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NEW QUESTION # 21
Which command is used to set the hostname of the local system? (Specify ONLY the command without any path or parameters.)
Answer:
Explanation:
hostname
Explanation:
The hostname command is used to set the hostname of the local system. The hostname command can take a single argument, which is the new hostname to be assigned to the system. For example, to set the hostname to linux, one can run:
hostname linux
The hostname command can also be used without any arguments to display the current hostname of the system. For example, to show the current hostname, one can run:
hostname
The hostname command only changes the hostname temporarily, meaning that the original hostname will be restored after a reboot. To change the hostname permanently, one has to edit the configuration files that store the hostname information, such as /etc/hostname, /etc/hosts, /etc/sysconfig/network, etc. The exact files and commands may vary depending on the Linux distribution and the system initialization process. For more details, please refer to the web search results1 or the question answering results2. References:
NEW QUESTION # 22
What is true about the following command?
nmcli device wifi connect WIFIoI
- A. NetworkManager creates an unconfigured new virtual network interface named WIFIoI.
- B. NetworkManager opens a new public hotspot with the SSID WIFIoI.
- C. NetworkManager creates a new wifi connection WIFIoI and activates it.
- D. NetworkManager returns an error in case the connection WIFIoI does not exist.
- E. NetworkManager returns an error because WIFIoI is an invalid wifi device.
Answer: C
NEW QUESTION # 23
What is true about the file .profile in a user's home directory?
- A. It must use a valid shell script syntax.
- B. It must be executable.
- C. It must be readable for its owner only.
- D. It must call the binary of the login shell.
- E. It must start with a shebang.
Answer: A
NEW QUESTION # 24
To prevent a specific user from scheduling tasks with at, what should the administrator do?
- A. Add the specific user to /etc/at.deny file.
- B. Add the specific user to [deny] section in the /etc/atd.conf file.
- C. Run the following: atd --deny [user].
- D. Add the specific user to /etc/at.allow file.
- E. Add the specific user to nojobs group.
Answer: A
NEW QUESTION # 25
Which of the following commands lists all queued print jobs?
- A. lp
- B. lpr
- C. lpd
- D. lpq
- E. lsq
Answer: D
Explanation:
The lpq command, meaning list print queue, is a command-line utility in the Linux system to display the status of the print queue for a specified printer or class1. The lpq command can take various options and arguments to filter and format the output. By default, the lpq command shows the print queue for the default printer or class, which isdetermined by the PRINTER or LPDEST environment variables, or the /etc/printcap file. For example, to display the print queue for the default printer, one can run:
lpq
The output shows the printer name, status, rank, owner, job number, file size, and file name for each print job.
For example, the output may look like:
Printer: lp@localhost 'HP LaserJet 1020' Queue: no printable jobs in queue Server: no server active Status:
printer idle. enabled since Tue 09 Nov 2021 10:00:00 AM EST Rank Owner Job File(s) Total Size 1st alice
123 report.pdf 1024 bytes 2nd bob 124 memo.docx 2048 bytes 3rd charlie 125 presentation.pptx 4096 bytes This shows that there are three print jobs in the queue for the printer lp@localhost, which is an HP LaserJet
1020. The first job belongs to alice, the second to bob, and the third to charlie. The lpq command can also display the print queue for a specific printer or class by using the -P option, followed by the printer or class name. For example, to display the print queue for the printer lp1, one can run:
lpq -P lp1
The output shows the print queue for the printer lp1, which may be different from the default printer. The lpq command can also display the print queue for all printers or classes by using the -a option. For example, to display the print queue for all printers or classes, one can run:
lpq -a
The output shows the print queue for each printer or class, separated by a blank line. The lpq command is different from the following commands:
* lpd: This is not a command, but a daemon that provides print spooling and network printing services for the Linux system2. The lpd daemon is started by the system initialization scripts and runs in the background. It does not display the print queue for any printer or class.
* lpr: This is a command that submits print jobs to the print queue for a specified printer or class3. The lpr command can take various options and arguments to specify the print options and the files to be printed.
For example, to print the file report.pdf to the default printer, one can run:
lpr report.pdf
The lpr command does not display the print queue for any printer or class.
* lp: This is a command that submits print jobs to the print queue for a specified printer or class, similar to the lpr command4. The lp command can take various options and arguments to specify the print options and the files to be printed. For example, to print the file report.pdf to the printer lp1, one can run:
lp -d lp1 report.pdf
The lp command does not display the print queue for any printer or class.
* lsq: This is not a valid command in the Linux system. It may be a typo or a misspelling of the lpq command. It does not display the print queue for any printer or class. References:
* 1
NEW QUESTION # 26
How does the ping command work by default?
- A. It sends a TCP SYN packet to a remote host and waits to receive an TCP ACK response in return.
