Linux administration

Question 1

What command is used to check the system’s uptime?

Answer 1

uptime

Question 2

How do you view the currently logged in users?

Answer 2

who or w

Question 3

What is the purpose of the ‘top’ command in Linux?

Answer 3

displays system processes and their resource usage

Question 4

How do you check the system’s load average?

Answer 4

uptime or w command.

Question 5

What command is used to view the system’s hardware information?

Answer 5

lshw or lspci command.

Question 6

How do you add a new user in Linux?

Answer 6

adduser or useradd command.

Question 7

What is the purpose of the ‘sudo’ command?

Answer 7

Allows users to execute commands with superuser privileges.

Question 8

How do you change the password for a user in Linux?

Answer 8

passwd [username] command.

Question 9

What is the purpose of the ‘passwd’ command?

Answer 9

Changes user password.

Question 10

How do you give a user administrative privileges in Linux?

Answer 10

sudo usermod -aG sudo [username].

Question 11

How do you configure a static IP address in Linux?

Answer 11

Edit the network configuration file or use ip command.

Question 11

What command is used to view the system’s IP address configuration?

Answer 11

ifconfig or ip addr show command.

Question 11

What is the purpose of the ‘ifconfig’ command?

Answer 11

Displays network interface information.

Question 12

What command is used to view the system’s disk space usage?

Answer 12

df command.

Question 13

How do you restart a network service in Linux?

Answer 13

sudo systemctl restart [service] or sudo service [service] restart.

Question 14

How do you add a new group in Linux?

Answer 14

groupadd command.

Question 15

How do you set up a firewall in Linux?

Answer 15

Using iptables command or firewall management tools like ufw.

Question 16

How do you check the status of a service in Linux?

Answer 16

systemctl status [service] command.

Question 16

What is the purpose of the ‘iptables’ command?

Answer 16

Manages firewall rules.

Question 17

What command is used to start a service in Linux?

Answer 17

systemctl start [service] command.

Question 18

How do you configure automatic system updates in Linux?

Answer 18

Configure automatic updates through package manager settings.

Question 19

What is the purpose of the ‘cron’ service?

Answer 19

Schedules tasks to run at specified times.

Question 20

How do you schedule a task to run at a specific time using cron?

Answer 20

Editing the cron jobs using crontab -e command.

Question 21

What is the purpose of the ‘rsync’ command in Linux?

Answer 21

Synchronizes files and directories between two locations.

Question 22

How do you check for available software updates in Linux?

Answer 22

apt update or yum update command.

Question 23

What is the purpose of the ‘apt’ command?

Answer 23

Manages software packages in Debian-based distributions

Question 24

How do you install a package in Debian-based Linux distributions?

Answer 24

sudo apt install [package].

Question 25

How do you install a package in Red Hat-based Linux distributions?

Answer 25

sudo yum install [package].

Question 26

What command is used to uninstall a package in Linux?

Answer 26

sudo apt remove [package] or sudo yum remove [package].