Free RedHat EX200 Practice Exam with Questions & Answers

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.

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.

Solution:

dnf install -y stratisd stratis-cli

systemctl enable --now stratisd

stratis pool create pool1 /dev/sdc

stratis filesystem create pool1 fs1

stratis filesystem list

Detailed Explanation:

stratisd is the daemon and stratis-cli provides the command-line interface.

A Stratis pool is created from a block device.

The Stratis file system is then created inside that pool.

RHEL 10 documents Stratis as an available volume-managing file-system layer. ( Red Hat Documentation )

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 )

Solution:

systemctl set-default multi-user.target

systemctl get-default

Detailed Explanation:

set-default changes the boot target persistently.

get-default verifies the result.

multi-user.target is the standard non-graphical multi-user boot target.

Solution:

mkdir -p /backup

tar -cvf /root/logs.tar /var/log

tar -xvf /root/logs.tar -C /backup

Detailed Explanation:

tar -cvf creates an uncompressed archive.

tar -xvf extracts the archive.

-C /backup tells tar where to extract the files.

This is a common RHCSA-style archive and restore task.

Solution:

Create the swap partition:

fdisk /dev/sdb

partprobe /dev/sdb

Format it for swap:

mkswap /dev/sdb2

Enable it:

swapon /dev/sdb2

Persist it in /etc/fstab:

echo "/dev/sdb2 swap swap defaults 0 0" > > /etc/fstab

Verify:

swapon --show

Detailed Explanation:

mkswap prepares the partition as swap space.

swapon activates it immediately.

Adding an /etc/fstab entry ensures it survives reboot.

The lab uses a partition-based swap workflow.

Solution:

groupadd ops

visudo -f /etc/sudoers.d/ops-restart-httpd

Add this line to the file:

%ops ALL=(ALL) NOPASSWD: /usr/bin/systemctl restart httpd

Set correct permissions:

chmod 440 /etc/sudoers.d/ops-restart-httpd

visudo -cf /etc/sudoers.d/ops-restart-httpd

Detailed Explanation:

Using /etc/sudoers.d/ is the standard safe approach.

visudo validates syntax and helps prevent syntax errors.

%ops applies the rule to the whole group.

Restricting the exact command is better than granting broad sudo access. Red Hat’s RHEL 10 security hardening guide documents sudo configuration through sudoers. ( Red Hat Documentation )

Solution:

firewall-cmd --permanent --add-service=http

firewall-cmd --reload

firewall-cmd --list-services

Detailed Explanation:

--permanent saves the rule.

--reload applies it.

--list-services verifies the active configuration.

Firewalld remains the standard firewall interface in RHEL 10. ( Red Hat Documentation )

Solution:

Create timer unit:

cat > /etc/systemd/system/backup-now.timer < < 'EOF'

[Unit]

Description=Daily backup timer

[Timer]

OnCalendar=*-*-* 02:00:00

Persistent=true

[Install]

WantedBy=timers.target

EOF

Enable it:

systemctl daemon-reload

systemctl enable --now backup-now.timer

systemctl list-timers --all | grep backup-now

Detailed Explanation:

OnCalendar=*-*-* 02:00:00 means daily at 02:00.

Persistent=true runs missed jobs after boot if the system was off.

timers.target is the normal target for timer units.

RHEL 10 documentation includes systemd timer units as a standard scheduling mechanism. ( Red Hat Documentation )