In this tutorial, we will show you how to setup an SFTP server on Ubuntu 22.04 Jammy Jellyfish.
ssh
Allow SSH root login on Ubuntu 22.04 Jammy Jellyfish Linux
SSH (Secure Shell) is used to handle network services securely over an unsecured network. Some examples include: remote command-line, login, and remote command execution.
SSH remote login syntax and examples
The SSH protocol in Linux is used to manage remote systems. Ordinarily, this would be another Linux system, but it could also be a firewall, router, or even a different operating system entirely. Using the SSH protocol to remotely log into another system will give you a command line terminal that you can fully access as if you were physically in front of the machine.
Enable/Disable Last Login Message on Linux using hushlogin
When logging into a Linux system from the terminal, especially via SSH, you may have noticed some output that gives information about the last login.
Ubuntu 20.04 ssh root login enable
The purpose of this tutorial is to enable root login over SSH on Ubuntu 20.04 Focal Fossa Linux. After installing OpenSSH, logging into the root account is disabled by default. This is done for security purposes. In case an account is compromised, it means the attacker will not automatically have root permissions as well.
How to connect to VirtualBox via SSH
After installing a Linux distribution in Oracle VirtualBox, you may be wondering how you can SSH from the host operating system into the virtual machine. After all, SSH is a great way to access and manage the system on command line.
Install SSH server Ubuntu 22.04
SSH is the primary method of remote access and administration on Ubuntu 22.04 Jammy Jellyfish and other Linux systems. SSH is a client-server service providing secure, encrypted connections over a network connection. After installing Ubuntu 22.04, it may be one of the first things you want to configure.
How to use rsync over ssh
rsync stands for “remote sync” and is a powerful command line utility for synchronizing directories either on a local system or with remote machines. It’s built into nearly every Linux system by default which allows users to perform rsync over ssh communication/backup.
How to disable user login with Linux nologin
At some point, the time will come when a system administrator needs to disable user accounts on a Linux system. This can be achieved by Linux nologin technique. Some common reasons for disabling user accounts are due to some suspicious user activity, or perhaps due to a user’s work contract termination.
How to secure SSH best practices
SSH is the primary method of remote access and administration on Linux systems. SSH is a client-server service providing secure, encrypted connections over a network connection.
WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!
When you use SSH to login to a remote system, the host’s identification key is stored inside your user’s home folder. If you try to SSH into the remote system again in the future, your computer will check to make sure that you’re logging into the same system as before. Sure, the IP address or hostname might be the same, but maybe a different system has taken over that IP or hostname. If that’s the case, you wouldn’t want to enter your password into the foreign system.
When this is detected, you’ll receive a warning to the effect of WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!. Then again, sometimes a remote host’s keys could have changed for a perfectly legitimate reason. If you know this to be true, then you can ignore the warning.
In this guide, we’ll show you how to bypass the SSH remote host warning, as well as permanently remedy the problem on a Linux system. Read on to see how.
In this tutorial you will learn:
- How to remove invalid SSH host key from config
Fixing the remote host has changed warning message
Executing commands remotely with ssh and output redirection
The SSH command can be used to remotely login to a server running an sshd daemon. This allows Linux administrators to perform variety of administrative jobs. However, SSH is more powerful than just providing a user with remote shell access, as it can also be used to automate remote command executions, like running simple backups and downloading the backup file locally.
In this guide, we’ll go over a few different command line examples to show how you can execute commands on a remote system via SSH, as well as direct the output back to your local machine.
In this tutorial you will learn:
- Examples for remote command execution via SSH