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Lpi 010-160 (Linux Essentials Certificate Exam, version 1.6) exam is an entry-level certification exam designed to test the candidate's knowledge and understanding of Linux operating systems. 010-160 exam is ideal for those who are new to Linux or have basic knowledge of Linux and want to establish a solid foundation in Linux. 010-160 exam is vendor-neutral, which means that the skills and knowledge tested in the exam are applicable to all Linux distributions.
The Linux Professional Institute (LPI) is a non-profit organization that provides vendor-neutral certification exams for IT professionals. One of their most popular certifications is the Linux Essentials Certificate Exam, version 1.6 (010-160). 010-160 Exam is designed to test a candidate's basic knowledge of Linux and open-source software.
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The Lpi 010-160 exam is made up of 40 multiple-choice questions, and candidates are given 60 minutes to complete the exam. 010-160 exam is available in a variety of languages, including English, German, Spanish, Portuguese, and Japanese. 010-160 Exam is available at Pearson VUE testing centers around the world, making it accessible to candidates from all corners of the globe.
NEW QUESTION # 59
What is true about the dmesg command? (Choose two correct answers.)
Answer: B,E
Explanation:
The dmesg command is used to display the messages from the kernel that are stored in a ring buffer. A ring buffer is a fixed-size data structure that overwrites the oldest entries when it is full. Therefore, the dmesg command might not display older information because it was overwritten by newer information. The dmesg command is useful for troubleshooting system issues and checking hardware information. The dmesg command is not used to trace the execution of a command, send messages to user sessions, or output the system journal. Those functions are performed by other commands such as strace, write, and journalctl respectively. Reference: : [dmesg] : [Ring buffer] : [strace] : [write (Unix)] : [journalctl]4)
NEW QUESTION # 60
What can be found in the /proc/ directory?
Answer: E
Explanation:
The /proc/ directory is a virtual file system that contains information about the system and the processes running on it. It is not a conventional file system that stores files on a disk, but rather a dynamic view of the kernel's data structures. One of the features of the /proc/ directory is that it contains one subdirectory for each process running on the system, which is named after the process ID (PID). For example, the subdirectory /proc/1/ contains information about the process with PID 1, which is usually the init process. The process subdirectories contain various files that provide information about the process, such as its status, memory usage, open files, environment variables, command line arguments, and more. The /proc/ directory also contains a symbolic link called 'self', which points to the process that is accessing the /proc/ file system. Therefore, the correct answer is D. One directory per running process.
The other options are incorrect because:
A . One directory per installed program. This is not true, as the /proc/ directory does not contain information about installed programs, but only about running processes. Installed programs are usually stored in other directories, such as /bin/, /usr/bin/, /opt/, etc.
B . One device file per hardware device. This is not true, as the /proc/ directory does not contain device files, but only virtual files that represent kernel data. Device files are usually stored in the /dev/ directory, which is another special file system that provides access to hardware devices.
C . One file per existing user account. This is not true, as the /proc/ directory does not contain information about user accounts, but only about processes. User accounts are usually stored in the /etc/ directory, which contains configuration files, such as /etc/passwd/ and /etc/shadow/, that define the users and their passwords.
E . One log file per running service. This is not true, as the /proc/ directory does not contain log files, but only information files. Log files are usually stored in the /var/log/ directory, which contains various files that record the activities of the system and the services.
Reference:
The /proc Filesystem - The Linux Kernel documentation
A Beginner's Guide to the /proc File System in Linux - Tecmint
Appendix E. The proc File System Red Hat Enterprise Linux 6 | Red Hat ...
Chapter 5. The proc File System Red Hat Enterprise Linux 4 | Red Hat ...
proc file system in Linux - GeeksforGeeks
NEW QUESTION # 61
Which of the following examples shows the general structure of a forloop in a shell script?
for *.txt as file => echo $file
Answer: C
NEW QUESTION # 62
Which license best describes the GPL's core philosophy?
Answer: A
NEW QUESTION # 63
The file script.sh in the current directory contains the following content:
#!/bin/bash echo $MYVAR
The following commands are used to execute this script:
MYVAR=value
./script.sh
The result is an empty line instead of the content of the variable MYVAR. How should MYVAR be set in order to make script.sh display the content of MYVAR?
Answer: C
Explanation:
The reason why the script.sh does not display the content of the variable MYVAR is that the variable is not exported to the environment of the script. When a script is executed, it runs in a separate process that inherits the environment variables from the parent process, but not the shell variables. A shell variable is a variable that is defined and visible only in the current shell session, while an environment variable is a variable that is exported to the environment and visible to all processes that run in that environment1.
To make a shell variable an environment variable, we need to use the export command. The export command takes a shell variable name and adds it to the environment of the current shell and any subshells or processes that are created from it2. For example, to export the variable MYVAR with the value value, we can use:
export MYVAR=value
This will make the variable MYVAR available to the script.sh when it is executed, and the script will print the value of MYVAR as expected. Alternatively, we can also use the export command with the -n option to remove a variable from the environment, or with the -p option to list all the environment variables2.
The other options are not valid ways to set MYVAR as an environment variable. The !MYVAR=value option is not a valid syntax for setting a variable in bash. The env MYVAR=value option will run the env command with the MYVAR=value argument, which will print the environment variables with the addition of MYVAR=value, but it will not affect the current shell or the script.sh3. The MYVAR=value option will set MYVAR as a shell variable, but not as an environment variable, so it will not be visible to the script.sh1. The $MYVAR=value option will try to set the variable whose name is the value of MYVAR to the value value, which is not what we want4. Reference:
Linux Essentials Exam Objectives, Version 1.6, Topic 103.1, Weight 2
Linux Essentials Certification Guide, Chapter 3, Page 51-52
env(1) - Linux manual page
Bash Variables - LinuxConfig.org
NEW QUESTION # 64
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