Dimas Maulana

When it comes to sending email notifications from a server, it’s important to convey information in a clear and recognizable manner. In this article, we’ll explore how to send a Postfix email with a custom form name using the -r option. This will allow us to define a sender name that helps recipients easily identify the source of the email. We’ll go through the process step by step, explaining each component and its significance.

Sharing folders using Samba on a Unity desktop environment is a convenient way to enable file sharing between Linux and Windows systems. Samba is an open-source software suite that provides seamless integration between Linux/Unix servers and Windows clients. Here’s a step-by-step guide on how to share a folder using Samba in the Unity desktop environment:

Step 1: Install Samba

If you haven’t already, you need to install Samba on your system. Open a terminal and run the following command to install Samba:

You can enhance your SSH experience by automatically starting a screen or byobu session when you log in via SSH. This can help you maintain your sessions, especially when working on remote servers. Here’s how to set it up:

1. Edit Your ~/.bashrc File: Open your ~/.bashrc file for editing using your preferred text editor. You can use a command like nano ~/.bashrc or vim ~/.bashrc.

2. Add the following code snippet to the end of your ~/.bashrc file:

When you need to modify file permissions recursively in a directory, you can use the chmod command along with the find command in Linux. Here are some commonly used commands to give different permissions to directories and files:

Recursively Give Directories Read & Execute Privileges

To recursively give directories read and execute privileges (755), you can use the following command:

Servers are not immune to security threats, especially when it comes to SSH (Secure Shell) access. Brute force attacks can compromise your server’s security. Fail2Ban is a tool that automatically defends your virtual private server (VPS) by monitoring log files and responding to malicious behavior. In this guide, we’ll walk you through setting up Fail2Ban on Ubuntu 12.04 to protect your SSH access.

Step 1: Install Fail2Ban

First, you need to install Fail2Ban using apt-get:

It’s essential to exercise caution when terminating user sessions or SSH sessions, as abruptly killing processes can lead to data loss or corruption. However, if you need to forcefully terminate a user’s session and their associated SSH session, you can follow the steps you’ve outlined. Below is a more detailed explanation of the commands you’ve mentioned:

1. Terminate the User’s Sessions:

To terminate a specific user’s sessions, you can use the pkill command followed by the -u option with the username.