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NEW QUESTION # 73
User1 reports "access denied" errors while trying to execute app. Given the following outputs:
Which of the following options will remediate this issue?
Answer: A
Explanation:
According to the output of getfacl app, user1 has only "rw" (read and write) permissions, but lacks
"x" (execute). Without execute permission, user1 cannot run the file. To allow user1 to execute app, you must update the ACL to add execute permission (e.g., setfacl -m u:user1:rwx app).
Modifying "others" permissions (option B) is not secure or necessary, adding user1 to the wheel group (option C) is unrelated, and moving the file (option D) does not resolve permission issues.
NEW QUESTION # 74
An administrator receives a report that a user is unable to execute the runreports utility. The administrator logs in as the user, runs the following commands, and receives the following output:
$ runreports
runreports: command not found
$ ls -l /usr/local/bin
-rwxr-xr-x 1 root root 29 May 10 11:31 runreports
$ echo $PATH
/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
Which of the following best describes the issue and how to resolve it?
Answer: D
Explanation:
In Linux, for a command to be executed by its name alone (without an absolute or relative path), the directory containing the executable must be listed in the user ' s PATH environment variable. According to the CompTIA Linux+ V8 objectives, troubleshooting " command not found " errors requires an investigation of the binary ' s location versus the current PATH configuration.
In this scenario, the utility runreports is located in /usr/local/bin. However, the output of echo $PATH reveals that /usr/local/bin is not present in the search directories. The current PATH includes /usr/sbin, /usr/bin, /sbin,
/bin, and others, but specifically excludes the location of the utility. Because the shell cannot find the file in any of its defined search paths, it returns " command not found. " To resolve this issue permanently for the user, the administrator should add /usr/local/bin to the user ' s PATH by modifying a shell initialization file, such as ~/.bash_profile or ~/.bashrc. Adding the line export PATH=$PATH:/usr/local/bin ensures the directory is included in future sessions.
The other options are incorrect based on the provided evidence. Option B is wrong because the ls -l output shows the file has r-x permissions for " others, " meaning the user can already execute it despite not being the owner. Option C is unlikely because SELinux typically results in " Permission Denied, " not " Command Not Found. " Option D is also incorrect as the ls -l output clearly shows the execute (x) bit is already set for all users (755).
Therefore, the missing PATH entry is the verified root cause.
NEW QUESTION # 75
To perform a live migration, which of the following must match on both host servers? (Choose two)
Answer: D,E
Explanation:
Comprehensive and Detailed 250 to 350 words of Explanation From Linux+ V8 documents:
Live migration is a virtualization feature that allows a running virtual machine to be moved from one host to another with minimal or no downtime. This topic falls under System Management in the CompTIA Linux+ V8 objectives, particularly in the areas of virtualization and resource management.
For a live migration to succeed, the CPU architecture must match between the source and destination hosts.
This is critical because the running virtual machine's CPU state, instruction set, and registers must be compatible with the destination system. Migrating between different CPU architectures (for example, x86_64 to ARM) is not supported and would cause the virtual machine to fail. Therefore, option D is required.
Additionally, the destination host must have sufficient available memory to accommodate the virtual machine being migrated. During live migration, the memory contents of the running VM are copied from the source host to the destination host while the VM continues to run. If enough memory is not available, the migration cannot complete successfully. This makes option E mandatory.
The other options are not strict requirements. USB ports do not need to match for live migration. Network speed may affect migration performance but does not need to be identical. Available swap space is not directly required for migration. Disk storage paths do not need to match as long as shared storage or compatible storage access is available.
Linux+ V8 documentation emphasizes CPU compatibility and memory availability as core prerequisites for live migration. Therefore, the correct answers are D and E.
NEW QUESTION # 76
Which of the following describes how a user's public key is used during SSH authentication?
Answer: C
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
During SSH public key authentication, the server checks if the user's public key is present in the ~/.ssh
/authorized_keys file. If the key is found, the server uses it to verify the user's identity by sending a challenge that can only be answered by the corresponding private key. This process does not involve password hashing or using the public key directly for encryption of the communication stream. Instead, the public key is simply used as a reference for authentication.
Reference:
CompTIA Linux+ Study Guide: Exam XK0-006, Sybex, Chapter 11: "Securing Linux", Section: "SSH Key- Based Authentication" CompTIA Linux+ XK0-006 Objectives, Domain 3.0: Security
NEW QUESTION # 77
An average of one out of three users in a company cannot reach the company website. A Linux administrator determines that one of the three website servers is down. The administrator inspects the DNS configuration for the website and notices the following entry:
Which of the following accurately explains the issue?
Answer: A
Explanation:
With multiple A records, DNS performs simple round-robin ordering and returns the records in a different sequence on each query. Most clients try the first address returned-so when the downed server's IP appears first (about one in three times), those users cannot connect.
NEW QUESTION # 78
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