Linux Fundamentals - Enabling Secure Shell (SSH) on the Linux Server

This video tutorial explains how to enable and configure SSH on a Linux computer, particularly within a Docker container running Ubuntu. It covers the basics of SSH, including its use for secure remote connections, and details the steps to install the OpenSSH server package. The tutorial also demonstrates how to publish internal ports to external ones for SSH access and how to create a new user for secure SSH connections, emphasizing security measures like avoiding root user access.

What is the primary purpose of the SSH protocol?

• To manage file transfers between local and remote systems

• To compress data for faster transmission

• To encrypt communication between two hosts

• To provide a graphical interface for server management

Which port is typically used by SSH for communication?

• Port 443

• Port 80

• Port 22

• Port 21

What Docker option is used to publish an internal port to an external port?

• docker run -d

• docker run -p

• docker run -v

• docker run -e

Why is the SSH command initially not found in the Ubuntu Docker container?

• The SSH service is disabled by default

• The container is using a different operating system

• SSH is not pre-installed in the Ubuntu image

• The container is not connected to the internet

What command is used to install the OpenSSH server on Ubuntu?

• apt-get install openssh-server

• yum install openssh-server

• dnf install openssh-server

• pacman -S openssh-server

What is a default security measure regarding SSH access for the root user?

• Root access is allowed by default

• Root access is blocked by default

• Root access requires a special key

• Root access is only allowed on weekends

Which command can be used to create a new user in Linux?

• Neither useradd nor adduser

• Both useradd and adduser

• adduser

• useradd