Red Hat Red Hat Certifications EX200 Questions & Answers

• Question 81:

  Who ever creates the files/directories on archive group owner should be automatically should be the same group owner of archive.

  Correct Answer: Check the anser in explanation.

  chmod g+s /archive

  Verify using: ls -ld /archive Permission should be like: drwxrws--- 2 root sysuser 4096 Mar 16 18:08 /archive If SGID bit is set on directory then who every users creates the files on directory group owner automatically the owner of parent directory. To set the SGID bit: chmod g+s directory To Remove the SGID bit: chmod g-s directory

• Question 82:

  Download ftp://192.168.0.254/pub/boot.iso to /root, and mounted automatically under /media/cdrom and which take effect automatically at boot-start.

  Correct Answer: Check the anser in explanation.

  # cd /root; wget ftp://192.168.0.254/pub/boot.iso # mkdir -p /media/cdrom # vim /etc/fstab /root/boot.iso /media/cdrom iso9660 defaults,loop 0 0 # mount -a mount [-t vfstype] [-o options] device dir

• Question 83:

  Add a new logical partition having size 100MB and create the data which will be the mount point for the new partition.

  Correct Answer: Check the anser in explanation.

  1.

  Use fdisk /dev/hda-> To create new partition.

  2.

  Type n ->For New partitions

  3.

  It will ask for Logical or Primary Partitions. Press l for logical.

  4.

  It will ask for the Starting Cylinder: Use the Default by pressing Enter Keys

  5.

  Type the size: +100M you can specify either Last cylinder of size here.

  6.

  Press P to verify the partitions lists and remember the partitions name.

  7.

  Press w to write on partitions table.

  8.

  Either Reboot or use partprobe command.

  9.

  Use mkfs -t ext3 /dev/hda?

  OR

  1.

  mke2fs -j /dev/hda? ->To create ext3 filesystem.

  2.

  vi /etc/fstab

  3.

  Write:

  /dev/hda? /data ext3 defaults 0 0

  4.

  Verify by mounting on current sessions also:

  mount /dev/hda? /data

• Question 84:

  Create a volume group, and set the size is 500M, the size of single PE is 16M. Create logical volume named lv0 in this volume group, set size is 20 PE, make it as ext3 file system, and mounted automatically under data.

  Correct Answer: Check the anser in explanation.

  fdisk /dev/vda pvcreate /dev/vda3 vgcreate –s 16M vg0 /dev/vda3 lvcreate –n lv0 –l 20 vg0 mkfs.ext3 /dev/mapper/vg0-lv0 mkdir /data /etc/fstab: /dev/mapper/vg0-lv0 /data ext3 defaults 0 0 mount –a mount | grep data

• Question 85:

  The firewall must be open.

  Correct Answer: Check the anser in explanation.

  /etc/init.d/iptables start iptables -F iptables -X iptables -Z /etc/init.d/iptables save chkconfig iptables on

• Question 86:

  The system ldap.example.com provides an LDAP authentication service. Your system should bind to this service as follows: The base DN for the authentication service is dc=domain11, dc=example, dc=com LDAP is used to provide both account information and authentication information. The connection should be encrypted using the certificate at http:// host.domain11.example.com/pub/domain11.crt When properly configured, ldapuserX should be able to log into your system, but will not have a home directory until you have completed the autofs requirement. Username: ldapuser11 Password: password

  Correct Answer: Check the anser in explanation.

  system-config-authentication LDAP user DN=dc=domain11,dc=example,dc=com Server=host.domain11.example.com Certificate= http://host.domain11.example.com/pub/domain11.crt (enter url carefully, there maybe // or ..) LDAP password OK starting sssd

  su -ldapuser11 Display Bash prompt #exit

• Question 87:

  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.

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

• Question 88:

  Create one partitions having size 100MB and mount it on data.

  Correct Answer: Check the anser in explanation.

  1.

  Use fdisk /dev/hda to create new partition.

  2.

  Type n For New partitions.

  3.

  It will ask for Logical or Primary Partitions. Press l for logical.

  4.

  It will ask for the Starting Cylinder: Use the Default by pressing Enter Key.

  5.

  Type the Size: +100M you can specify either Last cylinder of size here.

  6.

  Press P to verify the partitions lists and remember the partitions name.

  7.

  Press w to write on partitions table.

  8.

  Either Reboot or use partprobe command.

  9.

  Use mkfs -t ext3 /dev/hda? OR mke2fs -j /dev/hda? To create ext3 filesystem. vi /etc/fstab Write: /dev/hda? /data ext3 defaults 1 2 Verify by mounting on current Sessions also: mount /dev/hda? /data

• Question 89:

  Resize the logical volume vo and its filesystem to 290 MB. Make sure that the filesystem contents remain intact.

  Note: Partitions are seldom exactly the same size requested, so a size within the range of 260 MB to 320 MiB is acceptable.

  Correct Answer: Check the anser in explanation.

  df -hT lvextend -L +100M /dev/vg0/vo lvscan xfs_growfs /home/ // home is LVM mounted directory Note: This step is only need to do in our practice environment, you do not need to do in the real exam resize2fs /dev/vg0/vo // Use this comand to update in the real exam df -hT OR e2fsck -f/dev/vg0/vo umount /home resize2fs /dev/vg0/vo required partition capacity such as 100M lvreduce -l 100M /dev/vg0/vo mount /dev/vg0/vo /home df –Ht

• Question 90:

  Configure the permissions of /var/tmp/fstab

  Copy the file /etc/fstab to /var/tmp/fstab. Configure the permissions of /var/tmp/fstab so that:

  the file /var/tmp/fstab is owned by the root user.

  the file /var/tmp/fstab belongs to the group root.

  the file /var/tmp/fstab should not be executable by anyone.

  the user natasha is able to read and write /var/tmp/fstab.

  the user harry can neither write nor read /var/tmp/fstab.

  all other users (current or future) have the ability to read /var/tmp/fstab.

  Correct Answer: Check the anser in explanation.

  cp -a /etc/fstab /var/tmp

  cd /var/tmp

  ls -l

  getfacl /var/tmp/fstab

  chmod ugo-x /var/tmp/fstab

  [ No need to do this, there won't be execute permission for the file by default]

  # setfacl -m u:natasha:rw /var/tmp/fstab # setfacl -m u:harry:0 /var/tmp/fstab(zero)

  [Read permission will be there for all the users, by default. Check it using ls -l /var/tmp/fstab] Verify by [ ls -la /var/tmp/fstab]