This is a sample exam that I’ve created after finishing RHCE studies. It is to prepare for the RHCE exam based on RHEL 7, which I have yet to take.
[Update August 2016]: I have passed the RHCE exam.
There are 20 questions in total. You will need three RHEL 7 (or CentOS 7) virtual machines to be able to successfully complete all questions. I recommend registering with RedHat and downloading a RHEL 7 iso image free of charge.
One VM has to be configured as a FreeIPA server to provide LDAP, Kerberos, NTP and DNS services. Note that in our case the FreeIPA server will also provide FTP services. Other two VMs will be used to solve the sample exam questions. These VMs need to have two network interfaces for link aggregation. They also need to have a RHEL DVD (.iso file) attached.
Tips and Suggestions
Read all questions and try to understand the whole picture of what is required.
Spend 10 minutes identifying packages that you are going to need, and then install everything in one go – this will provide you with a solid base to build on.
Enable all required services. Also, setup firewalld rules for any services that require them.
You obviously need to have a repository configured before you can install packages. However, in this particular case we use a locally mounted RHEL DVD image meaning that no network is required before we can install packages. This may not be the case on a real RHCE exam and you may need to set up networking in advance in order to get access to a repository.
If you can complete all 20 questions in less than 3 hours, then you are a full fledged shinobi and likely OK to take the Chunin exam.
Sample Exam Questions
It is assumed that you use the following details.
- Server1: srv1.rhce.local
- Server2: srv2.rhce.local
IP addresses and networking:
- Server1: 10.8.8.71/24
- Server2: 10.8.8.72/24
- Name server: 10.8.8.70
- Gateway: 10.8.8.70
Once you configure networking with the details above, you will be able to resolve the following domains successfully (as they’re set up on the FreeIPA/DNS server):
The following LDAP (FreeIPA) users are available for testing:
Before you begin, reset the root user password to pass on both servers, server1 and server2.
1. Configure SELinux
Configure server1 and server2 to have SELinux running in enforcing mode.
Configure a repository on server1 and server2. Use the RHEL 7 DVD that’s available on
/dev/cdrom on both machines. The changes should persist after reboot.
Configure server1 and server2 for link aggregation, which watches for link changes and selects an active port for data transfers. The server1 should use the address of 10.8.8.71/24. The server2 should use the address 10.8.8.72/24. The gateway and the name server address is 10.8.8.70. The changes should persist after reboot.
Configure the “dmz” firewalld zone to be the default zone on both servers server1 and server2, and ensure that the the aggregated network connection uses to the default zone.
4. IPv6 Network
Configure previously configured aggregated network links with static IPv6 addresses. The changes should persist after reboot.
Configure a static IPv6 address on the server1 as fc00::a:b:c:71/64. Configure a static IPv6 address on the server2 as fc00::a:b:c:72/64.
Configure server1 and server2 to synchronise time with the NTP server ipa.rhce.local.
Configure server1 as a null client to relay email from local system through ipa.rhce.local. All outgoing mail have their sender domain as rhce.local.
Configure server1 to be a router. Also ensure that the server1 reboots automatically after 300 seconds in case of a kernel panic. The changes should persist after reboot.
Configure server1 and server2 for Kerberos authentication.
Use the following LDAP authentication details:
- Server: ipa.rhce.local
- Base DN: dc=rhce,dc=local
- LDAP cacert is available on ftp://ipa.rhce.local/pub/cacert.p12
There is an LDAP user alice created on the FreeIPA server, use it for testing.
Use the following Kerberos authentication details:
- Realm: RHCE.LOCAL
- KDC: ipa.rhce.local
- Admin Server: ipa.rhce.local
To test, you can obtain a Kerberos ticket for the user alice.
9. NFS Server
Configure server1 to provide a Kerberised NFSv4 share.
Set up a Kerberised NFSv4 share
/srv/nfssec in a read-write mode and share it to the client srv2.rhce.local only. Enable krb5p security to secure access to the NFS share from URI ftp://ipa.rhce.local/pub/srv1.keytab. The owner of the share must be LDAP user alice.
10. NFS Mount
Configure server2 to mount a Kerberised NFSv4 share.
Mount Kerberised NFSv4 share
/mnt/protected directory persistently at boot time provided with the keytab ftp://ipa.rhce.local/pub/srv2.keytab. LDAP user alice should be able to write to the share.
11. MariaDB Server
Configure server2 to meet the following requirements.