- B. It sends an ARP request to a remote host and waits to receive an ARP response in return.
- C. Is sends an ICMP Echo Request to a remote host and waits to receive an ICMP Echo Response in return.
- D. Is sends a broadcast packet to all hosts on the net and waits to receive, among others, a response from the target system.
- E. It sends a UDP packet to port 0 of the remote host and waits to receive a UDP error response in return.
Answer: C
NEW QUESTION # 27
FILL BLANK
Which command must be run after adding a new email alias to the configuration in order to make this change effective? (Specify the command without any path but including all required parameters.)
Answer:
Explanation:
newaliases
NEW QUESTION # 28
How is a display manager started?
- A. It is started by inetd when a remote hosts connects to the X11 port.
- B. It is started automatically when a X11 user logs in to the system console.
- C. It is started like any other system service by the init system.
- D. It is started by a user using the command startx.
Answer: C
Explanation:
A display manager is a program that provides a graphical login screen for users to access a graphical desktop environment. A display manager is usually started by the init system, which is the first process that runs when the system boots up. The init system is responsible for starting and stopping various system services, including the display manager. The init system can be configured to start a specific display manager by setting the default runlevel or target, or by editing the /etc/X11/default-display-manager file123.
The other options are not correct because:
* A. It is started by a user using the command startx. This option is false because the startx command is used to start an X session without a display manager. The startx command launches an X server and runs the user's .xinitrc or .xsession file, which contains the commands to start the desired desktop environment or window manager. The startx command does not invoke a display manager or a graphical login screen .
* C. It is started by inetd when a remote hosts connects to the X11 port. This option is false because inetd is a daemon that listens for incoming network connections and launches the appropriate service for each connection. Inetd does not start a display manager, but it can be used to enable remote access to an X session using the XDMCP protocol. XDMCP stands for X Display Manager Control Protocol, and it allows a remote host to request a graphical login screen from a display manager running on another host.
However, this is not the same as starting a display manager, and it requires the display manager to be already running on the host that provides the XDMCP service .
* D. It is started automatically when a X11 user logs in to the system console. This option is false because a display manager is not started by a user login, but by the init system. A user login can trigger the start of an X session, but not a display manager. A display manager is independent of the user login, and it can run on multiple virtual consoles or display devices. A display manager can also allow multiple users to log in to different X sessions simultaneously123.
References: 1: LPI Linux Certification/Setup A Display Manager - Wikibooks 2: Working with Display Managers - LPIC-1 102 Linux certification - Linux ... 3: How to Change the Default Display Manager in Ubuntu 20.04 : startx - ArchWiki : How to start GUI from command line? - Ask Ubuntu : inetd - Wikipedia :
XDMCP - ArchWiki
NEW QUESTION # 29
How many IP-addresses can be used for unique hosts inside the IPv4 subnet 192.168.2.128/28? (Specify the number only without any additional information.)
Answer:
Explanation:
14
Explanation:
To find the number of IP-addresses that can be used for unique hosts inside an IPv4 subnet, we need to calculate the number of bits that are used for the host part of the IP address. The host part is the part that is not used for the network prefix, which is indicated by the slash notation (/) followed by a number. The number after the slash represents the number of bits that are used for the network prefix, out of the total 32 bits of an IPv4 address. The remaining bits are used for the host part. For example, in the subnet 192.168.2.128/28, the number 28 means that the first 28 bits are used for the network prefix, and the last 4 bits are used for the host part.
The number of IP-addresses that can be used for unique hosts is equal to 2^n - 2, where n is the number of bits in the host part. The -2 is because the first and the last IP addresses in a subnet are reserved for the network address and the broadcast address, respectively, and cannot be assigned to hosts. Therefore, in the subnet 192.168.2.128/28, the number of IP-addresses that can be used for unique hosts is 2^4 - 2, which is 14.
Reference:
IPv4 - Subnetting - Online Tutorials Library
IP Subnet Calculator
NEW QUESTION # 30
In which file, if present, must all users be listed that are allowed to use the cron scheduling system? (Specify the full name of the file, including path.)
Answer:
Explanation:
/etc/cron.allow
NEW QUESTION # 31
On a Linux workstation, the route command takes a long time before printing out the routing table. Which of the following errors does that indicate?
- A. DNS resolution may not be working as route by default tries to resolve names of routers and destinations and may run into a timeout.
- B. The local routing information may be corrupted and must be re-validated using a routing protocol.
- C. One of the routers in the routing table is not available which causes the automatic router failure detection mechanism (ARF-D) to wait for a timeout.
- D. The Linux Kernel Routing Daemon (LKRD) is not running and should be started using its init script or systemd unit.
- E. There may accidentally be more than one default router in which case a default router election has to be done on the network in order to choose one router as the default.
