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| Section | Objectives |
|---|---|
| Topic 1: Manage users and groups | - Privileged access configuration - Local user account management - Local group management - Password and password aging management |
| Topic 2: Manage security | - Firewall configuration - SELinux enforcing and permissive modes - SELinux Boolean settings - SELinux port labels - SSH key-based authentication - SELinux file and process contexts - Default file permissions - SELinux file context restoration |
| Topic 3: Deploy, configure, and maintain systems | - Time service clients - Bootloader configuration - Task scheduling with at, cron, and systemd timers - Default boot target configuration - Software installation and updates - Service management |
| Topic 4: Understand and use essential tools | - System documentation - Shell access and command syntax - Creating and editing text files - File and directory management - File permissions - Input and output redirection - File archiving and compression - Hard and soft links - Users and multi-user targets - Remote system access using SSH - Text analysis with grep and regular expressions |
| Topic 5: Manage software | - Install and remove RPM packages - Configure RPM repositories - Configure Flatpak repositories - Install and remove Flatpak packages |
| Topic 6: Manage basic networking | - Firewall configuration with firewalld and firewall-cmd - Hostname resolution - Network services at boot - IPv4 and IPv6 configuration |
| Topic 7: Configure local storage | - Physical volumes - Logical volumes - File system mounting using UUID or labels - GPT disk partitions - Adding partitions, logical volumes, and swap - Volume groups |
| Topic 8: Create and configure file systems | - Extending logical volumes - Autofs - VFAT, ext4, and XFS file systems - File permission troubleshooting - NFS file systems |
| Topic 9: Create simple shell scripts | - Processing script inputs - Looping constructs - Conditional execution - Processing command output |
| Topic 10: Operate running systems | - Interrupt the boot process - Process monitoring and termination - Boot, reboot, and shut down systems - Process scheduling - System logs and journals - Network services - Secure file transfer - Tuning profiles - Boot systems into different targets |
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NEW QUESTION # 63
Configure a restrictive umask for user natasha so new files become 400 and directories become 500.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
echo "umask 0277" > > /home/natasha/.bash_profile
Detailed Explanation:
* A umask of 0277 removes group and other permissions entirely.
* New files: base 666 minus mask 277 gives 400.
* New directories: base 777 minus mask 277 gives 500.
* Putting it in .bash_profile applies it for that user's login shell.
NEW QUESTION # 64
According the following requirements to create user, user group and the group members:
- A group named admin.
- A user named mary, and belong to admin as the secondary group.
- A user named alice, and belong to admin as the secondary group.
- A user named bobby, bobby's login shell should be non-interactive. Bobby not belong to admin as the secondary group.
Mary, Alice, bobby users must be set "password" as the user's password.
Answer:
Explanation:
groupadd admin
useradd -G admin mary
useradd -G admin alice
useradd -s /sbin/nologin bobby
echo "password" | passwd --stdin mary
echo "password" | passwd --stdin alice
echo "password" | passwd --stdin bobby
NEW QUESTION # 65
Reset the root password from the boot process.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
* Reboot the system.
* Interrupt GRUB boot.
* Press e to edit the boot entry.
* On the linux line, append:
rd.break
* Boot with Ctrl+x.
* At the emergency shell:
mount -o remount,rw /sysroot
chroot /sysroot
passwd root
touch /.autorelabel
exit
exit
Detailed Explanation:
* rd.break drops you into an early emergency environment.
* /sysroot contains the real root filesystem.
* mount -o remount,rw /sysroot makes it writable.
* chroot /sysroot changes into the installed system.
* passwd root resets the password.
* touch /.autorelabel is critical so SELinux relabels files on next boot.
NEW QUESTION # 66
Create a Quadlet-based systemd container unit so a UBI 10 container named sleepy starts automatically at boot.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
Create the Quadlet file:
mkdir -p /etc/containers/systemd
cat > /etc/containers/systemd/sleepy.container < < 'EOF'
[Container]
Image=registry.access.redhat.com/ubi10/ubi
ContainerName=sleepy
Exec=sleep 3600
[Install]
WantedBy=multi-user.target
EOF
Reload and enable:
systemctl daemon-reload
systemctl enable --now sleepy.service
systemctl status sleepy.service
Detailed Explanation:
* Quadlet is the preferred modern way to manage Podman containers with systemd for new configurations.
* The .container file is translated into a systemd-managed service.
* RHEL 10 documentation notes that podman generate systemd still exists, but Quadlets are preferred for new setups. ( Red Hat Documentation )
NEW QUESTION # 67
Configure /var/tmp/fstab Permission.
Copy the file /etc/fstab to /var/tmp/fstab. Configure var/tmp/fstab permissions as the following:
Owner of the file /var/tmp/fstab is Root, belongs to group root
File /var/tmp/fstab cannot be executed by any user
User natasha can read and write /var/tmp/fstab
User harry cannot read and write /var/tmp/fstab
All other users (present and future) can read var/tmp/fstab.
Answer:
Explanation:
cp /etc/fstab /var/tmp/
/var/tmp/fstab view the owner setfacl -m u:natasha:rw- /var/tmp/fstab setfacl -m u:haryy:--- /var/tmp/fstab Use getfacl /var/tmp/fstab to view permissions
NEW QUESTION # 68
......
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