RH302 Exam
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2021 Apr RH302 practice test
Q121. CORRECT TEXT
Your System is configured in 192.168.0.0/24 Network and your Domain nameserver is 192.168.0.254. Make successfully resolve to server1.example.com.
Answer and Explanation:
Very Easy question, nameserver is specified in question,
1. vi /etc/resolv.conf
nameserver 192.168.0.254
2. host server1.example.com
Q122. CORRECT TEXT
Make sure on /data that only the owner user can remove files/directories.
Answer and Explanation:
By default user1 can remove user2's files due to directory permission to group member. We can prevent of deleting files from others users using Sticky Bits.chmod o+t /dataVerify /data: ls –ld /data
You will get: drwxrwx-T
Q123. CORRECT TEXT
There are two different networks 192.168.0.0/24 and 192.168.1.0/24. Where 192.168.0.254 and 192.168.1.254 IP Address are assigned on Server. Verify your network settings by pinging 192.168.1.0/24 Network's Host.
Answer and Explanation:
1. vi /etc/sysconfing/network
NETWORKING=yes
HOSTNAME=station?.example.com
GATEWAY=192.168.0.254
2. service network restart
Or
1. vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=X.X.X.X
NETMASK=X.X.X.X
GATEWAY=192.168.0.254
2. ifdown eth0
3. ifup eth0
Q124. CORRECT TEXT
Give Full Permission to owner user and owner group member but no permission to others on /data.
Answer and Explanation:
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
+ à Add the Permissions
- à Remove the Permissions
= à Assigns the Permissions
Numeric Method:
4àRead
2à Write
1àExecute
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---
Q125. 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 reboot time. For current Session, we use service servicename start or restart or stop or status. For automatically at next reboot time:
3. chkconfig servicename on or off
eg: chkconfig nfs on
chkconfig portmap on
or
ntsysv
Select the nfs and portmap services.
4. Reboot the system and identify whether services are running or not.
Rebirth RH302 practice test:
Q126. CORRECT TEXT
Add a user named user4 and make primarily belongs to training group. As well account should expire on 30 days from today.
Answer and Explanation:
useradd usernamepasswd usernameusermod -e "date"
example: usermod -e "12 Feb 2006" user4
Verify: chage -l user4
Q127. CORRECT TEXT
Successfully resolv to server1.example.com where your DNS server is 172.24.254.254
Answer and Explanation:
1. vi /etc/resolv.conf
nameserver 172.24.254.254
2. host server1.example.com
On every clients, DNS server is specified in /etc/resolv.conf. When you request by name it tries to resolve from DNS server.
Q128. CORRECT TEXT
You have a domain in your LAN named example.com and cracker.org. Allow the
- Allow the FTP connection only from local domain.
- Deny the FTP connection from cracker.org
Answer and Explanation:
1. vi /etc/hosts.deny
vsftpd:ALL EXCEPT .example.com
or
1. vi /etc/hosts.deny
vsftpd:ALL
2. vi /etc/hosts.allow
vsftpd:.example.com
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.
Q129. CORRECT TEXT
Create a RAID Device /dev/md0 by creating equal two disks from available free space on your harddisk and mount it on /data.
Answer and Explanation:
Redhat Enterprise Linux 5 Supports the RAID LEVEL 0, RAID LEVEL 1, RAID LEVEL 5 and RAID LEVEL 6 at installation time. You can create it at installation time later no need to type lots of commands for RAID.
At Installation Time:
ii. Create the partitions using diskdruid.
iii. Create the Partitions having File system Type Software RAID.
iv. Click on RAID button
v. Type the Mount Point
vi. Select File system type
vii. Select RAID Level
viii. Select Partitions/disks as a member of RAID.
viii. Click on ok
After Installation: We can create the RAID Device after Installation on command-line.
11. Create the Two partitions having equal size. (Specify the Size using Cylinder, find the
remaining cylinder and divide by 2).
12. Change the Partition ID to fd (Linux raid Autodetect) by typing t.
13. Type w à To write on partitions table.
14. Use partprobe command to synchronic the partition table.
15. Use: mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/hda? /dev/hda?
16. Verify the RAID: mdadm --detail /dev/md0
17. mkfs -t ext3 /dev/md0
18. mount /dev/md0 /data
19. vi /etc/fstab
/dev/md0 /data ext3 defaults 0 0
20. Verify mounting devices using mount command.
Q130. CORRECT TEXT
ssh service is enabled in your Server. Configure to
- Deny the ssh from cracker.org domain.
- Allow the ssh service only from example.com domain.
Answer and Explanation:
1. vi /etc/hosts.deny
sshd:ALL EXCEPT .example.com
or
1. vi /etc/hosts.deny
sshd:ALL
2. vi /etc/hosts.allow
sshd:.example.com
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.