Answer: A
NEW QUESTION # 32
Which parameter must be passed to ifconfig to activate a previously inactive network interface? (Specify the parameter only without any command, path or additional options)
Answer:
Explanation:
up
Explanation:
The parameter that must be passed to ifconfig to activate a previously inactive network interface is up.
The up parameter tells the kernel to activate the network interface and allow it to send and receive packets.
The opposite of up is down, which deactivates the network interface. The up parameter is part of the topic 109.2:
Basic network configuration, which is one of the objectives of the LPI Linux Administrator - 102 exam12.
References: 1: https://learning.lpi.org/en/learning-materials/102-500/ 2:
https://www.lpi.org/our-certifications/exam-102-objectives/
NEW QUESTION # 33
FILL BLANK
Which command is used to sync the hardware clock to the system clock? (Specify only the command without any path or parameters.)
Answer:
Explanation:
hwclock
NEW QUESTION # 34
Which of the following comparison operators for testwork on elements in the file system? (Choose two.)
- A. -
- B. -z
- C. -f
- D. -lt
- E. -eq
Answer: A,C
NEW QUESTION # 35
Which environment variable should be set in order to change the time zone for the commands run from within the environment variable's scope? (Specify the variable name only.)
Answer:
Explanation:
TZ
Explanation:
The TZ environment variable is used to change the time zone for the commands run from within the environment variable's scope. It specifies the name of a time zone as defined in the /usr/share/zoneinfo directory or a custom time zone in the POSIX format12. The TZ variable can be set either globally in a shell profile file or locally in a shell session. For example, to set the time zone to America/New_York for the current shell session, one can use the following command:
export TZ=America/New_York
To verify the change, one can use the date command to display the current date and time according to the TZ variable. The TZ variable can also be used to run a single command with a different time zone without affecting the system's time zone. For example, to run the date command with the Asia/Tokyo time zone, one can use the following syntax:
TZ=Asia/Tokyo date
The TZ variable is useful for testing how applications behave in different time zones or for displaying the time in different locations34. Reference:
How to Set or Change the Time Zone in Linux | Linuxize
Linux / UNIX: TZ Environment Variable - nixCraft
Get Current System Time Zone in Linux | Baeldung on Linux
Setting the TZ Environment Variable on Linux | InterSystems Developer
NEW QUESTION # 36
Which of the following fields are available in both the global /etc/crontab file as well as in user-specific crontab files? (Select TWO correct answers)
- A. Username
- B. Year
- C. Minute
- D. Command
Answer: C,D
NEW QUESTION # 37
What entry can you add to syslog.conf file to have all syslog messages generated by your system go to virtual console 12?
- A. | /dev/tty12
- B. mail.* /dev/tty12
- C. /var/log/messages | /dev/tty12
- D. syslog tty12
- E. *.* /dev/tty12
Answer: E
Explanation:
The syslog.conf file is the main configuration file for the syslogd daemon, which logs system messages on Linux systems. This file specifies rules for logging, using a selector field and an action field. The selector field consists of a facility and a priority, separated by a period. The facility indicates the subsystem that produced the message, such as mail, auth, or kern. The priority indicates the severity of the message, such as debug, info, or emerg. An asterisk (*) stands for all facilities or all priorities, depending on where it is used. The action field specifies where the message should be logged, such as a file, a user, or a device.
To have all syslog messages generated by the system go to virtual console 12, which is represented by the device file /dev/tty12, the following entry can be added to the syslog.conf file:
. /dev/tty12
This means that any facility and any priority (.) should be logged to the device /dev/tty12. This will redirect all the messages that would normally go to /var/log/messages to the console 12. To see the messages, the user can press Ctrl-Alt-F12 to switch to that console.
Reference:
syslog.conf (5) - Linux man page
Beginner's Guide to Syslogs in Linux [Real World Examples]
Configuration Formats - rsyslog 8.33-20180109-54df0f2 documentation
NEW QUESTION # 38
......
Lpi 102-500 exam is the second part of the LPIC-1 certification, which is aimed at entry-level Linux administrators. 102-500 exam focuses on more advanced topics related to Linux system administration, including system security, network configuration, file management, and troubleshooting. The LPIC-1 certification is recognized worldwide as a valuable credential for individuals seeking to demonstrate their skills and knowledge in Linux administration.
The LPIC-1 Exam 102, Part 2 of 2, version 5.0 certification exam is ideal for IT professionals who aspire to become Linux system administrators or improve their skills in Linux administration. 102-500 exam covers a wide range of topics, including file systems and storage, kernel modules, network configuration, system maintenance, and troubleshooting. Candidates who pass the exam demonstrate their ability to manage and maintain Linux systems in a professional environment.
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