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| Section | Objectives |
|---|---|
| Topic 1: Create simple shell scripts | - Loops and iteration - Input and argument processing - Command output processing - Conditional statements |
| Topic 2: Operate running systems | - Secure file transfer - Log files and journal management - Boot into different targets - Process management and monitoring - Service control and status checking - Boot, reboot and shut down systems |
| Topic 3: Deploy, configure and maintain systems | - Bootloader modification - Time synchronization - Task scheduling with at and cron - Service management and automatic startup - Software installation and update - System target configuration |
| Topic 4: Manage users and groups | - Password and aging policy - Superuser access control - Group and membership management - User account management |
| Topic 5: Understand and use essential tools | - Access system documentation - File and directory management - Text processing with grep and regular expressions - Remote access via SSH - File archiving, compression and decompression - Input/output redirection - Links and permissions - Access shell prompt and use commands |
| Topic 6: Create and configure file systems | - Autofs configuration - Logical volume extension - Permission and ownership troubleshooting - Create and mount ext4, xfs, VFAT file systems - Network file systems (NFS) |
| Topic 7: Configure local storage | - Swap configuration - Physical volumes, volume groups and logical volumes - Disk partitioning (MBR and GPT) - Mount file systems at boot via UUID or label |
| Topic 8: Manage security | - SELinux modes and configuration - Default permissions and umask - SELinux booleans and policy - Firewall configuration with firewalld - SSH key-based authentication - SELinux context management |
| Topic 9: Manage basic networking | - Network service startup configuration - Hostname resolution - IPv4 and IPv6 address configuration |
| Topic 10: Manage software | - Flatpak repository configuration - Install and remove Flatpak applications - RPM repository configuration - Install and remove RPM packages |
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NEW QUESTION # 56
Create a compressed archive of /etc and verify its file type.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
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.
NEW QUESTION # 57
Part 1 (on Node1 Server)
Task 5 [Controlling Access to Files with ACLs]
Copy the file /etc/fstab to /var/tmp. Configure the following permissions on /var/tmp/fstab.
The file /var/tmp/fstab is owned by root user
The file /var/tmp/fstab is belongs to the root group
The file /var/tmp/fstab should be executable by anyone
The user harry is able to read and write on /var/tmp/fstab
The user natasha can neither read or write on /var/tmp/fstab
All other users (Current or future) have the ability to read /var/tmp/fstab
Answer:
Explanation:
* [root@node1 ~]# cp -p /etc/fstab /var/tmp/
[root@node1 ~]# ls -lrt /etc/fstab
[root@node1 ~]# ls -lrt /var/tmp/fstab
[root@node1 ~]# chmod a+x /var/tmp/fstab
[root@node1 ~]# getfacl /var/tmp/fstab
[root@node1 ~]# setfacl -m u:harry:rw- /var/tmp/fstab
[root@node1 ~]# setfacl -m u:natasha:--- /var/tmp/fstab
[root@node1 ~]# getfacl /var/tmp/fstab
getfacl: Removing leading '/' from absolute path names
# file: var/tmp/fstab
# owner: root
# group: root
user::rwx
user:harry:rw-
user:natasha:---
group::r-x
mask::rwx
other::r-x
* [root@node1 ~]# su - natasha
[natasha@node1 ~]$ cat /var/tmp/fstab
cat: /var/tmp/fstab: Permission denied
NEW QUESTION # 58
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 # 59
Create a Shared Directory.
Create a shared directory /home/admins, make it has the following characteristics:
/home/admins belongs to group adminuser
This directory can be read and written by members of group adminuser Any files created in /home/ admin, group automatically set as adminuser.
Answer:
Explanation:
see explanation below.
Explanation
mkdir /home/admins
chgrp -R adminuser /home/admins
chmodg+w /home/admins
chmodg+s /home/admins
NEW QUESTION # 60
Which of the following statements is true about load balancers?
Answer: C
NEW QUESTION # 61
......
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