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| Section | Objectives |
|---|---|
| Topic 1: Manage basic networking | - Configure network services to start automatically at boot - Restrict network access using firewalld and firewall-cmd - Configure hostname resolution - Configure IPv4 and IPv6 addresses |
| Topic 2: Understand and use essential tools | - Use input-output redirection - Locate, read, and use system documentation - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - Use grep and regular expressions to analyze text - Create, delete, copy, and move files and directories - Create hard and soft links - Access a shell prompt and issue commands with correct syntax - List, set, and change standard ugo/rwx permissions - Create and edit text files - Log in and switch users in multi-user targets - Access remote systems using SSH |
| Topic 3: Manage security | - Use Boolean settings to modify SELinux settings - Configure key-based authentication for SSH - Manage default file permissions - Restore default file contexts - Set enforcing and permissive modes for SELinux - List and identify SELinux file and process contexts - Manage SELinux port labels - Configure firewall settings using firewall-cmd and firewalld |
| Topic 4: Create and configure file systems | - Mount and unmount network file systems using NFS - Extend existing logical volumes - Create, mount, unmount, and use VFAT, ext4, and XFS file systems - Diagnose and correct file permission problems - Configure autofs |
| Topic 5: Manage users and groups | - Change passwords and adjust password aging for local users - Create, delete, and modify local user accounts - Configure privileged access - Create, delete, and modify local groups and group memberships |
| Topic 6: Configure local storage | - List, create, and delete partitions on GPT disks - Assign physical volumes to volume groups - Create and remove physical volumes - Add new partitions, logical volumes, and swap non-destructively - Configure systems to mount file systems at boot by UUID or label - Create and delete logical volumes |
| Topic 7: Manage software | - Install and remove Flatpak software packages - Install and remove RPM software packages - Configure access to Flatpak repositories - Configure access to RPM repositories |
| Topic 8: Create simple shell scripts | - Conditionally execute code - Use looping constructs to process files and command-line input - Process output of shell commands within a script - Process script inputs |
| Topic 9: Deploy, configure, and maintain systems | - Configure systems to boot into a specific target automatically - Schedule tasks using at, cron, and systemd timer units - Configure time service clients - Modify the system bootloader - Start and stop services and configure services to start automatically at boot - Install and update software packages |
| Topic 10: Operate running systems | - Identify CPU and memory intensive processes and kill processes - Adjust process scheduling - Interrupt the boot process to gain access to a system - Preserve system journals - Boot systems into different targets manually - Locate and interpret system log files and journals - Start, stop, and check the status of network services - Boot, reboot, and shut down a system normally - Securely transfer files between systems - Manage tuning profiles |
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NEW QUESTION # 47
Configure SELinux so that /webdata can be used as web content and make the context persistent.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
mkdir -p /webdata
semanage fcontext -a -t httpd_sys_content_t "/webdata(/.*)?"
restorecon -Rv /webdata
ls -Zd /webdata
Detailed Explanation:
* semanage fcontext defines a persistent SELinux file-context rule.
* restorecon applies the correct labels to the directory and contents.
* httpd_sys_content_t is the standard read-only content type for Apache.
* RHEL 10 SELinux documentation covers persistent labeling with semanage and applying labels with
restorecon. ( Red Hat Documentation )
NEW QUESTION # 48
Configure NTP
Configure your system to synchronize with the NTP server of materials.example.com (Note: materials.example.com is an alias for classroom.example.com).
Answer:
Explanation:
Solution:
# Install the chrony service for configuring NTP server
[root@node1 ~]# yum -y install chrony
[root@node1 ~]# vim /etc/chrony.conf
server materials.example.com iburst
[root@node1 ~]# systemctl restart chronyd
[root@node1 ~]# systemctl enable chronyd
# Check
# Set an arbitrary time
[root@node1 ~]# date -s "1982-1-1"
Fri Jan 1 12:00:00 AM EST 1982
# Restart the NTP server
[root@node1 ~]# systemctl restart chronyd
# Check if the time is synchronized
# Execute after 3-5 seconds, too fast won't synchronize the time
[root@node1 ~]# date
Tue Dec 12 11:40:19 PM EST 2023
# Use the chronyc command to check synchronization status
[root@node1 ~]# chronyc sources -v
.-- Source mode '
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