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| Section | Weight | Objectives |
|---|---|---|
| Troubleshooting | 28% | - Troubleshoot system properties and processes - Troubleshoot network connectivity (firewall, routing, DNS) - Troubleshoot security issues (SELinux, permissions) - Optimize performance (CPU, memory, I/O) - Troubleshoot user issues - Troubleshoot hardware issues - Monitor system logs, health, and events - Troubleshoot application issues |
| Scripting, Containers, and Automation | 19% | - Manage orchestration processes - Implement automation workflows - Automate administration with Python and configuration management tools - Write and execute BASH shell scripts - Deploy and manage containers (Docker/Podman) - Manage version control using Git |
| System Management | 32% | - Manage system components - Manage users and groups - Manage packages and software - Manage networking - Manage kernel modules - Manage storage - Manage files and directories - Perform basic Linux tasks - Manage the Linux boot process - Manage permissions and ownership - Manage devices - Configure storage and cloud/virtualization technologies - Configure kernel modules and network parameters |
| Security | 21% | - Configure SELinux and security contexts - Manage firewalls - Apply best practices for permissions and authentication - Perform vulnerability assessments - Implement security hardening - Manage file security and access controls |
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NEW QUESTION # 134
Which of the following technologies is used to authenticate users on a Linux server when working in a Windows domain?
Answer: D
Explanation:
Kerberos provides centralized, ticket-based authentication and is the core authentication mechanism used by Windows Active Directory, allowing Linux systems joined to a Windows domain to authenticate users securely.
NEW QUESTION # 135
The security manager at a company notifies a systems administrator of open vulnerabilities on the Linux system. The administrator receives the following information while logged in to the server:
Which of the following is the most likely security concern?
Answer: B
Explanation:
The package management history shows that the last system update occurred over a year ago, which strongly indicates that security patches and vulnerability fixes have not been applied, leaving the system exposed to known vulnerabilities.
NEW QUESTION # 136
A systems administrator is creating a backup copy of the /home/directory.
Which of the following commands allows the administrator to archive and compress the directory at the same time?
Answer: C
NEW QUESTION # 137
A systems administrator is configuring new Linux systems and needs to enable passwordless authentication between two of the servers. Which of the following commands should the administrator use?
Answer: B
Explanation:
ssh-keygen -t rsa generates an RSA key pair.
ssh-copy-id -i ~/.ssh/id_rsa.pub john@server2 copies the public key to the remote server's authorized_keys, enabling passwordless login.
NEW QUESTION # 138
A junior system administrator removed an LVM volume by mistake.
INSTRUCTIONS
Part 1
Review the output and select the appropriate command to begin the recovery process.
Part 2
Review the output and select the appropriate command to continue the recovery process.
Part 3
Review the output and select the appropriate command to complete the recovery process and access the underlying data.
Answer:
Explanation:
Explanation:
Part 1 - Begin the recovery process
vgcfgrestore vg01 -f /etc/lvm/archive/vg01_00001-810050352.vg
Part 2 - Continue the recovery process
lvchange -ay /dev/vg01/lv01
Part 3 - Complete recovery and access data
mount /dev/vg01/lv01 /important_data
This performance-based question tests LVM recovery, a critical System Management skill in CompTIA Linux+ V8. The scenario indicates that a logical volume was removed, but the underlying physical volume and volume group metadata still exist.
# Part 1: Restoring Volume Group Metadata
The first screenshot shows that:
Physical volumes (pvdisplay, pvs) still exist
The logical volume is missing
/etc/lvm/archive/ contains archived VG metadata
Linux automatically stores backups of LVM metadata in /etc/lvm/archive whenever changes are made. The correct first step is to restore the volume group metadata using:
vgcfgrestore vg01 -f /etc/lvm/archive/vg01_00001-810050352.vg
This restores the logical volume definitions but does not activate them yet.
This is the only correct starting point in Linux+ V8 recovery workflows.
# Part 2: Activating the Logical Volume
After metadata restoration:
The LV exists but is inactive
blkid shows the LV as TYPE= " LVM2_member "
The logical volume must be activated before it can be mounted:
lvchange -ay /dev/vg01/lv01
This makes the LV available under /dev/vg01/lv01.
Linux+ explicitly requires LV activation after recovery.
# Part 3: Accessing the Data
The final output shows:
The filesystem type is xfs
The logical volume is now visible
Since there is no indication of filesystem corruption, no repair is required.
The correct final step is to mount the filesystem:
mount /dev/vg01/lv01 /important_data
This restores full access to the underlying data.
NEW QUESTION # 139
......
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