RH302 Exam
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2021 Apr RH302 exam answers
Q71. CORRECT TEXT
Deny the ALL services to the member of cracker.org but allow to trusted.cracker.org.
Answer and Explanation:
1. vi /etc/hosts.deny
ALL:.cracker.org EXCEPT trusted.cracker.org
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.
Q72. 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.
Q73. CORRECT TEXT
One Package named zsh is dump on ftp://server1.example.com under /pub/updates directory and your FTP server is 192.168.0.254. Install the package zsh.
Answer and Explanation:
1. rpm -ivh ftp://server1/example.com/pub/updates/zsh-*
or
1. Login to ftp server : ftp ftp://server1.example.com using anonymous user.
2. Change the directory: cd pub and cd updates
3. Download the package: mget zsh-*
4. Quit from the ftp prompt : bye
5. Install the package
6. rpm -ivh zsh-*
7. Verify Either package installed or not : rpm -q zsh
Q74. CORRECT TEXT
There are mixed lots of System running on Linux and Windows OS. Some users are working on Windows Operating System. There is a /data directory on linux server should make available on windows to only user1 and user2 users with full access. Configure to make available.
Answer and Explanation:
1. vi /etc/samba/smb.conf
[global]
netbios name=station?
workgroup = mygroup
server string=Share from Linux Server
security=user
smb passwd file=/etc/samba/smbpasswd
encrypt passwords=yes
[data]
path=/data
writable=yes
public=no
browsable=yes
valid users=user1 user2
2. smbpasswd -a user1
3. smbpasswd -a user2
4. service smb start | restart
5. chkconfig smb on
Samba servers helps to share the data between linux and windows. Configuration file is /etc/samba/smb.conf. There are some pre-defined section, i. global à use to define the global options, ii. Printers à use to share the printers, iii. homes à use the share the user's home directory.
Security=user à validation by samba username and password. May be there are other users also.
To allow certain share to certain user we should use valid users option.
smbpasswd à Helps to change user's smb password. -a option specifies that the username following should be added to the local smbpasswd file.
Q75. CORRECT TEXT
You have ftp site named ftp.example.com. You want to allow anonymous users to upload files on you ftp site. Configure to allow anonymous to upload the files.
Answer and Explanation:
1. vi /etc/vsftpd/vsftpd.conf
anon_upload_enable=yes
chown_uploads=yes
chown_username=username
2. service vsftpd start| restart
3. directory owner should be ftp user: chown ftp directory path allowed to upload files.
4. Write permission should be set to owner user.
By default anonymous user can only download files from the ftp. Should write
anon_upload_enable=yes to enable anonymous upload files. Default Directory for anonymous is /var/ftp.
Down to date RH302 free practice test:
Q76. CORRECT TEXT
The System you are using is for NFS (Network File Services). Some important data are shared from your system. Make automatically start the nfs and portmap services at boot time.
Answer and Explanation:
We can control the services for current session and for next boot time also. For current Session, we use service servicename start or restart or stop or status. For automatically on next reboot time:
1. chkconfig servicename on or off
eg: chkconfig nfs on
chkconfig portmap on
or
ntsysv
Select the nfs and portmap services.
2. Reboot the system and identify whether services are running or not.
Q77. CORRECT TEXT
Install the Redhat Linux RHEL 4 through NFS. Where your Server is server1.example.com having IP 172.24.254.254 and shared /var/ftp/pub. The size of the partitions are listed below:
/ à 1048
/home à 1028
/boot à 512
/var à 1028
/usr à 2048
Swap -> 1.5 of RAM Size
/archive à configure the RAID Level 0 of remaining all free space.
After completing the installation through NFS solve the following questions. There are two networks 172.24.0.0/16 and 172.25.0.0/16. As well as there are two domains example.com on 172.24.0.0/16 network and my133t.org on 172.25.0.0/16 network. Your system is based on example.com domain.
Answer and Explanation:
1. Insert the CD on CD-ROM and start the system.
2. In Boot: Prompt type linux askmethod
3. It will display the language, keyboard selection.
4. It will ask you for the installation method.
5. Select the NFS Image from the list
6. It will ask the IP Address, Net mask, Gateway and Name Server. Select Use
Dynamic IP Configuration: because DHCP Server will be configured in your exam lab.
7. It will ask for the NFS Server Name and Redhat Enterprise Linux Directory.
Specify the NFS Server: 172.24.254.254
Directory: /var/ftp/pub
8. After Connecting to the NFS Server Installation start in GUI. Go up to the partition screen by selecting the different Options.
9. Create the partition According to the Question because Size and what-what partition should you create at installation time is specified in your question
10. Create the two RAID partitions having equal size of remaining all free space.
11. Click on RAID button
12. Type mount point /archive
13. Select RAID Level 0
14. Click on ok
15. Then select the MBR Options, time zone and go upto package selections.
It is another Most Important Time of installation. Due to the time limit, you should care about the installation packages. At Exam time you these packages are enough.
X-Window System
GNOME Desktop
(these two packages are generally not required)
Administration Tools.
System Tools
Windows File Server
FTP Servers
Mail Servers
Web Servers
Network Servers
Editors
Text Based Internet
Server Configuration Tools
Printing Supports
When installation will complete, your system will reboot. Jump for another Question.
Q78. CORRECT TEXT
One NIS Domain named rhce.com is configured in your lab, server is 192.168.0.254. rhce100, rhce200,rhce300 user are created on domain server.
Make your system as a member of rhce.com domain. Make sure that when nis user login in your system home directory should get by them. Home directory is separately shared on server eg /home/stationx/ where x is you station number.
Answer and Explanation:
1. use the authconfig or system-config-authentication
2. Select the [*] USE NIS
3. Type the NIS Domain: rhce.com
4. Type Server 192.168.0.254 then click on next and ok
5. You will get a ok message.
6. vi /etc/auto.master and write at the end of file
/home/stationx /etc/auto.home --timeout=60
7. vi /etc/auto.home and write
* -rw,soft,intr 192.168.0.254:/home/stationx/&
Note: please specify your station number in the place of x.
8. Service autofs restart
9. Login as the rhce1 or rhce2 or rhce3 on another terminal will be Success.
According to question, rhce.com domain is already configured. We have to make a client of rhce.com domain and automatically mount the home directory on every client. To make a member of domain, we use the autheconfig or system-config-authentication command. There are lots of authentication server i.e NIS, LDAB, SMB etc. NIS is a RPC related Services, no need to configure the DNS, we should specify the NIS server address.
Here Automount feature is available. When user tried to login, home directory will automatically mount. The automount service reads the configuration from /etc/auto.master file.
On /etc/auto.master file we specified the mount point the configuration file for mount point.
Q79. CORRECT TEXT
Make Successfully Resolve to server1.example.com where DNS Server is 192.168.0.254.
Answer and Explanation:
1. vi /etc/resolv.conf
Write : nameserver 192.168.0.254
Q80. CORRECT TEXT
Boot your System Successfully on run level 3.
Answer and Explanation:
After completing the Boot loader problem, you will boot the system, but it goes to emergency mode. Remember that if System boots on Emergency mode that means file system problem.
You will get the Shell, remount the / filesystem with read and write mode.
1. First Find out the / filesystem using e2lable /dev/hda1, e2lable /dev/hda2 etc
2. mount -o remount,defaults /dev/hda? /
3. vi /etc/fstab
You will get like:
/root / ext3 defaults 1 1
or / /root ext3 defaults 1 1
4. Edit the file like:
/ / ext3 defaults 1 1
5. Configure the /etc/grub.conf file if just booting system by editing grub from grub prompt.
6. Reboot the system.