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| Section | Weight | Objectives |
|---|---|---|
| Operate Running Systems | 15-20% | - Identify CPU/memory intensive processes - Adjust process scheduling and priority - Describe the boot process and systemd basics - Boot systems into different targets manually - Interrupt the boot process to gain access to a system - Locate and interpret system log files - Start and stop virtual machines - Boot, reboot, and shut down a system - Access a virtual machine's console |
| Configure Local Storage | 15-20% | - Configure LVM storage with command-line tools - Configure system to mount filesystem at boot - Configure disk quotas - Configure and manage swap space - Create and configure ext4, xfs, and vfat filesystems - List, create, delete partitions on MBR and GPT disks - Mount, unmount, and use NFS, SMB, and autofs |
| Understand and Use Essential Tools | 15-20% | - Use redirection, pipe, and command chaining - Archive, compress, unpack, and uncompress files - Locate, read, and use system documentation - Create and edit text files - Use grep and regular expressions - Access and search the command line |
| Manage Security | 10-15% | - Configure firewall settings using firewalld and iptables - Configure key-based authentication for SSH - Configure SE Linux modes and policies - Set file permissions and ownership |
| Create and Configure File Systems | 10-15% | - Configure systems to mount swap space at boot - Configure systems to mount file systems at boot - Mount, unmount, and use LUKS-encrypted partitions - Create, mount, unmount, and use ext2, ext3, and ext4 filesystems |
| Manage Users and Groups | 10-15% | - Create, delete, and modify local user accounts - Manage sudo access to users and groups - Set password aging and lock policies - Create, delete, and modify local groups |
| Manage Networking | 10-15% | - Edit /etc/hosts - Configure network services to start automatically - Configure IPv4 and IPv6 addresses - Configure hostname resolution |
| Deploy, Configure, and Maintain Systems | 15-20% | - Install and update software from Red Hat Network, satellite, or local repositories - Modify the system bootloader - Schedule tasks using at, cron, and systemd timers - Configure time zones and NTP synchronization |
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NEW QUESTION # 46
In the system, mounted the iso image /root/examine.iso to/mnt/iso directory. And enable automatically mount (permanent mount) after restart system.
Answer:
Explanation:
mkdir -p /mnt/iso
/etc/fstab:
/root/examine.iso /mnt/iso iso9660 loop 0 0 mount -a
mount | grep examine
NEW QUESTION # 47
Create a systemd timer that runs backup-now.service every day at 02:00.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
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 )
NEW QUESTION # 48
Download ftp://192.168.0.254/pub/boot.iso to /root, and mounted automatically under /media/cdrom and which take effect automatically at boot-start.
Answer:
Explanation:
see explanation below.
Explanation
# cd /root; wget ftp://192.168.0.254/pub/boot.iso
# mkdir -p /media/cdrom
# vim /etc/fstab
/root/boot.iso /media/cdrom iso9660 defaults,loop 0 0
# mount -a
mount [-t vfstype] [-o options] device dir
NEW QUESTION # 49
01. Configure Network Settings
Configure node1 with the following network settings:
Hostname: node1.domain250.example.com
IP address: 172.25.250.100
Subnet mask: 255.255.255.0
Gateway: 172.25.250.254
Answer:
Explanation:
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 root@172.25.250.100
[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
NEW QUESTION # 50
SIMULATION
Create a swap space, set the size is 600 MB, and make it be mounted automatically after rebooting the system (permanent mount).
Answer:
Explanation:
See explanation below.
Explanation/Reference:
Explanation:
if=/dev/zero of=/swapfile bs=1M count=600 mkswap /swapfile
/etc/fstab:
/swapfile swap swap defaults 0 0 mount -a
NEW QUESTION # 51
......
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