still running after system rebooting.

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

  ---

  cd /var/www/html wget http://instructor.example.com/pub/serverX.html mv serverX.html index.html /etc/init.d/httpd restart chkconfig httpd on

• Question 53:

  Change the logical volume capacity named vo from 190M to 300M. and the size of the floating range should set between 280 and 320. (This logical volume has been mounted in advance.)

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  # vgdisplay (Check the capacity of vg, if the capacity is not enough, need to create pv , vgextend , lvextend) # lvdisplay (Check lv) # lvextend -L +110M /dev/vg2/lv2 # resize2fs /dev/vg2/lv2 mount -a (Verify)

  (Decrease lvm) # umount /media # fsck -f /dev/vg2/lv2 # resize2fs -f /dev/vg2/lv2 100M # lvreduce -L 100M /dev/vg2/lv2 # mount -a # lvdisplay (Verify) OR # e2fsck -f /dev/vg1/lvm02 # resize2fs -f /dev/vg1/lvm02 # mount /dev/vg1/lvm01 /mnt # lvreduce -L 1G -n /dev/vg1/lvm02 # lvdisplay (Verify)

• Question 54:

  Add 3 users: harry, natasha, tom.

  The requirements: The Additional group of the two users: harry, Natasha is the admin group. The user: tom's login shell should be non-interactive.

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  # useradd -G admin harry # useradd -G admin natasha # useradd -s /sbin/nologin tom # id harry;id Natasha (Show additional group) # cat /etc/passwd (Show the login shell) OR # system-config-users

• Question 55:

  Make on /archive directory that only the user owner and group owner member can fully access.

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  chmod 770 /archive Verify using : ls -ld /archive Preview should be like: drwxrwx--- 2 root sysuser 4096 Mar 16 18:08 /archive To change the permission on directory we use the chmod command. According to the question that only the owner user (root) and group member (sysuser) can fully access the directory so: chmod 770 /archive

• Question 56:

  Part 1 (on Node1 Server)

  Task 1 [Managing Networking]

  Please create new network connection with existing interface (enp1s0) using provided values:

  IPv4: 172.25.X.10/255.255.255.0 (where X is your domain number: Domain15)

  Gateway: 172.25.X.2

  DNS server: 172.25.X.2

  Add the following secondary IP addresses statically to your current running connection. Do this in a way that does not compromise your existing settings:

  IPv4: 10.0.0.5/24 and set the hostname node1.domain15.example.com

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

  ---

  * [root@node1 ~]# nmcli connection show [root@node1 ~]# nmcli connection add con-name static ifname enp1s0 type ethernet ipv4.addresses 172.25.15.10/24 ipv4.gateway 172.25.15.2 ipv4.dns 172.25.15.2 [root@node1 ~]# nmcli connection modify static ipv4.method manual connection.autoconnect yes [root@node1 ~]# nmcli connection modify static +ipv4.addresses 10.0.0.5/24 [root@node1 ~]# nmcli connection up static [root@node1 ~]# nmcli connection show [root@node1 ~]# hostnamectl set-hostname node1.domain15.example.com [root@node1 ~]# hostnamectl status [root@node1 ~]# nmcli connection down static * [root@node1 ~]# nmcli connection up static [root@node1 ~]# ip addr show [root@node1 ~]# reboot ### For checking ### [root@node1 ~]# ip addr show [root@node1 ~]# netstat -nr [root@node1 ~]# cat /etc/resolv.conf

• Question 57:

  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 pre configured home directory of user ldapuserX.

  Home directory of ldapuserX is:

  server.domain11.example.com /home/guests/ldapuser

  Home 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

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  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.

• Question 58:

  One Logical Volume named /dev/test0/testvolume1 is created. The initial Size of that disk is 100MB now you required more 200MB. Increase the size of Logical Volume, size should be increase on online.

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  1.

  lvextend -L+200M /dev/test0/testvolume1 Use lvdisplay /dev/test0/testvolume1)

  2.

  ext2online -d /dev/test0/testvolume1

  lvextend command is used the increase the size of Logical Volume. Other command lvresize command also here to resize. And to bring increased size on online we use the ext2online command.

• Question 59:

  Configure a user account.

  Create a user iaruid is 3400. Password is redhat

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  useradd -u 3400 iar passwd iar

• Question 60:

  Create a catalog under /home named admins. Its respective group is requested to be the admin group. The group users could read and write, while other users are not allowed to access it. The files created by users from the same group should also be the admin group.

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  # cd /home/ # mkdir admins / # chown .admin admins/ # chmod 770 admins/ # chmod g+s admins/