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Excelling in the above-mentioned exams leads to obtaining the LPIC-1 certificate. It verifies that students are able to perform a variety of system maintenance and administrative tasks, handle files, and more. Earning this certification will also prove that students have a comprehensive understanding of Linux architecture as well as skills in working at the command line and are ready for real-world challenges.

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Lpi LPIC-1 Exam 102, Part 2 of 2, version 5.0 Sample Questions (Q229-Q234):

NEW QUESTION # 229
Of the ways listed, which is the best way to temporarily suspend a single user's ability to interactively login?

A. Change the user name in /etc/passwd.
B. Change the user's password.
C. Use change to expire the user account.
D. Place the command logout in the user's profile.
E. Add the user name to /etc/nologin.

Answer: C

Explanation:
The best way to temporarily suspend a single user's ability to interactively login is to use the chage command to expire the user account. The chage command can modify the expiration date of a user account, which is stored in the /etc/shadow file. By setting the expiration date to a past date, the user account will be locked and the user will not be able to login. This method is temporary because the expiration date can be changed again to a future date or removed to unlock the user account. For example, to expire the user account linuxconfig, we can use the following command:
# chage -E 0 linuxconfig
This will set the expiration date to January 1, 1970, which is the epoch date. To check the expiration date of a user account, we can use the -l option:
# chage -l linuxconfig
Last password change : Aug 24, 2021
Password expires : never
Password inactive : never
Account expires : Jan 01, 1970
Minimum number of days between password change : 0
Maximum number of days between password change : 99999
Number of days of warning before password expires : 7
To remove the expiration date of a user account, we can use the -E option with an empty argument:
# chage -E "" linuxconfig
The other options are either invalid or not recommended. Adding the user name to /etc/nologin will not work, because /etc/nologin is a file that contains a message to be displayed to users who try to login when the system is down for maintenance. Changing the user's password is not a good idea, because it will affect the user's authentication and may cause security issues. Changing the user name in /etc/passwd will also affect the user's authentication and may cause inconsistencies with other files and services. Placing the command logout in the user's profile will not prevent the user from logging in, but only log them out immediately after login, which is not very elegant or secure. References: 1: How to disable user login with Linux nologin - LinuxConfig.org 2:
Disable a user's login without disabling the account - Unix & Linux Stack Exchange 3: How to Block or Disable Normal User Logins in Linux? - GeeksforGeeks 4: How to Disable User Logins on Linux | Baeldung on Linux 5: How to Disable a User in Linux - Linux Nightly 6: How to deactivate or disable a user account in Ubuntu 20.04 LTS - Vitux 7: chage(1) - Linux manual page

NEW QUESTION # 230
FILL BLANK
The presence of what file will temporarily prevent all users except root from logging into a system? (Specify the full name of the file, including path.)

Answer:

Explanation:
/sbin/nologin

NEW QUESTION # 231
Which crontab entry could be used to set the system time at regular intervals?

A. 1 0 * * * date $d $t $24
B. 1 0 * * * date ntp1.digex.net
C. 1 0 * * * ntpdate ntp1.digex.net
D. 1 0 * * * runcron date ntp1.digex.net
E. 1 0 * * * settime $d $t $24

Answer: C

Explanation:
The crontab entry that could be used to set the system time at regular intervals is the one that uses the ntpdate command to synchronize the system clock with a Network Time Protocol (NTP) server. The ntpdate command takes one or more NTP server names or IP addresses as arguments and adjusts the system clock accordingly12. The crontab entry B specifies that the ntpdate command should be executed at the first minute of the zeroth hour (i.e., 00:01) of every day of every month of every weekday, using the NTP server ntp1.digex.net34. This will ensure that the system time is updated daily with a reliable source.
The other crontab entries are either invalid or ineffective for setting the system time at regular intervals. The date command can be used to display or set the system date and time, but it requires a specific format for the argument, not an NTP server name5. The runcron and settime commands are not standard Linux commands and their functionality is unknown. The $d, $t, and $24 variables are also undefined and meaningless in this context.

NEW QUESTION # 232
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

NEW QUESTION # 233
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 # 234
......

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Lpi LPIC-1 Exam 102, Part 2 of 2, version 5.0 Sample Questions (Q229-Q234):

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