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How to set up an FTP web server on macOS

File Transfer Protocol (FTP) is a standard network protocol used to transfer files from one host to another over a TCP-based network, such as the Internet. Setting up an FTP…

How to Fix “Your connection is not secure” in Firefox

When browsing the web using Firefox, you may encounter SSL certificate errors, such as “Your connection is not secure” (SEC_ERROR_UNKNOWN_ISSUER or SSL_ERROR_BAD_CERT_DOMAIN). These errors occur when Firefox cannot verify the…

How to Setup nmon – Monitor Linux Performance

Nmon (Nigel’s Monitor) is a great performance monitoring tool for Linux operating system. It was written initially for AIX to monitor system performance. nmon for Linux can be used to…

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How to Check Linux System Reboot Date and Time

As a Linux system administrator, it is essential to know when your system was last rebooted. This information can be useful for troubleshooting and maintenance purposes. In this tutorial, we…

How to Print Unique Lines from a File in Linux?

In Linux, it’s often necessary to extract unique lines from a file. This task, while seemingly straightforward, can be a bit complex for beginners or those unfamiliar with Linux commands….

How to Check the Ubuntu Version

How to Check Ubuntu Version

Ubuntu, a popular Linux distribution, undergoes regular updates and releases. Knowing the version of Ubuntu you’re running can be crucial for various reasons, such as software compatibility, troubleshooting, or when…

How to Install Nagios Monitoring Server on CentOS 6.5

Nagios is one of the alternate open source computer, network and infrastructure monitoring system that will help organizations to identify and resolve IT infrastructure problems before they affect critical business…