System Monitoring Chapter 11

What is the full path to the directory that contains log files, including secure, messages, [application], and kern.log?

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What is the full path to the directory that contains log files, including secure, messages, [application], and kern.log?

/var/log

You have just received an error message on your Linux server console, but you were not able to read all of it before it disappeared from the screen.

Which of the following log files would store a copy of the error message?

/var/log/messages

You are using the journald daemon for logging your system messages. You want to view all messages in the journal related to the Linux firewall.

Which of the following commands could you use to view the firewall information?

journalctl -u firewalld

Linux systems that use SysVinit (init) use the syslogd daemon to manage logging.
Which of the following daemons is used on newer system-based distributions to provide a local system log file?

journald

You are using the journald daemon for logging your system messages. You want to store notice messages but not info or debug messages.

Which of the following parameters would you set in the journald.conf file?

MaxLevelStore 5

There are several Linux commands available that let you view and manage binary log files.

From the list of these commands on the left, drag a command to the correct description on the right.

logrotate: Manages, compresses, renames, and deletes log files based on specific criteria (such as size or date).

sar: Displays CPU and other system statistics.

dmsg: Displays information about all the hardware controlled by the kernel.

logger: Changes the message severity and where logged messages are sent.

lastlog: Displays a list of the dates and times for the last login for each user.

There are several Linux commands available that let you view and manage text-based log files

From the list of these commands on the left, drag a command to the correct description on the right.

head: Displays the first ten lines of a text-based log file.

less: Lets you scroll through individual pages of a text-based log file.

cat: Displays the entire contents of a text-based log file.

grep: Filters text from a text-based log file.

tail: Displays the last 10 lines of a text-based log file.

There are several commands available that you can use with the Linux logrotate utility.

Several of these commands are listed on the left. Drag a command from the left to match it with the correct definition on the right.

create: Creates a log file with a name identical to the one just rotated.

rotate: Specifies the number of times to rotate the log before deleting it.

maxage: Removes rotated logs that are older than the specified number of days.

missingok: Prevents errors from being displayed for missing log files.

notifempty: Prohibits empty logs from being rotated.

Which of the following commands manages, compresses, renames, and deletes log files based on specific criteria such as size or date?

logrotate

You want to remove every rotated log older than 240 days. At the same time, you want to rotate the log file every week and ensure that there are no more than four archives.

Which of the following logrotate commands would you use in a script to meet these requirements?

weekly
rotate 4
maxage 240

Which of the following commands or utilities is a suite of tools that can help you detect, report, and resolve application crashes, as well as take steps to resolve the issue?ABRTYou have been experiencing several crashes on your Linux server over the past two days and want to use the ABRT utility to view information about all the crashes. Which of the following ABRT commands would give you the information you need?abrt-cli listYour Linux server has just crashed, and you want to use ABRT to generate a report that identifies the operating system and versions of RPM packages running when the system crashed. You don't want any private information included in the report. Which of the following ABRT components can you use to generate this report?uReportsYou want to generate a report that includes a description of each of the hardware components on your Linux server, as well as serial numbers and BIOS revisions. Which of the following utilities or commands can provide this information in a human-readable format?dmidecodeBelow is an illustration of information you displayed by entering a command at the root command prompt. Which of the following commands displayed this information?freeA technician executes a command that collects various OS usage statistics, provides report capability, and saves system activity information. Which of the following commands displays this information?sarWhich of the following sar commands can you use to view statistics for each processor and global statistics for all processors?sar -P ALLWhich of the following sysctrl command switches lets you permanently write a change to the kernel parameter at runtime?-wWhich of the following commands produced the following output? 06:14:11 up 139 days, 24 min, 5 users, load average: 0.12, 0.33, 0.48uptimeMary, a technician, is troubleshooting memory and performance issues on a system. Mary executes a command to show information about processes, memory, paging, block IO, traps, disks, and CPU activity. Which of the following commands did Mary use to view this information?vmstat