Red Hat Red Hat Certifications EX200 Questions & Answers

• Question 101:

  Add user: user1, set uid=601 Password: redhat The user's login shell should be non-interactive.

  Correct Answer: Check the anser in explanation.

  # useradd -u 601 -s /sbin/nologin user1 # passwd user1 redhat

• Question 102:

  Your System is going use as a router for 172.24.0.0/16 and 172.25.0.0/16. Enable the IP Forwarding.

  1.

  echo "1" >/proc/sys/net/ipv4/ip_forward

  2.

  vi /etc/sysctl.conf net.ipv4.ip_forward=1

  Correct Answer: Check the anser in explanation.

  /proc is the virtual filesystem, containing the information about the running kernel.

  To change the parameter of running kernel you should modify on /proc. From Next reboot the system, kernel will take the value from /etc/sysctl.conf.

• Question 103:

  Add users: user2, user3.

  The Additional group of the two users: user2, user3 is the admin group Password: redhat

  Correct Answer: Check the anser in explanation.

  # useradd -G admin user2 # useradd -G admin user3 # passwd user2 redhat # passwd user3 redhat

• Question 104:

  Configure your system so that it is an NTP client of server.domain11.example.com

  Correct Answer: Check the anser in explanation.

  #system-config-date Note: dialog box will open in that Check mark Synchronize date and time over network. Remove all the NTP SERVER and click ADD and type server.domain11.example.com ****************And then press ENTER and the press OK***************

• Question 105:

  There is a server having 172.24.254.254 and 172.25.254.254. Your System lies on 172.24.0.0/16. Make successfully ping to 172.25.254.254 by Assigning following IP: 172.24.0.x where x is your station number.

  Correct Answer: Check the anser in explanation.

  Use netconfig command

  Enter the IP Address as given station number by your examiner: example: 172.24.0.1

  Enter Subnet Mask

  Enter Default Gateway and primary name server

  press on ok

  ifdown eth0

  ifup eth0

  verify using ifconfig

  In the lab server is playing the role of router, IP forwarding is enabled. Just set the Correct IP and gateway, you can ping to 172.25.254.254.

• Question 106:

  SELinux must be running in the Enforcing mode.

  Correct Answer: Check the anser in explanation.

  getenforce // Check the current mode of SELinux // SELinux runs in enforcing mode // Check getenforce 1 getenforce vim /etc/selinux/config selinux=enforcing // To temporarily enable SELinux wg sestatus

• Question 107:

  Copy /etc/fstab to /var/tmp name admin, the user1 could read, write and modify it, while user2 without any permission.

  Correct Answer: Check the anser in explanation.

  # cp /etc/fstab /var/tmp/ # chgrp admin /var/tmp/fstab # setfacl -m u:user1:rwx /var/tmp/fstab # setfacl -m u:user2:--- /var/tmp/fstab # ls -l -rw-rw-r--+ 1 root admin 685 Nov 10 15:29 /var/tmp/fstab

• Question 108:

  Binding to an external validation server.

  System server.domain11.example.com provides a LDAP validation service, your system should bind to this service as required:

  Base DN of validation service is dc=example,dc=com

  LDAP

  is used for providing account information and validation information Connecting and using the certification of http://server.domain11.example.com/pub/EXAMPLE-CA-CERT to encrypt

  After the correct configuration, ldapuser1 can log into your system, it does not have HOME directory until you finish autofs questions, ldapuser1 password is password.

  Correct Answer: Check the anser in explanation.

  yum -y install sssd authconfig-gtk krb5-workstation authconfig-gtk // open the graphical interface Modify user account database to ldap, fill up DN and LDAP SERVER as questions required, use TLS to encrypt connections making tick, write http://server.domain11.example.com/pub/EXAMPLE-CA-CERT to download ca, authentication method choose ldap password. You can test if the ldapuser is added by the following command: Id ldapuser1 Note: user password doesn't not need to set

• Question 109:

  Create User Account.

  Create the following user, group and group membership:

  Adminuser group

  User natasha, using adminuser as a sub group

  User Harry, also using adminuser as a sub group

  User sarah, can not access the SHELL which is interactive in the system, and is not a member of adminuser, natashaharrysarah password is redhat.

  Correct Answer: Check the anser in explanation.

  groupadd adminuser useradd natasha -G adminuser useradd haryy -G adminuser useradd sarah -s /sbin/nologin Passwd user name // to modify password or echo redhat | passwd --stdin user name id natasha // to view user group.

• Question 110:

  Create a user alex with a userid of 3400. The password for this user should be redhat.

  Correct Answer: Check the anser in explanation.

  useradd -u 3400 alex

  passwd alex

  su -alex