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Lpi LPIC-1 Exam 102, Part 2 of 2, version 5.0 Sample Questions (Q88-Q93):
NEW QUESTION # 88
Which of the following commands lists all defined variables and functions within Bash?
- A. set
- B. env
- C. echo $ENV
- D. env -a
Answer: A
Explanation:
The set command lists all defined variables and functions within Bash, including local, environment, and shell variables, as well as aliases and functions. The output of set can be very long, so it is often piped to less, grep, or other commands for filtering or paging. The set command can also be used to set or unset shell options and positional parameters. The -o posix option to set limits the output to only variables, as defined by the POSIX standard123.
The env command lists only the environment variables, which are a subset of the shell variables that are passed to child processes. The env command can also be used to run a command in a modified environment, or to print or set environment variables. The -a option to env is not valid in most implementations45.
The echo command prints a line of text to the standard output. The $ENV variable is not a predefined variable in Bash, but it can be set by the user or by other programs. If it is not set, echo $ENV will print a blank line1 . Reference:
NEW QUESTION # 89
What information is shown by the echo $? command?
- A. The process ID of the current shell.
- B. The process ID of the echo command.
- C. The exit value of the command executed immediately before echo.
- D. The process ID which will be used for the next command.
- E. The exit value of the echo command.
Answer: C
NEW QUESTION # 90
Which of the following commands display the number of bytes transmitted and received via the etho network interface? (Choose TWO correct answer.)
- A. Netstat -s -I etho
- B. Ifconfig etho
- C. Ip -s link show etho
- D. Ip stats show dev etho
- E. Route -v via etho
Answer: B,C
NEW QUESTION # 91
FILL BLANK
Which command included in NetworkManager is a curses application which provides easy acces to the NetworkManager on the command line? (Specify only the command without any path or parameters.)
Answer:
Explanation:
nmtui
NEW QUESTION # 92
Which of the following statements about sytemd-journald are true? (Choose three.)
- A. It supports syslog facilities such as kern, user, and auth.
- B. It is incompatible with syslog and cannot be installed on a system using regular syslog.
- C. It only processes messages of systemd and not messages of any other tools.
- D. It maintains metadata such as _UID or _PID for each message.
- E. It can pass log messages to syslog for further processing.
Answer: A,D,E
Explanation:
systemd-journald is a system service that collects and stores logging data from various sources, such as kernel, user-mode programs, and services1. It creates and maintains structured, indexed journals that include metadata and binary data where necessary1. The journal format is secure and unfakeable1. systemd-journald is not incompatible with syslog and can coexist with it. It can forward log messages to a syslog daemon for further processing, filtering, or storage2. This can be enabled by setting the ForwardToSyslog option to yes in the /etc/systemd/journald.conf file2. systemd-journald does not only process messages of systemd, but also messages of any other tools that use the standard logging interfaces, such as syslog(3), sd_journal_print(3), or systemd-cat(1)1. systemd-journald also supports syslog facilities, such as kern, user, and auth, which are used to specify the type of program that is logging the message3. These facilities can be used to filter the journal entries by using the -p or --priority option of the journalctl command4. For example, to show only kernel messages, we can use journalctl -p kern4. Reference:
systemd-journald.service
Introduction to the Systemd journal
systemd/Journal
journalctl: Query the systemd Journal
NEW QUESTION # 93
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