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As with any certification, the Red Hat Certified Engineer (EX200) exam is a test of a candidate's abilities. It validates a candidate's ability to design, install, configure, and administer complex enterprise-class systems based on CentOS or RHEL. Choices for system administrators. The Red Hat Certified System Administrator (RHCSA) exam tests candidates on core system administration skills, including installation and configuration of Red Hat Enterprise Linux systems, storage management, networking fundamentals. What you need to know. Cbt is prepared to demonstrate that knowledge of the RHEL 6 platform, the Red Hat Enterprise Linux 6 platform, and core system administration skills. Purchased by enterprises, the Red Hat Certified Engineer (EX200) exam is designed to give Red Hat's customers validation of their skills. Utilize Red Hat resources to prepare for the Red Hat Certified Engineer (EX200) exam.
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Reference: https://www.redhat.com/en/services/training/ex200-red-hat-certified-system-administrator-rhcsa-exam
Red Hat Certified Engineer (EX200) confirms the mindset, skills, and tasks needed to successfully provide consulting and implementation services across a broad range of Red Hat products and technologies for enterprise computing environments. Closest LPI certification. Red Hat Certified Engineer (EX200) confirms the possession of in-depth knowledge of the specific skills required for system administration, network administration, storage administration, and server management on Red Hat Enterprise Linux 6 systems. Processes, tools, and utilities related to enterprise computing. Proven expertise in designing complex enterprise-class Linux systems.
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| Section | Objectives |
|---|---|
| Create and configure file systems | - Extend existing logical volumes - Configure autofs - Mount and unmount network file systems using NFS - Diagnose and correct file permission problems - Create, mount, unmount, and use VFAT, ext4, and XFS file systems |
| Manage basic networking | - Restrict network access using firewalld and firewall-cmd - Configure hostname resolution - Configure network services to start automatically at boot - Configure IPv4 and IPv6 addresses |
| Manage security | - Restore default file contexts - Manage SELinux port labels - Configure key-based authentication for SSH - Set enforcing and permissive modes for SELinux - List and identify SELinux file and process contexts - Configure firewall settings using firewall-cmd and firewalld - Manage default file permissions - Use Boolean settings to modify SELinux settings |
| Manage software | - Install and remove RPM software packages - Configure access to RPM repositories - Install and remove Flatpak software packages - Configure access to Flatpak repositories |
| Manage users and groups | - Configure privileged access - Create, delete, and modify local user accounts - Change passwords and adjust password aging for local users - Create, delete, and modify local groups and group memberships |
| Deploy, configure, and maintain systems | - Modify the system bootloader - Configure systems to boot into a specific target automatically - Configure time service clients - Start and stop services and configure services to start automatically at boot - Schedule tasks using at, cron, and systemd timer units - Install and update software packages |
| Configure local storage | - Assign physical volumes to volume groups - Create and delete logical volumes - Add new partitions, logical volumes, and swap non-destructively - List, create, and delete partitions on GPT disks - Create and remove physical volumes - Configure systems to mount file systems at boot by UUID or label |
| Create simple shell scripts | - Conditionally execute code - Process output of shell commands within a script - Use looping constructs to process files and command-line input - Process script inputs |
| Understand and use essential tools | - Log in and switch users in multi-user targets - Create and edit text files - Create hard and soft links - Locate, read, and use system documentation - Access a shell prompt and issue commands with correct syntax - Use input-output redirection - Access remote systems using SSH - List, set, and change standard ugo/rwx permissions - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - Use grep and regular expressions to analyze text - Create, delete, copy, and move files and directories |
| Operate running systems | - Boot, reboot, and shut down a system normally - Interrupt the boot process to gain access to a system - Boot systems into different targets manually - Identify CPU and memory intensive processes and kill processes - Start, stop, and check the status of network services - Securely transfer files between systems - Adjust process scheduling - Locate and interpret system log files and journals - Preserve system journals - Manage tuning profiles |
AutoFS を設定して、/shares/projects にアクセスすると server1:/srv/nfs/projects がマウントされるようにします。
Reveal Solution Discussion 0Correct Answer:
See the solution below in Explanation.
