Free Practice Questions for RedHat EX200 Exam

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:

Set the hostname:

hostnamectl set-hostname server1.example.com

Configure the existing connection with a static IP:

nmcli connection modify ens160 ipv4.address 192.168.1.2/24 ipv4.gateway 192.168.1.1 ipv4.dns 1.1.1.1 ipv4.method manual connection.autoconnect yes

Bring the connection up:

nmcli connection up ens160

Detailed Explanation:

hostnamectl is the correct modern command for changing the system hostname.

nmcli is the correct tool for RHEL 10 network configuration because the old ifcfg style is removed in RHEL 10, and NetworkManager keyfiles are the supported model.

ipv4.method manual tells NetworkManager to use static addressing.

connection.autoconnect yes ensures the profile activates automatically after reboot.

nmcli connection up ens160 applies the changes immediately.

Solution:

useradd harry

passwd harry

chage -M 30 -d 0 harry

chage -l harry

Detailed Explanation:

useradd harry creates the local user.

passwd harry sets the initial password.

chage -M 30 sets the maximum password age to 30 days.

chage -d 0 forces the user to change the password at next login.

chage -l harry verifies the policy.

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:

mkdir -p /root/d1

find /usr/local -type f -size +3k -size -5k -exec cp -rvf {} /root/d1/ \;

chmod g+s /root/d1

ls -ld /root/d1

Detailed Explanation:

-size +3k means greater than 3 KB.

-size -5k means less than 5 KB.

chmod g+s sets the SGID bit on the directory.

SGID on a directory causes new files created there to inherit the directory’s group.

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:

dnf install -y tuned

systemctl enable --now tuned

tuned-adm recommend

tuned-adm profile virtual-guest

tuned-adm active

Detailed Explanation:

The lab text uses yum, but on RHEL 10 dnf is the preferred package manager command. RHEL 10 documentation focuses on DNF behavior and changes.

tuned-adm recommend shows the best-fit tuning profile.

tuned-adm profile virtual-guest activates the profile.

tuned-adm active confirms it.

Solution:

dd if=/dev/zero of=/swapfile bs=1M count=512

chmod 600 /swapfile

mkswap /swapfile

swapon /swapfile

echo "/swapfile swap swap defaults 0 0" > > /etc/fstab

swapon --show

Detailed Explanation:

dd creates the file.

chmod 600 protects swap contents.

mkswap prepares the file as swap.

swapon activates it now.

/etc/fstab ensures it is enabled at boot.

Solution:

systemctl enable --now fstrim.timer

systemctl status fstrim.timer

Detailed Explanation:

fstrim.timer schedules discard of unused blocks.

This is useful on SSD-backed storage and thin-provisioned environments.

RHEL 10 storage documentation explicitly documents enabling fstrim.timer. ( Red Hat Documentation )