See the solution below in Explanation.
Explanation:
Solution:
Create the script:
mkdir -p /usr/local/bin
cat > /usr/local/bin/backup-now.sh < < 'EOF'
#!/bin/bash
tar -czf /root/etc-$(date +%F).tar.gz /etc
EOF
chmod +x /usr/local/bin/backup-now.sh
Create the unit file:
cat > /etc/systemd/system/backup-now.service < < 'EOF'
[Unit]
Description=Run manual etc backup
[Service]
Type=oneshot
ExecStart=/usr/local/bin/backup-now.sh
[Install]
WantedBy=multi-user.target
EOF
Reload and test:
systemctl daemon-reload
systemctl start backup-now.service
systemctl status backup-now.service
Detailed Explanation:
* Type=oneshot is correct for a task that runs and exits.
* ExecStart points to the script.
* systemctl daemon-reload is required after adding a new unit file.
* RHEL 10 systemd documentation covers manual unit creation and management. ( Red Hat
Documentation )

Solution:
# Preparations (not required for the exam)
# Go back to foundation0, remote into classroom, create the remoteuser1 user and directory.
# This step is necessary to avoid issues with autofs mounting during testing.
[kiosk@foundation0 ~]$ ssh root@classroom 'useradd -u 1010 remoteuser1 && mkdir -p /rhome/remoteuser1 && chown remoteuser1: /rhome/remoteuser1'
# Install nfs-utils and autofs
[root@node1 ~]# yum -y install nfs-utils autofs
[root@node1 ~]# vim /etc/auto.master
/rhome /etc/auto.rhome
[root@node1 ~]# vim /etc/auto.rhome
remoteuser1 -rw materials.example.com:/rhome/remoteuser1
[root@node1 ~]# systemctl enable --now autofs
# Verification
[root@node1 ~]# ll /rhome/
[root@node1 ~]# ssh remoteuser1@localhost
remoteuser1@localhost\'s password: `flectrag`
$ pwd
/rhome/remoteuser1
$ touch my.file
$ mount | grep rhome
...
materials.example.com:/rhome/remoteuser1 on /rhome/remoteuser1 type nfs4
(`rw`,relatime,vers=4.2,rsize=131072,wsize=131072,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.25.250.100,local_lock=none,addr=1
72.25.254.254)

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

Solution:
Method 1:
# Copy the yum configuration file from node1.
[root@node2 ~]# scp root@node1:/etc/yum.repos.d/rhcsa.repo /etc/yum.repos.d/
Method 2:
[root@node2 ~]# vim /etc/yum.repos.d/rhcsa.repo
[Base]
name=Base
baseurl=http://content/rhel9.0/x86_64/dvd/BaseOS
enabled=1
gpgcheck=no
[App]
name=App
baseurl=http://content/rhel9.0/x86_64/dvd/AppStream
enabled=1
gpgcheck=no
# Verification
[root@node2 ~]# yum repoinfo
[root@node2 ~]# yum -y install ftp

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 )