Explanation:
Solution:
dnf install -y autofs
mkdir -p /shares
echo "/shares /etc/auto.shares" > > /etc/auto.master
echo "projects -fstype=nfs,rw server1:/srv/nfs/projects" > /etc/auto.shares
systemctl enable --now autofs
ls /shares/projects
Detailed Explanation:
* /etc/auto.master defines the main map.
* /etc/auto.shares defines the indirect mount entry.
* The mount happens on demand when /shares/projects is accessed.
* RHEL 10 file-system documentation includes AutoFS for on-demand mounts. ( Red Hat
Documentation )
/share/dev 上でユーザー john の ACL 権限を設定します。
Reveal Solution Discussion 0Correct Answer:
See the solution below in Explanation.
Explanation:
Solution:
* Read-only access:
setfacl -m u:john:r-- /share/dev
* Read-write access:
setfacl -m u:john:rw- /share/dev
* Remove ACL permissions:
setfacl -m u:john:--- /share/dev
Detailed Explanation:
* setfacl -m modifies the ACL.
* u:john:r-- grants read only.
* u:john:rw- grants read and write.
* u:john:--- effectively removes access for that ACL entry.
* ACLs are used when standard owner/group/other permissions are not enough.
システム時刻同期の設定を行い、NTPソースとしてtime.example.comを使用するように設定し、同期が取れていることを確認してください。
Reveal Solution Discussion 0Correct Answer:
See the solution below in Explanation.
Explanation:
Solution:
sed -i '/^pool /d;/^server /d' /etc/chrony.conf
echo "server time.example.com iburst" > > /etc/chrony.conf
systemctl enable --now chronyd
systemctl restart chronyd
chronyc sources -v
chronyc tracking
Detailed Explanation:
* chronyd is the RHEL 10 NTP implementation.
* iburst speeds up initial synchronization.
* chronyc sources -v and chronyc tracking confirm the sync state.
* Red Hat's RHEL 10 time synchronization documentation uses chrony as the supported NTP
implementation. ( Red Hat Documentation )
アーカイブを作成
/usr/local の内容を含む /root/backup.tar.bz2 という名前の tar アーカイブを作成してください。tar アーカイブは bzip2 を使用して圧縮する必要があります。
Correct Answer:
Solution:
[root@node1 ~]# yum -y install bzip2
[root@node1 ~]# tar -jcvPf /root/backup.tar.bz2 /usr/local
# Verification
[root@node1 ~]# file /root/backup.tar.bz
NTPの設定
システムをmaterials.example.comのNTPサーバーと同期するように設定してください(注:materials.example.comはclassroom.example.comの別名です)。
Correct Answer:
Solution:
# Install the chrony service for configuring NTP server
[root@node1 ~]# yum -y install chrony
[root@node1 ~]# vim /etc/chrony.conf
server materials.example.com iburst
[root@node1 ~]# systemctl restart chronyd
[root@node1 ~]# systemctl enable chronyd
# Check
# Set an arbitrary time
[root@node1 ~]# date -s "1982-1-1"
Fri Jan 1 12:00:00 AM EST 1982
# Restart the NTP server
[root@node1 ~]# systemctl restart chronyd
# Check if the time is synchronized
# Execute after 3-5 seconds, too fast won't synchronize the time
[root@node1 ~]# date
Tue Dec 12 11:40:19 PM EST 2023
# Use the chronyc command to check synchronization status
[root@node1 ~]# chronyc sources -v
.-- Source mode '^' = server, '=' = peer, '#' = local clock.
/ .- Source state '*' = current best, '+' = combined, '-' = not combined,
| / 'x' = may be in error, '~' = too variable, '?' = unusable.
|| .- xxxx [ yyyy ] +/- zzzz
|| Reachability register (octal) -. | xxxx = adjusted offset,
|| Log2(Polling interval) --. | | yyyy = measured offset,
|| \ | | zzzz = estimated error.
|| | | \
MS Name/IP address Stratum Poll Reach LastRx Last sample
^* classroom.lab.example.com 8 6 17 42 -14us[ -11us] +/- 463us
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