Red Hat EX300 Online Practice Questions and Exam Preparation

Red Hat EX300 Online Questions & Answers

• Question 1:

  SIMULATION

  RHCE Test Configuration Instructions

  Information for the two systems you will use in test is the following:

  system1.group3.example.com: is one of the main sever. system2.group3.example.com: mainly used as a client.

  Password for both of the two systems is atenorth

  System's IP is provided by DHCP, you can regard it as normal, or you can reset to Static IP in accordance with the following requirements:

  system1.group3.example.com: 172.24.3.5

  system2.group3.example.com: 172.24.3.10

  The subnet mask is 255.255.255.0

  Your system is a member of DNS domain group3.example.com. All systems in DNS domain group3.example.com are all in subnet 172.24.3.0/255.255.255.0, the same all systems in this subnet are also in group3.example.com, unless

  specialized, all network services required to be configured can be accessed by systems of domain group3.

  host.group3.example.com provides a centralized authentication service domain

  GROUP3.EXAMPLE.COM, both system1 and system2 have already been pre-configured to be the client for this domain, this domain provides the following user account:

  

  Firewall is enabled by default, you can turn it off when deemed appropriate, other settings about firewall may be in separate requirements.

  Your system will be restarted before scoring, so please ensure that all modifications and service configurations you made still can be operated after the restart without manual intervention, virtual machine instances of all examinations must be able to enter the correct multi-user level after restart without manual assistance, it will be scored zero if the test using virtual machine system cannot be restarted or be properly restarted.

  Corresponding distribution packages for the testing using operating system Red Hat Enterprise Linux version can be found in the following link: http://server1.group3.example.com/rhel

  Part of the requirements include host security, ensure your host security limit does not prevent the request to allow the host and network, although you correctly configured the network service but would have to allow the host or network is blocked, this also does not score.

  You will notice that some requirements which clearly do not allow services be accessed by service domain my133t.org, systems of this domain are in subnet 172.25.1.0/252.255.255.0, and systems of these subnets also belong to my 133t.org domain.

  PS: Notice that some test questions may depend on other exam questions, for example, you might be asked to perform a series of restrictions on a user, but this user creation may be required in other questions. For convenient identification, each exam question has some radio buttons to help you identify which questions you have already completed or not completed. Certainly, you do not need to care these buttons if you don't need them.

  Implement/configure a Web Service.

  Configure a site http://systeml. domain11.example.com/ on the system1, then execute the following steps:

  (1)

  Download file from http://rhgls.domain11.example.com/materials/station.html and rename this files index.html, don't modify the file contents; (2) Copy the file index.html to your web server's DocumentRoot directory

  (3)

  Clients from domain group3.example.com can access to this web service

  (4)

  Clients from domain my133t.org deny access to this web service

  A. explanation
  A. explanation

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  systemctl restart firewalld

• Question 2:

  SIMULATION

  Whoever creates the file on /data make automatically owner group should be the group owner of /data directory.

  A. explanation
  A. explanation

  ---

  When user creates the file/directory, user owner will be user itself and group owner will be the primary group of the user. There is one Special Permission SGID, when you set the SGID bit on directory. When users create the file/directory automatically owner group will be same as a parent.

  1.

  chmod g+s /data

  2.

  Verify using: ls -ld /data You will get: drwxrws--

• Question 3:

  SIMULATION

  One Package named zsh is dump on ftp://server1.example.com under pub directory. Install the package from ftp server.

  A. explanation
  A. explanation

  ---

  1.

  rpm -ivh ftp://server1.example.com/pub/zsh-*

  2.

  Package will install

  rpm command is used to install, update and remove the package, -i means install, -v means verbose and -h means display the hash mark.

• Question 4:

  SIMULATION

  Give Full Permission to owner user and owner group member but no permission to others on /data.

  A. explanation
  A. explanation

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  We can change the permission of file/directory either character symbol method or numeric method. Permission: r-Read w-Write x-Execute Permission Category u- Owner User g- Owner Group o- Others Operators + -> Add the Permissions - ->Remove the Permissions = ->Assign the Permissions Numeric Method: 4 -> Read 2 -> Write 1 -> Execute Total: 7, total for owner user, owner group member and for others: 777

  1.

  chmod u+rwx /data

  2.

  chmod g+rwx /data

  3.

  chmod o-rwx /data or chmod 770 /data

  4.

  Verify the /data: ls -ld /data 5 .You will get drwxrwx--

• Question 5:

  SIMULATION

  Install the Cron Schedule for jeff user to display "Hello" on daily 5:30.

  A. explanation
  A. explanation

  ---

  1.

