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NEW QUESTION # 106
An administrator must secure an account for a user who is going on extended leave. Which of the following steps should the administrator take? (Choose two)
Answer: B,C
Explanation:
Securing dormant or temporarily unused user accounts is a best practice emphasized in the Security domain of CompTIA Linux+ V8. When a user goes on extended leave, the goal is to prevent unauthorized access while preserving the user's data and account for future use.
The most effective approach is to disable authentication and interactive login access without deleting the account. Option D, running passwd -l user, locks the user's password by prepending an invalid character to the encrypted password in /etc/shadow. This prevents password-based authentication while retaining the account, files, and ownership information. Linux+ V8 documentation highlights password locking as a standard method for temporarily disabling accounts.
Option F, changing the user's shell to /sbin/nologin, further strengthens account security by preventing interactive shell access entirely. Even if another authentication mechanism were attempted, the user would be denied a login shell. This is a common defense-in-depth measure and is explicitly referenced in Linux+ V8 objectives for access control and account hardening.
The other options are incorrect or inappropriate. Option A (immutable files) does not prevent account access and may interfere with system operations. Option B defeats the purpose of securing an inactive account.
Option C deletes user data, which is unnecessary and risky. Option E has no security effect, as filesystem timestamps do not control access.
Linux+ V8 stresses that secure account management should be reversible, auditable, and minimally disruptive. Locking the password and disabling the login shell meet these criteria and are commonly used together in enterprise environments.
NEW QUESTION # 107
A systems administrator needs to enable routing of IP packets between network interfaces.
Which of the following kernel parameters should the administrator change?
Answer: A
Explanation:
The net.ipv4.ip_forward kernel parameter controls whether the Linux kernel can forward IP packets between network interfaces, enabling routing functionality when set to 1.
NEW QUESTION # 108
To perform a live migration, which of the following must match on both host servers? (Choose two).
Answer: E,F
Explanation:
CPU architecture must match because live migration requires CPU compatibility to continue running the virtual machine without errors.
Disk storage path must match so the migrated VM can access its virtual disks seamlessly on the destination host.
NEW QUESTION # 109
A Linux administrator updates the DNS record for the company using:
cat /etc/bind/db.abc.com
The revised partial zone file is as follows:
ns1 IN A 192.168.40.251
ns2 IN A 192.168.40.252
www IN A 192.168.30.30
When the administrator attempts to resolve www.abc.com to its IP address, the domain name still points to its old IP mapping:
nslookup www.abc.com
Server: 192.168.40.251
Address: 192.168.40.251#53
Non-authoritative answer:
Name: www.abc.com
Address: 199.168.20.81
Which of the following should the administrator execute to retrieve the updated IP mapping?
Answer: C
Explanation:
This scenario represents a classic DNS troubleshooting situation covered in the Troubleshooting domain of the CompTIA Linux+ V8 objectives. Although the DNS zone file has been updated correctly on the BIND server, the system continues to resolve the domain name to an outdated IP address. This behavior strongly indicates DNS caching rather than a configuration error in the zone file itself.
Modern Linux systems that use systemd-resolved cache DNS responses locally to improve performance and reduce external queries. Even after a DNS record is updated on the authoritative server, cached results may persist until the cache expires or is manually cleared. The nslookup output showing a non-authoritative answer further confirms that the response is being served from a cache rather than directly from the updated zone data.
The correct solution is to flush the local DNS cache so the system can retrieve the updated record from the DNS server. The command resolvectl flush-caches clears all cached DNS entries maintained by systemd- resolved, forcing fresh queries to authoritative name servers. This aligns directly with Linux+ V8 documentation for resolving name resolution inconsistencies caused by stale cache entries.
The other options are incorrect for the following reasons. systemd-resolve query www.abc.com performs a DNS lookup but does not clear cached entries. systemd-resolve status only displays resolver configuration and statistics. service nslcd reload reloads the Name Service LDAP daemon and is unrelated to DNS resolution or caching.
Linux+ V8 emphasizes identifying whether issues originate from services, configuration, or cached data. In this case, flushing the DNS cache is the correct and least disruptive corrective action.
Therefore, the correct answer is D. resolvectl flush-caches.
NEW QUESTION # 110
Users report that a Linux system is unresponsive and simple commands take too long to complete. The Linux administrator logs in to the system and sees the following:
Which of the following is the system experiencing?
Answer: A
Explanation:
The load averages (8.71, 8.24, 7.71) are well above the number of CPUs (4), showing CPU saturation. Additionally, Output 2 indicates very high CPU usage (65.88% usr, 20.54% sys) with
0% idle, confirming the system is under heavy CPU load, which explains the unresponsiveness.
NEW QUESTION # 111
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