102-500 Exam Dumps and Practice Questions

The server option is used to configure a persistent association with a remote server or peer. It takes an argument that is either a host name or a numeric IP address of the NTP server. The ntpd daemon will periodically send NTP packets to the specified server and adjust the local clock according to the received responses. Multiple server options can be used to specify more than one NTP source. For example, the following lines in the /etc/ntp.conf file configure four external NTP sources:

server 0.asia.pool.ntp.org

server 0.oceania.pool.ntp.org

server 0.europe.pool.ntp.org

server 0.north-america.pool.ntp.org

https://docs.ntpsec.org/latest/ntp_conf.html

https://vceguide.com/which-option-in-the-etc-ntp-conf-file-specifies-an-external-ntp-source-to-be-queried-for-time-information-2/

https://vceguide.com/which-option-in-the-etcntp-conf-file-specifies-an-external-ntp-source-to-be-queried-for-time-information/

The iconv command is used to convert the encoding of a file from one character set to another. A character set is a collection of characters that are assigned numerical values called code points. Different character sets may use different numbers of bytes to represent each character, and may have different mappings of code points to characters. For example, ASCII is a single-byte character set that encodes 128 characters, while UTF-8 is a variable-length character set that can encode over a million characters. The iconv command can convert between many different character sets, such as ASCII, UTF-8, ISO-8859-1, etc. The basic syntax for using the command is as follows:

iconv [options] -f from-encoding -t to-encoding input-file > output-file

The -f option specifies the encoding of the input file, and the -t option specifies the encoding of the output file. The input file is read from standard input, and the output file is written to standard output, unless specified otherwise.The iconv command can also list all the supported character sets with the -l option1234.Reference:

How To Use the iconv Command on Linux - How-To Geek

iconv command in Linux with Examples - GeeksforGeeks

iconv - convert file encoding from one character set to another | Linux ...

Using iconv to change character encodings - FileFormat.Info

The configuration file that contains the default options for SSH clients is /etc/ssh/ssh_config. This file is read by the ssh program when it connects to a remote SSH server. It can contain global options that apply to all hosts, or host-specific options that only apply to certain hosts or patterns. The /etc/ssh/ssh_config file is the system-wide default SSH client configuration file. It can be overridden by a user-specific configuration file ~/.ssh/config, which is located in the user's home directory.The /etc/ssh/ssh_config file is part of the topic 110.1: Perform security administration tasks, which is one of the objectives of the LPI Linux Administrator - 102 exam12.Reference:1:LPI Linux Administrator - 102 (LPIC-1)2:Exam 102 Objectives

The batch command is similar to the at command, except that it executes commands when the system load levels permit; in other words, when the load average drops below 1.5, or the value specified in the invocation of atd1. The at command allows us to schedule jobs using any of two commands: at and batch.While at runs commands at our specified time, batch runs commands when our system's load average is below 0.82.Both commands read commands from standard input or a specified file, and both commands send the output of the commands to the user by mail1.Therefore, the main difference between them is the time of execution: at runs at a fixed time, while batch runs when the system is idle.Reference:1:Linux At, Batch, Atq, Atrm Command Help and Examples - Computer Hope2:The ''at'' Command in Linux | Baeldung on Linux

The configuration file for the OpenSSH server is called sshd_config. It is typically located in /etc/ssh on most *NIX systems, but is /etc/sshd_config in the case of MacOS X and perhaps other systems. OpenSSH has two different sets of configuration files: one for client programs (ssh, scp, and sftp) and one for the server daemon (sshd).System-wide SSH configuration information is stored in the /etc/ssh/ directory1.Reference:1:Where is the configuration file for OpenSSH server?