Prepare for your Red Hat Certified Engineer (RHCE) exam

System configuration and management

• Use network teaming or bonding to configure aggregated network links between two Red Hat Enterprise Linux systems
• Configure IPv6 addresses and perform basic IPv6 troubleshooting
• Route IP traffic and create static routes
• Use firewalld and associated mechanisms such as rich rules, zones and custom rules, to implement packet filtering and configure network address translation (NAT)
• Configure a system to authenticate using Kerberos
• Configure a system as either an iSCSI target or initiator that persistently mounts an iSCSI target
• Produce and deliver reports on system utilization (processor, memory, disk, and network)
• Use shell scripting to automate system maintenance tasks

Network services

Network services are an important subset of the exam objectives. RHCE candidates should be capable of meeting the following objectives for each of the network services listed below:

• Install the packages needed to provide the service
• Configure SELinux to support the service
• Use SELinux port labeling to allow services to use non-standard ports
• Configure the service to start when the system is booted
• Configure the service for basic operation
• Configure host-based and user-based security for the service

HTTP/HTTPS

• Configure a virtual host
• Configure access restrictions on directories
• Deploy a basic CGI application
• Configure group-managed content
• Configure TLS security

DNS

• Configure a caching-only name server
• Troubleshoot DNS client issues

NFS

• Provide network shares to specific clients
• Provide network shares suitable for group collaboration
• Use Kerberos to control access to NFS network shares

SMB

• Provide network shares to specific clients
• Provide network shares suitable for group collaboration

SMTP

• Configure a system to forward all email to a central mail server

SSH

• Configure key-based authentication
• Configure additional options described in documentation

NTP

• Synchronize time using other NTP peers

Database services

• Install and configure MariaDB
• Backup and restore a database
• Create a simple database schema
• Perform simple SQL queries against a database

DNS

Caching Domain Name Service (DNS)

DNS servers comes in several types such as master, slave, forwarding and cache, to name a few examples, with cache-only DNS being the one that is easier to setup. The cache-only DNS server is also known as resolver, which will query DNS records and fetch all the DNS details from other servers, and keep each query request in its cache for later use so that when we perform the same request in the future, it will serve from its cache, thus reducing the response time even more.

https://www.tecmint.com/install-configure-cache-only-dns-server-in-rhel-centos-7/

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/linux_domain_identity_authentication_and_policy_guide/trouble-gen-dns

HTTP/HTTPS

Configure a virtual host

https://www.certdepot.net/rhel7-configure-apache-virtual-host/

https://www.linux.com/blog/multiple-virtual-hosts-centos-7-or-rhel-7

Deploy a basic CGI application

https://www.certdepot.net/rhel7-deploy-apache-basic-cgi-application/

Configure access restrictions on directories

https://www.certdepot.net/rhel7-configure-apache-private-directories/

Configure group-managed content

https://www.certdepot.net/rhel7-configure-apache-group-managed-content/

Configure TLS security

https://access.redhat.com/documentation/en-us/red_hat_jboss_a-mq/6.2/html/security_guide/fmqsecurityssl

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system_administrators_guide/ch-web_servers

Reference

https://www.redhat.com/en/services/training/ex300-red-hat-certified-engineer-rhce-exam

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system_administrators_guide/