RedHat EX200日本語 Actual Free Exam Questions & Community Discussion

See the solution below in Explanation.
Explanation:
Solution:
* Reboot the server.
* At the GRUB menu, highlight the kernel entry and press e.
* Find the line starting with linux.
* Append:
systemd.unit=emergency.target
* Press Ctrl+x to boot.
Detailed Explanation:
* This changes the boot target only for the current boot.
* Emergency mode is useful for rescue and maintenance tasks.
* Red Hat's RHEL 10 systemd guidance documents booting with systemd.unit= < name > .target from
GRUB. ( Red Hat Documentation )

Solution:
# Note: Perform the following operations by SSHing into localhost as the user "wallah"
[root@node1 ~]# ssh wallah@localhost
# Prepare the relevant mapping directories
[wallah@node1 ~]$ sudo mkdir /opt/{file,progress}
[wallah@node1 ~]$ sudo chown wallah:wallah /opt/{file,progress}
# Start the container and map directories
# :Z changes the SELinux security context of the directory to allow container access.
[wallah@node1 ~]$ podman run -d --name ascii2pdf -v /opt/file:/dir1:Z -v /opt/progress:/dir2:Z pdf
[wallah@node1 ~]$ podman ps -a
# Create systemd service file
[wallah@node1 ~]$ mkdir -p ~/.config/systemd/user
[wallah@node1 ~]$ cd ~/.config/systemd/user/
[wallah@node1 ~]$ podman generate systemd -n ascii2pdf -f --new
[wallah@node1 user]$ ll
total 4
-rw-r--r--. 1 wallah wallah 770 Dec 13 01:07 container-ascii2pdf.service
# Stop and remove the existing ascii2pdf container
[wallah@node1 ~]$ podman stop ascii2pdf
[wallah@node1 ~]$ podman rm ascii2pdf
[wallah@node1 ~]$ podman ps -a
# Enable and start the container-ascii2pdf service
[wallah@node1 ~]$ systemctl --user daemon-reload
[wallah@node1 ~]$ systemctl --user enable --now container-ascii2pdf
# Check container status
[wallah@node1 ~]$ systemctl --user status container-ascii2pdf
[wallah@node1 ~]$ podman ps
# On node1, switch to the root user to perform the following operations
# Ensure that the services for the wallah user start automatically at system boot
[root@node1 ~]# loginctl enable-linger
[root@node1 ~]# loginctl show-user wallah
# Check to ensure the container starts on boot (mandatory operation)
[root@node1 ~]# reboot
[root@node1 ~]# ssh wallah@node1
[wallah@node1 ~]# podman ps

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 )

See the solution below in Explanation.
Explanation:
Solution:
subscription-manager config --rhsm.manage_repos=0
Detailed Explanation:
* This disables repository management by Subscription Manager, exactly as shown in the lab dataset.
* Use this when a task wants system repositories disabled so custom repos can be managed manually.

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 )

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.

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 )