EX200 Sample Questions Answers

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:

stratis filesystem snapshot pool1 fs1 fs1-snap

stratis filesystem list

Detailed Explanation:

This creates a snapshot of the existing Stratis file system.

Snapshots are useful for rollback, backup, and testing operations.

Stratis features, including pool and file-system management, are part of RHEL 10 file-system administration. ( 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:

Create the destination directory if needed:

mkdir -p /root/tomfiles

Find and copy:

find / -type f -user tom -exec cp -pvf {} /root/tomfiles/ \;

Detailed Explanation:

find / searches the whole filesystem.

-type f restricts results to files.

-user tom matches owner tom.

-exec cp -pvf copies each file with verbose and force options.

mkdir -p is added as a safe preparation step.

Solution:

groupadd admin

mkdir -p /common/admin

chgrp admin /common/admin

chmod 2770 /common/admin

Detailed Explanation:

groupadd admin creates the group.

chgrp admin assigns the group ownership.

2770 means:

2 = SGID

7 = owner rwx

7 = group rwx

0 = others no access

This is a standard shared group-admin directory design.

Solution:

tar -zvcf /root/etc_backup.tar.gz /etc

file /root/etc_backup.tar.gz

Detailed Explanation:

tar creates the archive.

-z uses gzip compression.

-v is verbose.

-c creates the archive.

-f names the output file.

file confirms the resulting archive type.

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:

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:

dnf install -y autofs

mkdir -p /automount

echo "/automount /etc/auto.automount --timeout=30" > > /etc/auto.master

echo "public -ro,sync nfs.lab.example.com:/public" > > /etc/auto.automount

echo "private -rw,sync nfs.lab.example.com:/private" > > /etc/auto.automount

systemctl enable --now autofs

Detailed Explanation:

/etc/auto.master defines the main AutoFS map.

/etc/auto.automount defines the indirect map entries.

public will mount read-only.

private will mount read-write.

AutoFS mounts on access rather than permanently at boot.