The cracklib-check is a command line tool that enables to check password strength. This tool checks whether the password is based on a dictionary word, it is too short, it...

The pwgen is a command line tool that allows to generate random passwords. This tool is designed to generate secure passwords that can be easily memorized by humans. This tutorial...

There is no standard way to determine version of an installed program. Most of the programs allows to check their version via command line with --version option. This post presents...

DOS/Windows systems uses different text file line endings than Unix/Linux systems. On DOS/Windows line endings are represented as carriage return followed by line feed (CRLF or \r\n). However, Unix/Linux uses...

The whowatch is a command line tool that enables to monitor users and processes. This tool displays the currently logged in users and information about them such as login name...

The fping is a command line tool that allows to send ICMP echo requests to the network hosts to determine if a host is reachable. The fping is similar to...

Grafana supports a variety of data sources such as MySQL, PostgreSQL, Prometheus, InfluxDB, and others. In this tutorial we will demonstrate how to configure MariaDB as data source for Grafana...

Grafana is a cross-platform data visualization and analytics tool that can used for monitoring purposes. It fetches data from various data sources such as MySQL, Prometheus and visualizes data in...

The ipcalc is a command line tool that allows to calculate network and broadcast addresses, wildcard mask, host address range, and number of hosts for a given IPv4 address and...

The iotop is a command line tool that allows to monitor I/O usage by each process. This tool displays read and write speeds of a storage device, the percentage of...