Set up a default secure MariaDB database called shop with a user john with all privileges. The user john must be identified by “pass”. In this database, create one simple table with the name products that allows to store names varchar(20) and their prices int(10). Enter two products. Backup the database with mysqldump to
MariaDB must listen on a TCP port 5555 with a dataroot on
/srv/mariadb. Firewall should allow access to port 5555 from srv1.rhce.local only. The MariaDB root password must be “pass”.
12. Samba Server
Configure server1 to provide a Samba share. Share
/srv/smb_docs directory via SMB. The SMB server must be a member of the DEVOPS workgroup. The share name must be docs. Only the host srv2.rhce.local should be allowed to connect to the docs share. The docs share must be browseable but not writable nor printable. User vince must have read-write access to the docs share, authenticating with the password “pass”.
Ensure that SELinux allows sharing of home directories.
13. Samba Mount
Configure server2 to mount a Samba share. Mount the Samba share docs permanently on
/mnt/samba as a multi-user mount. The share should be mounted with the credentials of vince.
14. Port Forwarding
Configure server2 to forward incoming traffic on port 8080/tcp to 10.8.8.71:80 (srv1.rhce.local:80).
Also configure server2 for firewalld SSH logging with a prefix of “SSH_” and a debug level, limit to 2 per minute. The changes should persist after reboot.
15. iSCSI Target
Configure server1 to provide iSCSI LUNs. Set up an iSCSI target with CHAP authentication (username=client/password=client) based on a fileio backstore
/srv/iscsifile of 200MB. The logical block name should be file1. A local file system cache must be disabled to reduce the risk of data loss.
Also set up an LVM based block backstore of 100MB called lv_iscsi (use a volume group of your choice). The logical block name should be block1.
Use the IQN of iqn.2003-01.local.rhce:srv1 for the iSCSI server, apply standard firewall configuration. Create LUNs for both backstores, ensure the LUNs are available to the client iqn.2003-01.local.rhce:srv2.
16. iSCSI Initiator
Configure server2 as an iSCSI initiator. Use the IQN of iqn.2003-01.local.rhce:srv2 for it.
The datastore block1 should be formated as ext4 and mounted permanently on
The datastore file1 should be added to a new LVM volume group vg_san, a new 50MB logical volume lv_lun1 should be created, formatted as xfs, and mounted permanently on
Configure server1 to meet all of the following requirements.
17.1 Secure Webserver
Configure a webserver for the site http://srv1.rhce.local. The webpage should say “hello”.
Also configure website http://srv1.rhce.local with TLS. Generate a self-signed certificate, the only requirement for the certificate is to match the webserver name srv1.rhce.local. Make sure that SSLv2 and SSLv3 protocols are disabled.
The content of the websites should be visible to everyone browsing from the localhost but should not be accessible from any other location.
17.2 Webpage Content Modification
Implement a website for http://srv1.rhce.local/group. Create a directory “group” under the document root used for the website. The webpage should say “group”.
The webpage must be configured for group-based authentication and require users to login. Only user alice, who is a member of the devops group, should be allowed to access the website with a password “password”.
17.3. Virtual Hosting
Setup a virtual host http://vhost1.rhce.local with the alternate document root under
/srv/www/vhost1. The webpage should say “vhost1”. The webpage must be configured for user-based authentication. Only user alice should be allowed to login with a password “password”.
Note: the other websites configured on the server1 must still be accessible.
17.4. Dynamic Content Configuration
Configure website http://dynamic1.rhce.local:8888/ with the document root
/srv/www/scripts to serve a PHP application. The site should execute index.php. The PHP application is provided on ftp://ipa.rhce.local/pub/index.php. Content of the script should not be modified.
Note: the PHP application won’t work until you have a MariaDB server configured as per task #11.
18. Name Server
Configure server1 as a caching-only DNS server to forward DNS queries. Forward all requests (zone for the root . domain) to another DNS server 10.8.8.70. External access to the DNS server should only be allowed from srv2.rhce.local.
Configure server1 to meet the following requirements.
SSH should listen on ports 22 and 2222. Firewall should allow access to port 2222 from srv2.rhce.local only. Client ipa.rhce.local must not have access to SSH at all. Enable password and key authentication. The changes should persist after reboot.
Configure server2 for passwordless root authentication against the server1.
Create a script on the server1 called
/root/newusers. When the script is called with an argument users.txt, it should add all the users from the file. Download the file from ftp://ipa.rhce.local/pub/users.txt.
All users should have the login shell as /sbin/nologin, password is 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/newusers users.txt”