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RHSA  

Understand and use essential tools

• Access a shell prompt and issue commands with correct syntax

• Use input-output redirection (>, >>, |, 2>, etc.)

• Use grep and regular expressions to analyze text

• Access remote systems using SSH

• Log in and switch users in multiuser targets

• Archive, compress, unpack, and uncompress files using tar, star, gzip, and bzip2

• Create and edit text files

• Create, delete, copy, and move files and directories

• Create hard and soft links

• List, set, and change standard ugo/rwx permissions

• Locate, read, and use system documentation including man, info, and files in /usr/share/doc

Operate running systems

• Boot, reboot, and shut down a system normally

• Boot systems into different targets manually

• Interrupt the boot process in order to gain access to a system

• Identify CPU/memory intensive processes and kill processes

• Adjust process scheduling

• Manage tuning profiles

• Locate and interpret system log files and journals

• Preserve system journals

• Start, stop, and check the status of network services

• Securely transfer files between systems

Configure local storage

• List, create, delete partitions on MBR and GPT disks

• Create and remove physical volumes

• Assign physical volumes to volume groups

• Create and delete logical volumes

• Configure systems to mount file systems at boot by universally unique ID (UUID) or label

• Add new partitions and logical volumes, and swap to a system non-destructively

Create and configure file systems

• Create, mount, unmount, and use vfat, ext4, and xfs file systems

• Mount and unmount network file systems using NFS

• Extend existing logical volumes

• Create and configure set-GID directories for collaboration

• Configure disk compression

• Manage layered storage

• Diagnose and correct file permission problems

Deploy, configure, and maintain systems

• Schedule tasks using at and cron

• Start and stop services and configure services to start automatically at boot

• Configure systems to boot into a specific target automatically

• Configure time service clients

• Install and update software packages from Red Hat Network, a remote repository, or from the local file system

• Work with package module streams

• Modify the system bootloader

Manage basic networking

• Configure IPv4 and IPv6 addresses

• Configure hostname resolution

• Configure network services to start automatically at boot

• Restrict network access using firewall-cmd/firewall

Manage users and groups

• Create, delete, and modify local user accounts

• Change passwords and adjust password aging for local user accounts

• Create, delete, and modify local groups and group memberships

• Configure superuser access

Manage security

• Configure firewall settings using firewall-cmd/firewalld

• Configure key-based authentication for SSH

• Set enforcing and permissive modes for SELinux

• List and identify SELinux file and process context

• Restore default file contexts

• Use boolean settings to modify system SELinux settings

• Diagnose and address routine SELinux policy violations

RHCE 
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