Ubuntu Interview Questions and Answers

Ques 1. What is the default package manager in Ubuntu?

The default package manager in Ubuntu is APT (Advanced Package Tool).

Example:

sudo apt-get install packageName

Ques 2. How do you update the package list with APT?

You can update the package list with the command: sudo apt-get update

Ques 3. Explain the purpose of the 'sudo' command.

The 'sudo' command is used to execute a command with administrative privileges.

Example:

sudo commandToExecute

Ques 4. How can you check the version of Ubuntu installed on your system?

You can check the Ubuntu version with the command: lsb_release -a

Ques 5. What is the purpose of the 'ls' command in Linux?

The 'ls' command is used to list files and directories in a directory.

Example:

ls

Ques 6. How do you find the IP address of your Ubuntu system?

You can find the IP address using the 'ifconfig' or 'ip addr' command.

Example:

ifconfig

Ques 7. What is the purpose of the 'grep' command?

The 'grep' command is used to search for a specific pattern or text in files.

Example:

grep pattern filename

Ques 8. How do you enable the UFW (Uncomplicated Firewall) in Ubuntu?

You can enable UFW with the command: sudo ufw enable

Ques 9. How do you check the available disk space in Ubuntu?

You can check disk space using the 'df' command. For example: df -h

Ques 10. What is the purpose of the 'tar' command?

The 'tar' command is used for compressing and archiving files and directories.

Example:

tar -cvzf archive.tar.gz /path/to/directory

Ques 11. How do you find the process ID (PID) of a running process in Ubuntu?

You can use the 'pgrep' or 'ps' command to find the PID of a running process.

Example:

pgrep processName

Ques 12. Explain the purpose of the '/etc/hostname' file.

The '/etc/hostname' file contains the hostname of the system.

Ques 13. How do you check the Ubuntu release codename?

You can check the release codename with the command: lsb_release -c

Ques 14. How do you check the CPU information in Ubuntu?

You can check CPU information using the 'lscpu' command.

Ques 15. Explain the purpose of the '/var/log' directory.

The '/var/log' directory contains log files generated by various system processes and services.