ssh

How To Install SSH Server on Ubuntu 22.04 LTS

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In this tutorial, we will show you how to install SSH Server on Ubuntu 22.04 LTS. For those of you who didn’t know, OpenSSH is the premier connectivity tool for remote login with the SSH protocol. It encrypts all traffic to eliminate eavesdropping, connection hijacking, and other attacks. SSH is not installed or enabled on your Ubuntu 22.04 LTS system by default. This article assumes you have...

How To Setup SSH Keys on CentOS 8

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In this tutorial, we will show you how to set up SSH Keys on CentOS 8. For those of you who didn’t know, Secure Shell (SSH) is a cryptographic network protocol designed for a secure connection between a client and a server. Generally, there are two ways for clients to access their servers – using password-based authentication or public key-based authentication. Using SSH keys for authenticat...

How To Secure SSH Using Two Factor Authentication on Ubuntu 16.04 LTS

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In this tutorial, we will show you how to secure SSH using two-factor authentication on Ubuntu 16.04 LTS. For those of you who didn’t know, Securing SSH with two-factor authentication using Google Authenticator Two-step verification (also known as Two-factor authentication, abbreviated to TFA) is a process involving two stages to verify the identity of an entity trying to access services in a ...

How To Disable Root SSH Access on CentOS 7

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In this tutorial, we will show you how to disable root SSH access on your CentOS 7. By default when you install CentOS 7 and SSH server, the root account automatically has remote access via SSH. This can be dangerous. If the root account password falls into the wrong hands, your server is at the mercy of the bad guys with the password. They can delete every file and folder on the server and take...

How To Change SSH Port in Ubuntu

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In this tutorial, we will show you how to change the ssh port on the Ubuntu system. For those of you who didn’t know, SSH is a program and protocol for securely connecting to remote machines across a network. It allows you to run programs, and do a variety of tasks as if you were sitting at the machine. SSH is very similar to telnet except it is with encryption to protect the transferred infor...

How To Change SSH Port in CentOS

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In this tutorial, we will show you how to change the default ssh port on the CentOS system. For those of you who didn’t know, SSH is a program and protocol for securely connecting to remote machines across a network. It allows you to run programs, and do a variety of tasks as if you were sitting at the machine. SSH is very similar to telnet except it is with encryption to protect the transferr...

How To Replacing OpenSSH With Dropbear on CentOS

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In this tutorial, we will show you how to replace OpenSSH with Dropbear on CentOS. For those of you who didn’t know, Dropbear is a relatively small SSH server and client. It runs on a variety of POSIX-based platforms. Dropbear is open-source software, distributed under an MIT-style license. Dropbear is particularly useful for "embedded"-type Linux (or other Unix) systems, such as wireless rout...