Red Hat Red Hat Certifications EX200 Questions & Answers

• Question 61:

  Configure a task: plan to run echo hello command at 14:23 every day.

  Correct Answer: Check the anser in explanation.

  # which echo # crontab -e 23 14 * * * /bin/echo hello # crontab -l (Verify)

• Question 62:

  Open kmcrl value of 5 , and can verify in /proc/ cmdline

  Correct Answer: Check the anser in explanation.

  # vim /boot/grub/grub.conf kernel/vmlinuz-2.6.32-71.el6.x86_64 ro root=/dev/mapper/GLSvg-GLSrootrd_LVM_LV=GLSvg/GLSroot rd_LVM_LV=GLSvg/GLSswaprd_NO_LUKSrd_NO_MDrd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet kmcrl=5 Restart to take effect and verification: # cat /proc/cmdline ro root=/dev/mapper/GLSvg-GLSroot rd_LVM_LV=GLSvg/GLSroot rd_LVM_LV=GLSvg/GLSswap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rhgb quiet kmcrl=5

• Question 63:

  There are two different networks, 192.168.0.0/24 and 192.168.1.0/24. Your System is in 192.168.0.0/24 Network. One RHEL6 Installed System is going to use as a Router. All required configuration is already done on Linux Server. Where

  192.168.0.254 and 192.168.1.254 IP Address are assigned on that Server. How will make successfully ping to 192.168.1.0/24 Network's Host?

  Correct Answer: Check the anser in explanation.

  vi /etc/sysconfig/network GATEWAY=192.168.0.254

  OR

  vi /etc/sysconf/network-scripts/ifcfg-eth0 DEVICE=eth0

  BOOTPROTO=static

  ONBOOT=yes

  IPADDR=192.168.0.?

  NETMASK=255.255.255.0

  GATEWAY=192.168.0.254

  service network restart

  Gateway defines the way to exit the packets. According to question System working as a router for two networks have IP Address 192.168.0.254 and 192.168.1.254.

• Question 64:

  Create the following users, groups, and group memberships:

  A group named adminuser.

  A user natasha who belongs to adminuser as a secondary group A user harry who also belongs to adminuser as a secondary group.

  A user sarah who does not have access to an interactive shell on the system, and who is not a member of adminuser, natasha, harry, and sarah should all have the password of redhat.

  Correct Answer: Check the anser in explanation.

  groupadd sysmgrs

  useradd -G sysmgrs Natasha

  We can verify the newly created user by cat /etc/passwd) # useradd -G sysmgrs harry # useradd -s /sbin/nologin sarrh # passwd Natasha # passwd harry # passwd sarrah

• Question 65:

  Install the appropriate kernel update from http://server.domain11.example.com/pub/updates. The following criteria must also be met: The updated kernel is the default kernel when the system is rebooted The original kernel remains available and bootable on the system

  Correct Answer: Check the anser in explanation.

  ftp server.domain11.example.com Anonymous login ftp> cd /pub/updates ftp> ls ftp> mget kernel* ftp> bye

  rpm -ivh kernel*

  vim /etc/grub.conf Check the updatted kernel is the first kernel and the orginal kernel remains available. set default=0 wq!

• Question 66:

  Update the kernel from ftp://instructor.example.com/pub/updates. According the following requirements:

  The updated kernel must exist as default kernel after rebooting the system.

  The original kernel still exists and is available in the system.

  Correct Answer: Check the anser in explanation.

  rpm -ivh kernel-firm… rpm -ivh kernel...

• Question 67:

  A YUM source has been provided in the http://instructor.example.com/pub/rhel6/dvd Configure your system and can be used normally.

  Correct Answer: Check the anser in explanation.

  /etc/yum.repos.d/base.repo [base] name=base baseurl=http://instructor.example.com/pub/rhel6/dvd gpgcheck=0 yum list

• Question 68:

  Configure a task: plan to run echo "file" command at 14:23 every day.

  Correct Answer: Check the anser in explanation.

  (a) Created as administrator # crontab -u natasha -e 23 14 * * * /bin/echo "file" (b)Created as natasha # su - natasha $ crontab -e 23 14 * * * /bin/echo "file"

• Question 69:

  You are new System Administrator and from now you are going to handle the system and your main task is Network monitoring, Backup and Restore. But you don't know the root password. Change the root password to redhat and login in default Runlevel.

  Correct Answer: Check the anser in explanation.

  When you Boot the System, it starts on default Runlevel specified in /etc/inittab:

  Id:?:initdefault:

  When System Successfully boot, it will ask for username and password. But you don't know the root's password. To change the root password you need to boot the system into single user mode. You can pass the kernel arguments from the

  boot loader.

  1.

  Restart the System.

  2.

  You will get the boot loader GRUB screen.

  3.

  Press a and type 1 or s for single mode ro root=LABEL=/ rhgb queit s

  4.

  System will boot on Single User mode.

  5.

  Use passwd command to change.

  6.

  Press ctrl+d

• Question 70:

  Configure autofs to automount the home directories of LDAP users as follows:

  host.domain11.example.com NFS-exports /home to your system.

  This filesystem contains a pre-configured home directory for the user ldapuser11 ldapuser11's home directory is host.domain11.example.com /rhome/ldapuser11 ldapuser11's home directory should be automounted locally beneath /rhome

  as /rhome/ldapuser11

  Home directories must be writable by their users

  ldapuser11's password is 'password'.

  Correct Answer: Check the anser in explanation.

  vim /etc/auto.master /rhome /etc/auto.misc wq! # vim /etc/auto.misc ldapuser11 --rw,sync host.domain11.example.com:/rhome/ldpauser11 :wq! #service autofs restart

  service autofs reload

  chkconfig autofs on

  su -ldapuser11 Login ldapuser with home directory # exit