  Login as a root user

  2.

  cat >schedule.txt 30 05 * * * /bin/echo "Hello"

  3.

  crontab -u jeff schedule.txt

  4.

  service crond restart

  The cron system is essentially a smart alarm clock. When the alarm sounds, Linux runs the commands of your choice automatically. You can set the alarm clock to run at all sorts of regular time intervals. Alternatively, the system allows you to run the command of your choice once, at a specified time in the future. Red Hat configured the cron daemon, crond. By default, it checks a series of directories for jobs to run, every minute of every hour of every day. The crond checks the / var/spool/cron directory for jobs by user. It also checks for scheduled jobs for the computer under /etc/crontab and in the /etc/cron.d directory. Here is the format of a line in crontab. Each of these columns is explained in more detail: #minute, hour, day of month, month, day of week, command * * * * * command Entries in a crontab Command Line Field Value Minute 0-59 Hour Based on a 24-hour clock; for example, 23 = 11 p.m. Day of month 1-31 Month 1-12, or jan, feb, mar, etc. Day of week 0-7; where 0 and 7 are both Sunday; or sun, mon, tue, etc. Command: The command you want to run

• Question 6:

  SIMULATION

  There are Mail servers, Web Servers, DNS Servers and Log Server. Log Server is already configured. You should configure the mail server, web server and dns server to send the logs to log server.

  A. explanation
  A. explanation

  ---

  According to question, log server is already configured. We have to configure the mail, web and dns server for log redirection. In mail, web and dns server:

  1.

  vi /etc/syslog.conf mail.* @logserveraddress

  2.

  service syslog restart

  mail is the facility and * means the priority. It sends logs of mail services into log server.

• Question 7:

  SIMULATION

  There were two systems: system1, main system on which most of the configuration take place system2, some configuration here SMTP Configuration. Configure the SMTP mail service on serverX and desktopX which relay the mail only from local system through station.network0.example.com, all outgoing mail have their sender domain as example.com. Ensure that mail should not store locally. Verify the mail server is working by sending mail to a natasha user. Check the mail on both serverX and desktopX with the below URL http://station.network0.example.com/system1 http://station.network0.example.com/system2

  A. explanation
  A. explanation

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• Question 8:

  SIMULATION

  One Logical Volume is created named as myvol under vo volume group and is mounted. The Initial Size of that Logical Volume is 400MB. Make successfully that the size of Logical Volume 200MB without losing any data. The size of logical volume 200MB to 210MB will be acceptable.

  A. explanation
  A. explanation

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• Question 9:

  SIMULATION

  RHCE Test Configuration Instructions

  Information for the two systems you will use in test is the following:

  system1.group3.example.com: is one of the main sever. system2.group3.example.com: mainly used as a client.

  Password for both of the two systems is atenorth

  System's IP is provided by DHCP, you can regard it as normal, or you can reset to Static IP in accordance with the following requirements:

  system1.group3.example.com: 172.24.3.5

  system2.group3.example.com: 172.24.3.10

  The subnet mask is 255.255.255.0

  Your system is a member of DNS domain group3.example.com. All systems in DNS domain group3.example.com are all in subnet 172.24.3.0/255.255.255.0, the same all systems in this subnet are also in group3.example.com, unless

  specialized, all network services required to be configured can be accessed by systems of domain group3.

  host.group3.example.com provides a centralized authentication service domain

  GROUP3.EXAMPLE.COM, both system1 and system2 have already been pre-configured to be the client for this domain, this domain provides the following user account:

  

  Firewall is enabled by default, you can turn it off when deemed appropriate, other settings about firewall may be in separate requirements.

  Your system will be restarted before scoring, so please ensure that all modifications and service configurations you made still can be operated after the restart without manual intervention, virtual machine instances of all examinations must be

  able to enter the correct multi-user level after restart without manual assistance, it will be scored zero if the test using virtual machine system cannot be restarted or be properly restarted.

  Corresponding distribution packages for the testing using operating system Red Hat Enterprise Linux version can be found in the following link:

  http://server1.group3.example.com/rhel

  Part of the requirements include host security, ensure your host security limit does not prevent the request to allow the host and network, although you correctly configured the network service but would have to allow the host or network is

  blocked, this also does not score.

  You will notice that some requirements which clearly do not allow services be accessed by service domain my133t.org, systems of this domain are in subnet 172.25.1.0/252.255.255.0, and systems of these subnets also belong to my 133t.org

  domain.

  PS: Notice that some test questions may depend on other exam questions, for example, you might be asked to perform a series of restrictions on a user, but this user creation may be required in other questions. For convenient identification,

  each exam question has some radio buttons to help you identify which questions you have already completed or not completed. Certainly, you do not need to care these buttons if you don't need them.

  Configure the SSH Access as required:

  Users can visit your two virtual machine systems via clients of domain group3.example.com through SSH remote.

  A. explanation
  A. explanation

  ---

  Solution 1:

  Modify file /etc/hosts.allow

  Add a line: sshd: 172.24.11.

  Modify file /etc/hosts.deny

  Add a line: sshd: 172.25.0.

  Both of them need to be configured.

  Solution 2:

  Add a firewall

  firewall-cmd –zone=block --add-source=172.25.11.0/24 --permanent firewall-cmd –reload Both of them need to be configured

• Question 10:

  SIMULATION

  There were two systems: system1, main system on which most of the configuration take place system2, some configuration here

  Script2. Create a script on serverX called /root/createusers When this script is called with the argument, it should add all the users from the file Download the file from http://station.network0.example.com/pub/testfile All users should have the login shell as /bin/false, password not required When this script is called with any other argument, it should print the message as "Input File Not Found" When this script is run without any argument, it should display "Usage:/root/createusers" NOTE: if the users are added no need to delete

  A. explanation
  A. explanation

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