Secure Shell (SSH) is an essential protocol for securely accessing networked machines remotely. SSH offers a secure channel over an unsecured network, providing strong authentication and encrypted data communications between two computers connecting over an open network such as the internet. Ubuntu 24.04, like its predecessors, supports SSH for remote administration, file transfer, and more. This guide will walk you through the process of enabling SSH on your Ubuntu 24.04 system, ensuring secure and remote management capabilities.
KeePassXC is a free and open source application we can use to safely manage our passwords and sensitive data. It can store usernames, passwords, URLs, and even file attachments. Data is encrypted and stored locally, in a “kdbx” file: this is the ideal solution if we don’t want to store sensitive information in the cloud.
Fail2ban is a free and open source software we can use to mitigate brute force and DoS/DDoS attacks: it scans log files for multiple failed authentication attempts and bans related IP addresses by creating ad-hoc firewall rules.
Whenever you first log in via SSH to your Raspberry Pi, you are greeted by the “motd” (message of the day). This message includes a bit of text and system information, along with the line
Raspberry Pi Debian GNU/Linux comes with absolutely no warranty. If you are getting sick of reading this repetitive information whenever you log in to your Raspberry Pi, then we have good news for you: it is relatively simple to change this message or to disable it completely. In this tutorial, you will see how to change or disable the message of the day (motd) for the Raspberry Pi.
Enabling X11 forwarding on the Raspberry Pi will allow you to run graphical applications on the device from your remote PC. This has some advantages over using xrdp or VNC on your Raspberry Pi, since the applications will look better since they are running on your local PC. In this tutorial, you will see how to enable X11 forwarding on a Raspberry Pi.
Setting up SSH on a Raspberry Pi allows one or more users to log in to the system remotely for administration or other tasks via a separate command line terminal. SSH is a client-server protocol that provides secure, encrypted connections over a network connection (could be a local network or over the internet). This allows users to SSH into the Raspberry Pi from another Linux system or other SSH client.
In the client-server architecture used by the SSH protocol, a client can authenticate by providing a tunneled clear text password or by using a public/private key pair: this is called public key authentication. A user who logs in via a public key on a remote machine has complete access to the command line; in certain situations, however, it may be useful to associate a public key to a single specific command, for security reasons.
The SSH protocol allows Linux administrators to log in to any number of remote systems from their own command line terminal. SSH is a client-server service providing secure, encrypted connections over a network connection. This allows us terminal access to other Linux systems or really any device that accepts SSH connections, such as routers and firewalls, and other operating systems.
The SSH protocol in Linux is used to manage remote systems. It works by allowing you to securely log in to a remote device, which could be another Linux system, firewall, router, etc. When you are finished with your remote administration, it will be time to disconnect from the SSH connection. In this tutorial, you will see various ways to disconnect from an SSH connection on a Linux system. You will also learn the escape characters to exit from an SSH session, which comes in handy if you encounter a hung system that you have an SSH connection into and need to return to your local terminal.
Cannot Open Display error can occur on a Linux system when trying to open a GUI application, especially if opening it from the command line. It can also pop up if you are trying to use X11 forwarding via SSH to a remote system. The good news is that this error is relatively easy to fix, whether you are getting it when accessing a local application or a remote server. In this tutorial, we will cover the steps necessary to fix the
Cannot Open Display error on Linux.
SSH (Secure Shell) is a protocol used to establish an encrypted connection with a remote machine using a client-server model: the ssh server runs on the machine we want to access remotely, while a client is used on the machines from which we want to connect. Thanks to sshfs, we can use an existing SSH connection to mount a remote directory in a secure way, without using additional services like NFS or Samba.
If you frequently use your Linux system to connect to a specific host, it can be convenient to make an alias for the hostname or IP address. This is especially true if the host has a long name or URL, and you do not want to keep typing the whole thing out every time you need to connect. There are several ways to create a host alias on Linux, depending on how you ordinarily connect to the host.