102-500 Exam Dumps - LPIC-1 Exam 102, Part 2 of 2, version 5.0

The entry that can be added to the syslog.conf file to have all syslog messages generated by a system displayed on console 12 is A. . /dev/tty12. This entry consists of a selector field and an action field, separated by a space or a tab. The selector field specifies the pattern of facilities and priorities that match the action. The action field specifies the destination where the matching messages are sent. In this case, the selector field is ., which means all facilities and all priorities. The action field is /dev/tty12, which is the device file for the console 12. This means that any syslog message generated by the system will be displayed on the console 12, regardless of its facility or priority. This can be useful for debugging or monitoring purposes, but it can also be very noisy and distracting, as it will show all kinds of messages, including debug, info, notice, warning, err, crit, alert, and emerg12.

The other options are not correct. Option B. /var/log/messages | /dev/tty12 is invalid, as it uses a pipe (|) character in the selector field, which is not allowed. The pipe character can only be used in the action field to indicate that the matching messages are piped to an external program1. Option C. | /dev/tty12 is also invalid, as it has an empty selector field, which is not allowed. The selector field must specify at least one facility and one priority1. Option D. syslog tty12 is also invalid, as it has a missing period (.) between the facility and the priority in the selector field, and a missing slash (/) before the device file in the action field. The correct syntax for this option would be syslog.* /dev/tty12, which would display only the messages with the syslog facility and any priority on the console 121. Option E. mail.* /dev/tty12 is valid, but it would not display all syslog messages generated by a system, but only the messages with the mail facility and any priority on the console 12. This would exclude the messages from other facilities, such as auth, cron, daemon, kern, user, etc1. References: 1: syslog.conf (5) - Linux man page 2: Beginner’s Guide to Syslogs in Linux [Real World Examples]

The ~/.forward file is a file that users can create in their home directories to redirect mail or send mail using sendmail or a similar MTA system. The file contains a list of recipient addresses, which can be email addresses, file names, program names, or :include: files. The file must be owned by the user and have the read permission bit set for the owner. The file cannot be a symbolic link or have more than one hard link. The file is processed by sendmail when a recipient address selects a delivery agent with the F=w flag set. If the file contains a backslash, further processing is disabled and the message is delivered to the user’s mail-spooling directory. If the file does not exist or cannot be read, it is silently ignored. The ~/.forward file is different from the /etc/aliases file, which is a system-wide file that maps aliases to one or more recipient addresses. The /etc/aliases file is maintained by the system administrator and requires running the newaliases command after any changes. The ~/.alias file is not a valid file for sendmail or similar MTA systems. The /etc/mail/forwarders file is not a standard file for sendmail or similar MTA systems. The ~/.vacation file is a file that contains a vacation message that is sent to the sender when the user is away. The ~/.vacation file is used in conjunction with the vacation program, which can be invoked from the ~/.forward file. References:

The journalctl command is a tool for viewing and filtering the systemd journal logs. It accepts various parameters to control the output format, the source of the logs, and the filtering criteria. Two of the parameters that are used to limit the time frame of the output are --since= and --until=. These parameters take a date and time value in the format of “YYYY-MM-DD hh:mm:ss” or a relative value such as “-1h” for one hour ago. For example, the command journalctl --since="2023-11-22 23:00:00" --until="2023-11-23 00:00:00" will show the logs from 11:00 PM to 12:00 AM on November 22, 2023. The --since= and --until= parameters are part of the LPI’s multi-level Linux professional certification program, and they are covered in the topic 106.1 System logging of the exam 102 objectives1. References: 1: https://www.lpi.org/our-certifications/exam-102-objectives/

The file ~/.forward is a text file that contains one or more email addresses to which the incoming mail for the user will be forwarded123. The file is owned by the user and can be edited with any text editor123. The file does not require any special syntax or commands, just a list of email addresses separated by commas or newlines123. For example, if the user wants to forward their mail to alice@example.com and bob@example.com, they can create a ~/.forward file with the following content:

alice@example.com, bob@example.com

The MTA will read the ~/.forward file and send a copy of each incoming mail to the specified addresses123. Therefore, the correct answer is D. When configured correctly, ~/.forward can be used to forward each incoming mail to more than one other recipient.

The other options are false regarding the file ~/.forward. The file is not owned by the MTA and does not need to be edited with the editaliases command, which is used to edit the system-wide aliases file, not the user-specific ~/.forward file4. The user does not need to run newaliases to make the MTA aware of the changes, as the MTA will check the ~/.forward file every time a mail is delivered to the user123. The newaliases command is used to rebuild the system-wide aliases database, not the user-specific ~/.forward file4. The file ~/.forward does not have any restrictions on the email addresses that can be used for forwarding, as long as they are valid and reachable123. The root user can also use the ~/.forward file to forward their mail, but it is not recommended for security reasons.

References: 1: LPIC 102 – Configure e-mail aliases and forwarding on Linux using MTA - TechViewLeo 2: topic 108.3: Mail transfer agent (MTA) basics - IBM Developer 3: 108.3 Mail Transfer Agent (MTA) basics - Linux Professional Institute … 4: Linux At, Batch, Atq, Atrm Command Help and Examples - Computer Hope : [How to forward root’s email to another email address - nixCraft]

The date command is used to display and set the system date and time. It can also be used to print the time in different formats and calculate future and past dates. The date command has the following syntax:

date [option]... [+format]

The format controls begin with the % symbol and are substituted by their current values. For example, to display the current year, month, and day, we can use the following command:

date +"Year: %Y, Month: %m, Day: %d"

To set the system clock manually, we can use the --set or -s option followed by the date and time string. For example, to set the date and time to 5:30 PM, May 13, 2010, we can use the following command:

date --set="20100513 05:30"

The other tasks are not possible with the date command because:

Synchronize the hardware and system clocks: The date command cannot synchronize the hardware and system clocks. To do this, we need to use the hwclock command, which can read or set the hardware clock, and also synchronize it with the system clock.

Set the hardware clock: The date command cannot set the hardware clock. To do this, we need to use the hwclock command with the --systohc or -w option, which will copy the system time to the hardware clock.

Update the time via NTP: The date command cannot update the time via NTP (Network Time Protocol). To do this, we need to use the ntpdate command, which will query an NTP server and set the system clock accordingly.

References:

Date Command in Linux: How to Set, Change, Format and Display Date

date command in Linux with examples - GeeksforGeeks

Date Command in Linux | Linuxize