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NPower Linux+ Exam 2.0: Questions & Accurate Answers (Rated A+)
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NPower Linux+ Exam 2.0: Questions & AccurateAnswers (Rated A+)
A Linux administrator needs to give the correct permission on a file called
exam.txt. The owner needs to have full permissions to the file, the group only
needs read and execute permissions, and others will not have any
permissions. Which of the following commands should the administrator use
to accomplish this task?
A. chmod 644 exam.txt
B. chmod 650 exam.txt
C. chmod 750 exam.txt
D. chmod 760 exam.txt Right Ans - C. chmod 750 exam.txt
The users of a Linux system are unable to use one of the application
filesystems.
The following outputs have been provided:
Output 1:
$ cd /app
$ touch file
Touch: cannot touch 'file': Read-only file system
Output 2:
/dev/sdcl on /app type ext4 (ro,relatime,seclabel,data=ordered)
Output 3:
/dev/sdc1 /app ext4 defaults 0 0
Output 4:
[ 302.048075 ] Buffer I/O error on dev sdc1, logical block 0, asyng page read
[ 302.048490 ] EXT4-fs (sdc1) : Attempt to read block from filesystem
resulted in short read while trying
Re-open /dev/sdc1
Which of the following actions will resolve this issue?
A. umount /app
fsck -y /dev/sdc1
mount /app
,B. xfs_repair /dev/sdc1
mount -o rw
remount /app
C. umount /app
xfs_repair /dev/sdc1
mount /app
D. fsck -v /dev/sdc1 Right Ans - A. umount /app
fsck -y /dev/sdc1
mount /app
After several services crash, an administrator needs to find an explanation for
why the services crashed. Which of the following commands will display all of
the systemd service logs?
A. lastlog
B. dmesg
C. journalctl
D. cat /var/log/* Right Ans - C. journalctl
A Linux administrator is troubleshooting poor CPU performance on a virtual
machine. The administrator thinks that the underlying hypervisor may be
starved for resources. The administrator uses the top command to check the
current CPU usage. Which of the following CPU metrics supports the
administrator's theory?
A. user
B. nice
C. steal
D. system Right Ans - C. steal
An administrator attempts to connect to a remote server by running the
following command:
$ nmap 192.168.10.36
Starting Nmap 7.60 ( https://nmap.org ) at 2022-03-29 20:20 UTC
Nmap scan report for www1 (192.168.10.36)
Host is up (0.000091s latency).
, Not shown: 979 closed ports
PORT STATE SERVICE
21/tcp open ftp
22/tcp filtered ssh
631/tcp open ipp
Nmap done: 1 IP address (1 host up) scanned in 0.06 seconds
Which of the following can be said about the remote server?
A. A firewall is blocking access to the SSH server.
B. The SSH server is not running on the remote server.
C. The remote SSH server is using SSH protocol version 1.
D. The SSH host key on the remote server has expired. Right Ans - A. A
firewall is blocking access to the SSH server.
An administrator wants to create a shortcut to /shared/dev/projects. Which
of the following commands can the administrator use to create a link to the
/projects directory from the administrator's home directory?
A. ln ~/projects /shared/dev/projects
B. ln -s /home/admin/projects /shared/dev/projects
C. ln /home /admin/projects ~/projects
D. ln - s /shared/dev/projects /home/admin/projects Right Ans - D. ln -
s /shared/dev/projects /home/admin/projects
A Linux administrator needs to harden a system and guarantee that the
Postfix service will not run even after a restart or system upgrade. Which of
the following commands allows the administrator to fulfill the requirement?
A. systemctl mask postfix.service
B. systemctl disable postfix.service
C. systemctl stop postfix.service
D. systemctl -n restart postfix.service Right Ans - A. systemctl mask
postfix.service
A Linux administrator needs to check the content of a log file that is
appending data as the file grows. Which of the following commands should the
administrator use to accomplish this task?
A. tail -f log.txt
B. tail -v log.txt
C. tail -c log.txt
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