See the solution below in Explanation.
Explanation:
Solution:
echo "john" > > /etc/cron.deny
Detailed Explanation:
* cron.deny blocks listed users from using cron.
* This is the simplest way to deny scheduled-job access for one user.

See the solution below in Explanation.
Explanation:
Solution:
dnf install -y vdo kmod-kvdo lvm2
pvcreate /dev/sdc
vgcreate vdo-volumegroup /dev/sdc
lvcreate --type vdo -n vdo-logicalvolume -L 5G -V 50G vdo-volumegroup/vdo-pool
mkfs.xfs /dev/vdo-volumegroup/vdo-logicalvolume
Detailed Explanation:
* VDO provides compression and deduplication.
* -L 5G sets the physical backing size.
* -V 50G sets the logical exposed size.
* This allows thin, optimized storage presentation.
* The exact commands are taken from the RHCSA dataset embedded in the uploaded lab HTML.

See the solution below in Explanation.
Explanation:
Solution:
podman pull registry.access.redhat.com/ubi10/ubi
podman run -d --name webtest registry.access.redhat.com/ubi10/ubi sleep 3600
podman ps
Detailed Explanation:
* podman pull downloads the image.
* podman run -d starts the container in the background.
* Rootless Podman is a normal RHEL container workflow.
* RHEL 10 container documentation continues to center on Podman for image and container
management. ( Red Hat Documentation )

See the solution below in Explanation.
Explanation:
Solution:
pvcreate /dev/sdb3
vgcreate -s 16M VG1 /dev/sdb3
lvcreate -l 30 -n LV1 VG1
mkfs.ext4 /dev/VG1/LV1
Detailed Explanation:
* vgcreate -s 16M sets PE size to 16 MB.
* lvcreate -l 30 allocates 30 extents.
* 30 x 16 MB = 480 MB total LV size.
* mkfs.ext4 creates the filesystem.

Solution:
# Connect to servera via console for IP modification, then check using the ip addr command.
# After confirming no issues, SSH to servera for hostname modification. This way, you can copy the hostname to avoid typos.
[root@clear ~] nmcli con show
[root@clear ~] nmcli con mod 'network configuration name' ipv4.method manual ipv4.addresses 172.25.0.25/24 ipv4.gateway 172.25.0.254 ipv4.dns 172.25.0.254
autoconnect yes
[root@clear ~] nmcli con up 'network configuration name'
[root@clear ~] ip a
[root@clear ~] ssh [email protected]
[root@clear ~] hostnamectl set-hostname red.lab0.example.com
# Verification
[root@node1 ~] ip a //Check if the IP is correct
[root@node1 ~] hostname //Check if the hostname is correct