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2021 Mar RH302 torrent

Q121. CORRECT TEXT

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.

Answer and Explanation:

1. vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

BOOTPROTO=static

ONBOOT=yes

IPADDR=x.x.x.x

NETMASK=x.x.x.x

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

3. Enter Subnet Mask

4. Enter Default Gateway and primary name server

5. press on ok

6. ifdown eth0

7. ifup eth0

8. 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.

Q122. CORRECT TEXT

Create the user named jackie, curtin, david

Answer and Explanation:

1. useradd jackie

2. useradd curtin

3. useradd david

useradd command is used to create the user. All user's information stores in /etc/passwd and user;s shadow password stores in /etc/shadow.

Q123. CORRECT TEXT

Any mail coming for accountmanager should get by jeff user.

Answer and Explanation:

1. vi /etc/mail/virtusertable

accountmanager@ jeff

2. service sendmail restart

Q124. CORRECT TEXT

Configure to allow the ssh service only from 192.168.0.0/24 except 192.168.0.4

Answer and Explanation:

1. vi /etc/hosts.deny

sshd: 192.168.0. EXCEPT 192.168.0.4

We can secure the services using tcp_wrappers. There are main two files, /etc/hosts.allow and /etc/hosts.deny.

There will be three stage access checking

-Is access explicitly permitted? Means permitted from /etc/hosts.allow?

- Otherwise, Is access explicitly denied? Means denied from /etc/hosts.deny?

- Otherwise, by default permit access if neither condition matched.

To deny the services we can configure /etc/hosts.deny file using ALL and EXCEPT operation.

Pattern of /etc/hosts.allow and /etc/hosts.deny file is:

Demon_list:client_list:options

In Client list can be either domain name or IP address.

Q125. CORRECT TEXT

If root sends the mail to jane, mail should be send to /var/spool/mail/jane.

Answer and Explanation:

By default all mails to user will send to user's spool directory. Nothing to do.

Up to the minute RH302 answers:

Q126. CORRECT TEXT

You have a domain named www.rhce.com associated IP address is 192.100.0.2. Configure the Apache web server by implementing the SSL for encryption communication.

Answer and Explanation:

1. vi /etc/httpd/conf.d/ssl.conf

ServerName www.rhce.com

DocumentRoot /var/www/rhce

DirectoryIndex index.html index.htm

ServerAdmin webmaster@rhce.com

SSLEngine on

SSLCertificateFile /etc/pki/tls/certs/localhost.crt

SSLCertificateKeyFile /etc/pki/tls/private/localhost.key

</VirtualHost>

2. cd /etc/httpd/conf

3. make testcert

4. Create the directory and index page on specified path. (Index page can download from

ftp://server1.example.com at exam time)

Check the SELinux context of index page , should like this:

-rw-r--r-- root root system_u:object_r:httpd_sys_content_t /var/www/html/index.html

If SELinux Context is mismatched, use the restorecon -R /var command

5. service httpd start|restart

6. chkconfig httpd on

Apache can provide encrypted communications using SSL (Secure Socket Layer). To make use of encrypted communication, a client must request to https protocol, which is uses port 443. For HTTPS protocol required the certificate file and key file.

Q127. CORRECT TEXT

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

Answer and Explanation:

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 at 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

Q128. CORRECT TEXT

Your System is going to use as a Router for two networks. One Network is 192.168.0.0/24 and Another Network is 192.168.1.0/24. Both network's IP address has assigned. How will you forward the packets from one network to another network?

Answer and Explanation:

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

2. vi /etc/sysctl.conf

net.ipv4.ip_forward = 1

If you want to use the Linux System as a Router to make communication between different networks, you need enable the IP forwarding. To enable on running session just set value 1 to /proc/sys/net/ipv4/ip_forward. As well as automatically turn on the IP forwarding features on next boot set on /etc/sysctl.conf file.

Q129. CORRECT TEXT

Your Local Domain is example.com. Configure the send mail server for you local LAN. As well as enable the pop and pop secured protocol.

Answer and Explanation:

1. vi /etc/mail/local-host-names

example.com

2. vi /etc/mail/sendmail.mc

dnl # DEAMON_OPTIONS(`Port=smtp,Addr=127.0.0.1,Name=MTA`)dnl

3. m4 /etc/mail/sendmail.mc >/etc/mail/sendmail.cf

4. vi /etc/mail/access

192.168.0 RELAY

example.com RELAY

5. service sendmail start | restart

6. chkconfig dovecot on

7. vi /etc/dovecot.conf

protocols = pop3 pop3s

8. service dovecot start | restart

9. chkconfig dovecot on

/etc/mail/local-host-names file contains the aliases to hostname. Mail server program reads the

/etc/mail/sendmail.cf. To change the configuration on mail server, we should edit the

/etc/mail/sendmail.mc file and should generate the sendmail.cf using m4 command.

By default sendmail server allows to connect to local host only. So we should edit the

/etc/mail/sendmail.mc file to allow connect to other hosts.

By default sendmail server will not forward mail. we should specify on /etc/mail/access to relay or to block mail coming from domain or network or individual email address.

By default dovecot service start only the imap protocol. To start pop protocol with dovecot, we should write in /etc/dovecot.conf file.

Q130. CORRECT TEXT

Create the partition having 100MB size and mount it on /mnt/neo

Answer and Explanation:

1. Use fdisk /dev/hda à To create new partition.

2. Type n à 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 à 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? Where ? is your partition number

10. Or

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

12. mkdir /mnt/neo

13. vi /etc/fstab

14. Write:

15. /dev/hda? /mnt/neo ext3 defaults 1 2

16. Verify by mounting on current Sessions also:

17. mount /dev/hda? /mnt/neo

2021 Mar RH302 torrent

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