Red Hat Red Hat Certifications EX200 Questions & Answers

• Question 31:

  Add an additional swap partition of 754 MB to your system.

  The swap partition should automatically mount when your system boots.

  Do not remove or otherwise alter any existing swap partitions on your system.

  Correct Answer: Check the anser in explanation.

  fdisk -l fdisk -cu /dev/vda p n e or p select e default (first): enter default (last): enter n default(first): enter default(first): +754M t (1-5)

  l: 82 p w #reboot #mkswap /dev/vda5

  vim /etc/fstab /dev/vda5 swap swap defaults 0 0 wq

  

  mount -a

  swapon -a

  swapon -s

• Question 32:

  Find the files owned by harry, and copy it to catalog: /opt/dir

  Correct Answer: Check the anser in explanation.

  # cd /opt/

  # mkdir dir

  # find / -user harry -exec cp -rfp {} /opt/dir/ \;

• Question 33:

  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.

  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 34:

  Find the rows that contain abcde from file /etc/testfile, and write it to the file/tmp/testfile, and the sequence is requested as the same as /etc/testfile.

  Correct Answer: Check the anser in explanation.

  # cat /etc/testfile | while read line; do echo $line | grep abcde | tee -a /tmp/testfile done OR grep `abcde' /etc/testfile > /tmp/testfile

• Question 35:

  Create a logical volume

  Create a new logical volume as required:

  Name the logical volume as database, belongs to datastore of the volume group, size is 50 PE.

  Expansion size of each volume in volume group datastore is 16MB.

  Use ext3 to format this new logical volume, this logical volume should automatically mount to /mnt/database

  Correct Answer: Check the anser in explanation.

  fdisk -cu /dev/vda// Create a 1G partition, modified when needed partx –a /dev/vda pvcreate /dev/vdax vgcreate datastore /dev/vdax –s 16M lvcreate– l 50 –n database datastore mkfs.ext3 /dev/datastore/database mkdir /mnt/database mount /dev/datastore/database /mnt/database/ df –Th vi /etc/fstab /dev/datastore /database /mnt/database/ ext3 defaults 0 0 mount –a Restart and check all the questions requirements.

• Question 36:

  Configure /var/tmp/fstab Permission. Copy the file /etc/fstab to /var/tmp/fstab. Configure var/tmp/fstab permissions as the following: Owner of the file /var/tmp/fstab is Root, belongs to group root File /var/tmp/fstab cannot be executed by any user User natasha can read and write /var/tmp/fstab User harry cannot read and write /var/tmp/fstab All other users (present and future) can read var/tmp/fstab.

  Correct Answer: Check the anser in explanation.

  cp /etc/fstab /var/tmp/

  /var/tmp/fstab view the owner setfacl -m u:natasha:rw- /var/tmp/fstab setfacl -m u:haryy:--- /var/tmp/fstab Use getfacl /var/tmp/fstab to view permissions

• Question 37:

  Configure the system synchronous as 172.24.40.10.

  Correct Answer: Check the anser in explanation.

  Graphical Interfaces: System-->Administration-->Date and Time OR # system-config-date

• Question 38:

  The user authentication has been provided by ldap domain in 192.168.0.254. According the following requirements to get ldapuser.

  -LdapuserX must be able to login your system, X is your hostname number. But the ldapuser's home directory cannot be mounted, until you realize automatically mount by autofs server.

  -All ldap user's password is "password".

  Correct Answer: Check the anser in explanation.

  system-config-authentication and

  

• Question 39:

  Configure iptables, there are two domains in the network, the address of local domain is 172.24.0.0/16 other domain is 172.25.0.0/16, now refuse domain 172.25.0.0/16 to access the server.

  Correct Answer: Check the anser in explanation.

  iptables -F service iptables save iptables -A INPUT -s 172.25.0.0/16 -j REJECT service iptables save service iptables restart

• Question 40:

  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.

  Correct Answer: Check the anser in 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