SysAdmin

This tutorial shows how to install and configure an SMTP server on Windows operating systems. Use SMTP for email exchange on the Internet.

Learn how to respond to a Signal 11 SIGSEGV error, what causes it and how to avoid the error in Linux and Kubernetes.

YUM is a powerful package manager for Linux. Cleaning your YUM cache frees up disk space and prevents metadata errors. This tutorial brings different ways to clear YUM cache.

The uname command is an important Linux utility that displays system information. This tutorial shows how to use the uname command in Linux and presents its useful options.

This tutorial shows the steps required for changing the default SSH port into a different one. A different port adds an extra layer of protection to the connection.

Postfix is a free mail transfer agent that uses SMTP to route and deliver emails. This tutorial shows how to configure Postfix to use an external SMTP server.

The CLI and GUI both serve the same purpose of facilitating the users' interaction with the OS. Read this article to learn the key differences between the two UIs.

The Linux tail command prints the last ten lines of a file to standard output. This tutorial shows how to use the tail command effectively.

The telnet command allows users to establish an unsecure connection to remote servers or machines. This tutorial shows how to use telnet and showcases its useful features.

The chpasswd command in Linux is a useful tool for batch-updating passwords. This article provides examples and explanations of how to use chpasswd for optimal security.