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What Is RHCSA Exam?
To earn the Red Hat Certified System Administrator, candidates will have to pass one exam coded EX200. This test will evaluate a candidate's knowledge and abilities with system administration that is found across many different types of environments and deployment scenarios. The skills tested in this exam will act as the foundation for system administration across all Red Hat products. In particular, EX200 exam revolves around Red Hat Enterprise Linux 8.2 and is 3 hours long, with the registration fee being USD 400. When it comes to the prerequisites of this exam, it is recommended to take both the official RH124 and RH134 courses before attempting the final test. Passing EX200 will bring home the Red Hat Certified System Administrator certificate.
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Difficulty in writing the Red Hat EX200 Exam
The Red Hat Certified Engineer (EX200) exam is available in two formats. The following are some of the difficulties to be prepared for the exam:
- You will also be required to analyze data for best possible solutions.
- To pass this exam, you need to be able to identify and solve difficult problems.
- You will need to understand the concepts, the terminology, and the basic components that are needed for carrying out tasks.
- While working on a particular problem, you might be required to experiment with different alternatives.
- You will also be required to collaborate with other people involved in the process so that you can arrive at a common conclusion.
Who Is Red Hat Certified System Administrator (RHCSA) Certification Designed for?
This certification is aimed at seasoned system administrators who wish to prove their skills, talented Linux system administrators who require a certification by their organization or a mandate, learners who have completed the official Red Hat System Administration I (RH124) and Red Hat System Administration II (RH134) courses, Information Technology specialists who are trying to become a Red Hat Certified Engineer (RHCE), an RHCE who has out-of-date skills or whose certification is going to expire soon and who wants to again qualify as an RHCE, and finally, DevOps specialists who want to show their competency with container technology.
Red Hat is a multinational software company founded in 1993. They provide open-source software products to businesses and also issue IT certifications to help advance careers, one of which is the Red Hat Certified System Administrator certificate that can be earned by passing EX200 test.
Reference: https://www.redhat.com/en/services/training/ex200-red-hat-certified-system-administrator-rhcsa-exam
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RedHat EX200日本語 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Create and configure file systems | - Autofs - File permission troubleshooting - Extending logical volumes - VFAT, ext4, and XFS file systems - NFS file systems |
| Topic 2: Deploy, configure, and maintain systems | - Software installation and updates - Time service clients - Default boot target configuration - Service management - Bootloader configuration - Task scheduling with at, cron, and systemd timers |
| Topic 3: Operate running systems | - Tuning profiles - Process monitoring and termination - Secure file transfer - Network services - Boot, reboot, and shut down systems - Boot systems into different targets - Process scheduling - System logs and journals - Interrupt the boot process |
| Topic 4: Configure local storage | - Volume groups - Logical volumes - Adding partitions, logical volumes, and swap - Physical volumes - File system mounting using UUID or labels - GPT disk partitions |
| Topic 5: Create simple shell scripts | - Processing script inputs - Conditional execution - Looping constructs - Processing command output |
| Topic 6: Manage basic networking | - IPv4 and IPv6 configuration - Firewall configuration with firewalld and firewall-cmd - Hostname resolution - Network services at boot |
| Topic 7: Manage software | - Install and remove RPM packages - Install and remove Flatpak packages - Configure RPM repositories - Configure Flatpak repositories |
| Topic 8: Manage security | - Default file permissions - SSH key-based authentication - SELinux port labels - SELinux file and process contexts - SELinux file context restoration - Firewall configuration - SELinux Boolean settings - SELinux enforcing and permissive modes |
| Topic 9: Manage users and groups | - Local user account management - Password and password aging management - Local group management - Privileged access configuration |
| Topic 10: Understand and use essential tools | - Input and output redirection - Creating and editing text files - Remote system access using SSH - System documentation - Text analysis with grep and regular expressions - Hard and soft links - Users and multi-user targets - File archiving and compression - File and directory management - Shell access and command syntax - File permissions |
RedHat Red Hat Certified System Administrator - RHCSA (EX200日本語版) Sample Questions:
論理ボリュームサイズの調整
論理ボリューム「vo」とそのファイルシステムのサイズを300MiBに調整します。この際、ファイルシステムの内容は変更しないようにしてください。
注：パーティションサイズは要求されたサイズと完全に一致することはまれですので、290MiBから310MiBの範囲であれば許容範囲となります。
ext4ファイルシステムの場合は、resize2fsを使用するとすぐに反映されます。xfsファイルシステムの場合は、xfs_growfsを使用するとすぐに反映されます。
Correct Answer:
Solution:
# Scan logical volumes
[root@node2 ~]# lvscan
# Extend the logical volume. With -rL, the filesystem space is adjusted immediately after extending the volume.
[root@node2 ~]# lvextend -rL 300M /dev/myvol/vo
# Check the changes
[root@node2 ~]# lsblk
[root@node2 ~]# lvs
# Verification
[root@node2 ~]# df -h
192.168.50.0/24 のクライアントが読み書き可能にマウントできるように、NFS エクスポート /srv/nfs/projects を設定します。
Reveal Solution Discussion 0Correct Answer:
See the solution below in Explanation.
Explanation:
Solution:
dnf install -y nfs-utils
mkdir -p /srv/nfs/projects
echo "/srv/nfs/projects 192.168.50.0/24(rw,sync)" > > /etc/exports
exportfs -rav
systemctl enable --now nfs-server
firewall-cmd --permanent --add-service=nfs
firewall-cmd --reload
exportfs -s
Detailed Explanation:
* nfs-utils provides the NFS server tools.
* /etc/exports defines the exported directory and allowed client network.
* exportfs -rav reloads exports.
* nfs-server must be enabled and started.
* If a firewall is enabled, the NFS service must be allowed.
* RHEL 10 network file services documentation covers NFS server configuration. ( Red Hat
Documentation )
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
/usr/local ディレクトリ内で 3KB より大きく 5KB より小さいファイルを探し、それらを /root/d1 にコピーし、ターゲットディレクトリに SGID を設定します。
Reveal Solution Discussion 0Correct Answer:
See the solution below in Explanation.
Explanation:
Solution:
mkdir -p /root/d1
find /usr/local -type f -size +3k -size -5k -exec cp -rvf {} /root/d1/ \;
chmod g+s /root/d1
ls -ld /root/d1
Detailed Explanation:
* -size +3k means greater than 3 KB.
* -size -5k means less than 5 KB.
* chmod g+s sets the SGID bit on the directory.
* SGID on a directory causes new files created there to inherit the directory's group.
サポートされているファイルシステムに対して、定期的なTRIM操作を有効にします。
Reveal Solution Discussion 0Correct Answer:
See the solution below in Explanation.
Explanation:
Solution:
systemctl enable --now fstrim.timer
systemctl status fstrim.timer
Detailed Explanation:
* fstrim.timer schedules discard of unused blocks.
* This is useful on SSD-backed storage and thin-provisioned environments.
* RHEL 10 storage documentation explicitly documents enabling fstrim.timer. ( Red Hat Documentation )
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