Which statement is true concerning the use of the OR filter?
A) It will not affect your results.
B) It will narrow your results.
C) It will return a small set of results.
D) It will return a result if either condition is present.
D
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What does it mean to prompt the user?
What will be an ideal response?
Case-Based Critical Thinking QuestionsCase 4-3Sam is trying to decide the best way to design the background of his web page. He would like to add background images and background styles to his design. He needs to understand how browsers load a background image as well as learn about background style properties. Sam wants to change the position of an image on his web page. He wants to place the background image 30 pixels to the right of the element's left border and center it vertically. The style used ____.
A. background-position: 30px; B. background-position: 10px; C. background-position: 20px; D. background-position: center, 30px;
____________________ are used to specify the maximum disk space allocated to each user.
Fill in the blank(s) with the appropriate word(s).
How can you run journalctl and see all log entries?
BONUS TOOL: Journalctl The CyberOps Workstation VM is based on Arch Linux. Categorized as a Linux distribution, Arch Linux is designed to be lightweight, minimalist, and simple. As part of this design philosophy, Arch Linux uses systemd as its init system. In Linux, the init process is the first process loaded when the computer boots. Init is directly or indirectly the parent of all processes running on the system. It is started by the kernel at boot time and continues to run until the computer shuts down. Typically, init has the process ID 1. An init system is a set of rules and conventions governing the way the user space in a given Linux system is created and made available to the user. Init systems also specify system-wide parameters such as global configuration files, logging structure, and service management. Systemd is a modern init system designed to unify Linux configuration and service behavior across all Linux distributions and has been increasingly adopted by major Linux distributions. Arch Linux relies on systemd for init functionality. The CyberOps Workstation VM also uses systemd. system-journald (or simply journald) is systemd’s event logging service and uses append-only binary files serving as its log files. Notice that journald does not impede the use of other logging systems such as syslog and rsyslog. This section provides a brief overview of journalctl, a journald utility used for log viewing and real-time monitoring. a. In a terminal window in the CyberOps Workstation VM, issue the journalctl command with no options to display all journal log entries (it can be quite long):
[analyst@secOps ~]$ journalctl Hint: You are currently not seeing messages from other users and the system. Users in groups 'adm', 'systemd-journal', 'wheel' can see all messages. Pass -q to turn off this notice. -- Logs begin at Fri 2014-09-26 14:13:12 EDT, end at Fri 2017-03-31 09:54:58 EDT Sep 26 14:13:12 dataAnalyzer systemd[1087]: Starting Paths. Sep 26 14:13:12 dataAnalyzer systemd[1087]: Reached target Paths. Sep 26 14:13:12 dataAnalyzer systemd[1087]: Starting Timers. Sep 26 14:13:12 dataAnalyzer systemd[1087]: Reached target Timers. Sep 26 14:13:12 dataAnalyzer systemd[1087]: Starting Sockets. Sep 26 14:13:12 dataAnalyzer systemd[1087]: Reached target Sockets. Sep 26 14:13:12 dataAnalyzer systemd[1087]: Starting Basic System. Sep 26 14:13:12 dataAnalyzer systemd[1087]: Reached target Basic System. Sep 26 14:13:12 dataAnalyzer systemd[1087]: Starting Default. Sep 26 14:13:12 dataAnalyzer systemd[1087]: Reached target Default. Sep 26 14:13:12 dataAnalyzer systemd[1087]: Startup finished in 18ms. Sep 26 14:14:24 dataAnalyzer systemd[1087]: Stopping Default.The output begins with a line similar to the one below, marking the timestamp where the system started logging. Notice that the timestamps will vary from system to system.
-- Logs begin at Fri 2014-09-26 13:22:51 EDT, end at Fri 2017-03-31 10:12:19 EDT. –-journalctl includes a number of functionalities such as page scrolling, color-coded messages and more. Use the keyboard up/down arrow keys to scroll up/down the output, one line at a time. Use the left/right keyboard arrow keys to scroll sideways and display log entries that span beyond the boundaries of the terminal window. The
Hint: You are currently not seeing messages from other users and the system.
Users in groups 'adm', 'systemd-journal', 'wheel' can see all messages.
Pass -q to turn off this notice.
This message reminds you that, because analyst is a regular user and not a member of either the adm, systemd-journal or wheel groups, not all log entries will be displayed by journalctl. It also states that running journalctl with the –q option suppresses the hint message.