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Enable SSH on Ubuntu 20.04 - Step by step guide ?

This article covers how to enable ssh on Ubuntu 20.04 LTS Linux system. In fact, the idea behind using SSH is to establish a secure connection with another computer in the network. However, the remote computer must have a running SSH server, otherwise, we won't be able to connect it using command or SSH client from our local computer.


How to Generate Public and Private Keys for SSH ?

  • Open command line- Terminal or Prompt on your local system.
  • Enter SSH key generator command that will generate the  key ssh-keygen.
  • Hit the Enter key.
  • (optional) Then you can enter a password in order to add an additional barrier when establishing the connection. Otherwise, simply press the Enter key two times, if you don't want the system to ask for an additional password query.
  • Ultimately, two files are created in the hidden directory ".ssh" under your user directory: "id_rsa" and "id_rsa.pub". The "rsa" in the file name stands for the cryptography used, but you don't have to worry about it. The file extension "pub" stands for "Public", so it is the public key. Whereas the file without any extension is your private key.

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Enable SSH on Ubuntu 18.04 System - How to do it ?

This article covers how to install and Enable SSH service on Ubuntu 18.04 system. You can now login remotely to your server using any SSH client from Linux or Windows system. To increase security of SSH connection by Changing default SSH port to custom one on you system. Get more details about SSH server from official SSH site.

When establishing a remote connection between a client and a server, a primary concern is ensuring security. For Linux users, the best practice of accessing and managing your server remotely is through the cryptographic protocol known as Secure Shell (SSH).


How to Enable SSH on Ubuntu ?

1. To install SSH, first update the package repository cache with:

$ sudo apt-get update

2. Now install the OpenSSH software package by entering:

$ sudo apt-get install openssh-server

If prompted, type in your password and press y (yes) to permit the installation.

3. To verify the installation was successful and SSH is running use the command:

$ sudo service ssh status

The confirmation message that you are looking for is: Active: active (running).

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