1.7 manage software configurations

Question 1

Systemctl reload {service}

Answer 1

Re-read a system’s configuration files while the service runs.

Question 2

.rpmnew

Answer 2

An .rpmnew file contains the new default configuration file and leaves your original configuration file untouched.

Question 3

.rpmsave

Answer 3

.rpmsave file is a copy of your original configuration file, which has been replaced by the new default file.

Question 4

/etc/apt.conf

Answer 4

This file can be used to set debug options, configure proxy connections, and configure how APT caches packages.

Question 5

/etc/yum.conf

Answer 5

This file is the primary configuration file for yum commands.

Question 6

/etc/dnf/dnf.conf

Answer 6

The dnf configuration file.

Question 7

/etc/apt/sources.list.d

Answer 7

This file contains a list of URLs of software repositories.

Question 7

/etc/yum.repo.d

Answer 7

The repository used to store URLs references when pulling updates.

Question 7

sysctl command

Answer 7

Enables the viewing of kernel parameters at runtime.

Question 8

/etc/sysctl.conf

Answer 8

Enables configuration changes to a running Linux kernel.

Question 8

lsmod command

Answer 8

Used to display the currently loaded kernel modules.

Question 9

imsmod command

Answer 9

The imsmod command is used to add modules to the currently running kernel.

Question 10

rmmod command

Answer 10

Used to remove a module from the currently running kernel.

Question 10

insmod command

Answer 10

Used to install a module into the currently running kernel

Question 11

modprobe command

Answer 11

Used to add or remove modules from a kernel.
-n{conduct dry run}
-s{prints error}

Question 12

modinfo command

Answer 12

Used to display information about a particular kernel module.

Question 13

Syslog

Answer 13

The syslogd or rsyslogd daemon is responsible for logging of application and system events. It determines which events to log and where to place log entries, based on configuration settings in the /etc/syslog.conf (/etc/rsyslog.conf) file.

Question 14

chrony

Answer 14

A newer alternative, chrony, provides some benefits over the ntpd server, including:

Faster synchronization

Typically more accurate time

Improved response to clock frequency changes

No need for periodic polling of other NTP servers

Smaller (less memory and CPU utilization)

Question 15

timedatectl command

Answer 15

Sets system date and time information.

Question 16

localectl command

Answer 16

Views and configures the system locale and keyboard layout settings.