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NEW QUESTION 1
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 Security Web Service
Configure
a TLS encryption for the site http://systeml.domain11.example.com, encrypt/, get a signed certificate from http://host.domain11.example.com/materials/system1.crt.
Get
the certificate key from http://host.domain11.example.com/materials/system1.key. Get the signature authorization information of the certificate from http://host.domain11.example.com/materials/domain11.crt
Solution:
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 2
There were two systems:
system1, main system on which most of the configuration take place
system2, some configuration here
Webpage content modification.
Implement website for serverX.examp">http://serverX.example.com/owndir
Create a directory named as “owndir” under the document root of webserver
Download station.network0.example.com/pub">
http://station.network0.example.com/pub/rhce/restrict.html
Rename the file into ondex.html
The content of the owndir should be visible to everyone browsing from your local system but should not be accessible from other location
Solution:
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 3
There were two systems:
system1, main system on which most of the configuration take place
system2, some configuration here
Configure repository.
Create a Repository for your virtual machines. The URL is http://station.network.0.example.com/content/rhel7.0/x86_64/dvd
Solution:
Save and Exit (:wq) Then run this:
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 4
According to the following requirements, deploy your ftp login rule:
Users in example.com domain must be able to login to your ftp server as an anonymous user.
But users outside the example.com domain are unable to login to your server
Solution:
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 5
Configure a mail alias to your MTA, for example, send emails to harry but mary actually is receiving emails. Answer:
Please see explanation
Solution:
Notice:
This problem is a trap. The question no 31 requires that harry must be able to receive remote emails but the problems in the question no 32 requires mary to receive harry’s emails. So harry must be added when you are deploying aliases.
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 6
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.
Create a script to add users
Create a script named /root/mkusers on the system1, this script can achieve to add local users for the system1,
and user names of these users are all from a file which contains the usernames list, and meet the following requirements at the same time:
This script is required to provide a parameter; this parameter is the file which contains the usernames list
This script need provide the following message: Usage/root/mkusers if it does not provide a parameter,
then exit and return the corresponding value
This script need provide the following message: Input file not found if it provides a name that does not exist, then exit and return the corresponding value
Create a user shell log into /bin/false
This script does not need to set password for users
You can get the usernames list from the following URL as a test:
http://rhgls. domain11.example.com/materials/ userlist
Solution:
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 7
There were two systems:
system1, main system on which most of the configuration take place
system2, some configuration here
SSH configuration.
Configure SSH access on your virtual hosts as follows.
Clients within my22ilt.org should NOT have access to ssh on your systems
Solution:
Save and Exit (:wq) Then run this:
Optional:
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 8
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 station.network0.example.c">
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
Solution:
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 9
Download
file from http://ip/dir/restircted.html, and the local user harry can access it by http://station.domain30.example.com/restircted.html, and cannot be accessed by t3gg.com.
Solution:
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 10
Whoever creates the files/directories on /storage group owner should be automatically should be the same group owner of /storage.
Solution:
chmod g+s /storage
Verify using: ls -ld /stora Note:
Permission should be like:
drwxrws--- 2 root sysusers 4096 Mar 16 18:08 /storage If SGID bit is set on directory then who every users creates the files on directory group owner automatically the owner of parent directory.
To set the SGID bit: chmod g+s directory
To Remove the SGID bit: chmod g-s directory
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 11
Whoever creates the file on /data make automatically owner group should be the group owner of /data directory.
Solution:
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---
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 12
Configure an email server domain30.example.com, and it requests to send and receive emails from the local server or the user harry can send or receive emails from network. The email of user harry is
/var/spool/mail/harry. Please note: the DNS server has already been MX record analyzed.
Solution:
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 13
Create the users named jeff, marion, harold
Solution:
useradd jeff
useradd marion
useradd harold
Note:
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.
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 14
There were two systems:
system1, main system on which most of the configuration take place
system2, some configuration here
Customize the User Environment
Create a command called qstat on both serverX and desktop.
It should be able to execute the following command (ps –eo pid, tid, class, rtprio, ni, pri, psr, pcpu, stat, wchan:14, comm).
The command should be executable by all users.
Solution:
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 15
Prevent Mary from performing user configuration tasks in your system.
Solution:
Conclusions:
1. I find that it is common to add various service access limits in the exam RHCE. The exercises like: require
one network segment can be accessed another network segments can not be accessed, the following are some conclusions for various service:
tcp_wrappers:/etc/hosts.allow,/etc/hosts.deny
tcp_wrappers can filter the TCP’s accessing service. TCP whether has the filtering function which depends on this service whether use the function library of tcp_wrappers, or this service whether has the xinetd process of starting function of tcp_wrappers. tcp_wrappers’s main configuration file is /etc/hosts.allow,/etc/hosts.deny.
And the priority of the documents in hosts. allow is higher than hosts. deny. Visit will be passed if no match was found.
sshd,vsftpd can use the filtering service of tcp_wrappers. Configuration example:
Notice:
The two configuration files’ syntax can refer to hosts_access (5) and hosts_options(5) sshd_config
There are four parameters in this configuration file: DenyUsers, AllowUsers, DenyGroups, AllowGroups, they are used to limit some users or user groups to proceed Remote Login through the SSH. These parameters’ priority level is DenyUsers->AllowUsers->DenyGroups->AllowGroups
Configuration example:
httpd Service
Through the /etc/httpd/conf/httpd.conf in parameters, can add <Directory> to control the url access. Just as:
Notice:
So pay attention, deny’s and allow’s priority level in order deny,allow is: the backer has the higher priority level. But here, allow’s priority has a higher priority level.
nfs Service
nfs service directly control the visits through file /etc/exports, just as:
samba Service
Parameter hosts allow in /etc/samba/smb.conf which is used as Access Control, just as:
2. Paying attention to use Mount parameters: _netdev,defaults when you are mounting ISCSI disk.
3. Stop the NetworkManager
/etc/init.d/NetworkManager stop chkconfig NetworkManager off
4. When you are deploying ifcfg-ethX, add parameters: PEERDNS=no
5. Empty the firewall in RHCSARHCE:
6. Narrow lv steps:
7. Mount the using command - swap which is newly added in /etc/fstab
8. If Verification is not passed when you are installing software, can import public key: rpm import
/etc/pki/rpm…/…release and so on. In yum.repo, you also can deploy gpgkey, for example, gpgkey=/etc/pki/rpm…/…release
9. When you are using “Find” command to search and keep these files, paying attention to use cp -a to copy files if you use user name and authority as your searching methods.
Does this meet the goal?
- A. Yes
- B. Not Mastered
Answer: A
NEW QUESTION 16
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