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Lpi LPIC-1 Exam 102, Part 2 of 2, version 5.0 Sample Questions (Q166-Q171):

NEW QUESTION # 166
Which configuration file would be edited to change the default options for outbound SSH sessions?

Answer: D

Explanation:
The /etc/ssh/ssh_config file is the global configuration file for the OpenSSH client. It contains the default values for the options that apply to all outbound SSH sessions initiated from the system. The options in this file can be overridden by the user's configuration file (~/.ssh/config) or by command-line arguments. The
/etc/ssh/sshd_config file is the configuration file for the OpenSSH server, and it does not affect outbound SSH sessions. The other options are not valid configuration files for OpenSSH. References:
* LPIC-1 Exam 102 Objectives, Topic 110: Security, 110.3 Perform security administration tasks, Key Knowledge Areas: Basic client-side DNS configuration, Configure SSH and remote X
* [OpenSSH manual page], FILES section, /etc/ssh/ssh_config description


NEW QUESTION # 167
Which directory holds the files that configure the xinetd service when using several configuration files instead of an integrated configuration file? (Specify the full path to the directory.)

Answer:

Explanation:
etcxinetddetcxinetdd
Explanation:
The /etc/xinetd.d/ directory holds the files that configure the xinetd service when using several configuration files instead of an integrated configuration file. Each file in this directory corresponds to a specific service that is managed by xinetd, such as telnet, ftp, ssh, etc. The name of the file matches the name of the service. The files in this directory contain service-specific options that override or supplement the global options defined in the /etc/xinetd.conf file. The files are read only when the xinetd service is started, so any changes require a restart of the service. The /etc/xinetd.d/ directory allows for a modular and flexible configuration of the xinetd service, as well as easier management and maintenance of the individual service files. Reference:
How to configure xinetd ? - Red Hat Customer Portal
Understanding /etc/xinetd.d directory under Linux
xinetd - Wikipedia


NEW QUESTION # 168
Which of the following words is used to restrict the records that are returned from a SELECT query based on a supplied criteria for the values in the records?

Answer: B

Explanation:
The correct keyword for restricting the records that are returned from a SELECT query based on a supplied criteria for the values in the records is WHERE. The WHERE clause is used to filter records based on one or more conditions. The syntax of the WHERE clause is:
SELECT column1, column2, ... FROM table_name WHERE condition;
The condition can be a logical expression that evaluates to true, false, or unknown. The condition can also use comparison operators, logical operators, and wildcards to specify the criteria. For example, the following query selects all the records from the employees table where the salary is greater than 50000:
SELECT * FROM employees WHERE salary > 50000;
The other options are incorrect because they have different purposes in SQL:
LIMIT is used to specify the maximum number of records to return from a query. For example, the following query returns only the first 10 records from the employees table:
SELECT * FROM employees LIMIT 10;
FROM is used to specify the table or tables from which to retrieve data. For example, the following query selects all the columns from the employees table:
SELECT * FROM employees;
IF is used to execute a block of code conditionally. For example, the following query updates the salary of an employee based on their performance:
UPDATE employees SET salary = IF(performance = 'excellent', salary * 1.1, salary) WHERE employee_id = 123; Reference:
https://bing.com/search?q=SQL+statements+restrict+records+based+on+criteria
https://stackoverflow.com/questions/11611931/sql-query-to-select-records-based-on-criteria


NEW QUESTION # 169
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:
etccronallow
Explanation:
The /etc/cron.allow file is a file that contains a list of users who are allowed to use the cron scheduling system. The cron scheduling system is a way of running commands or scripts at specified times or intervals. Users can create their own cron jobs by using the crontab command, which edits a file called crontab that stores the user's scheduled tasks. However, not all users may have access to the crontab command or the cron system. The access is controlled by two files: /etc/cron.allow and /etc/cron.deny. If the /etc/cron.allow file exists, then only the users listed in this file can use the crontab command and the cron system. The file should have one user name per line. If the /etc/cron.allow file does not exist, then the /etc/cron.deny file is checked. If this file exists, then the users listed in this file are denied access to the crontab command and the cron system. If neither file exists, then the access depends on the configuration of the cron daemon, which is the program that runs the cron jobs. By default, only the root user can use the cron system if no files exist. The root user can always use the cron system regardless of the existence or content of these files. To create or edit the /etc/cron.allow file, the root user needs to use a text editor such as vi, nano, or emacs. For example, to allow the users alice and bob to use the cron system, the root user can use the following command:
sudo vi /etc/cron.allow
And then add the following lines to the file:
alice bob
And then save and exit the file. Reference:
How cron.allow and cron.deny can be used to limit access to crontab for ...
/etc/cron.allow - Linux Bash Shell Scripting Tutorial Wiki
Linux / UNIX Restrict at / cron Usage To Authorized Users


NEW QUESTION # 170
What command displays all aliases defined in the current shell? (Specify the command without any path information)

Answer:

Explanation:
aliasaliasp
Explanation:
The alias command is used to create, list, or remove aliases in the current shell. An alias is a short name that refers to another command, usually with some options or arguments. Aliases are useful for saving typing time, avoiding spelling errors, or customizing the behavior of commands. To list all the aliases defined in the current shell, we can use the alias command without any arguments. This will print the aliases in the format of alias name='command'123. For example:
$ alias alias cp='cp -i' alias l='ls -CF' alias la='ls -A' alias ll='ls -alF' alias mv='mv -i' alias rm='rm -i' The output shows that some common commands, such as cp, mv, and rm, have aliases that add the -i option, which prompts the user before overwriting or deleting files. The l, la, and ll aliases are shortcuts for different variations of the ls command, which lists files and directories123.


NEW QUESTION # 171
......

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