Linux, Windows, Security, Programming, Network Tutorials
Php provides web-based functionalities to develop web applications. But it also provides system related scripting and execution features. The exec() function is used to execute an external binary or program from a PHP script or application. In this tutorial, we will look at different use cases and examples of exec() function like return value, stderr, … Read more
Linux provides different philosophy and use cases from system point of view. `socat` is very interesting command which provides us the ability to redirect input and outputs from different type of system resources like network, file, command, socket etc. Install For Debian, Ubuntu, Mint and Kali socat can be install dpkg based distributions like below … Read more
Windows experts named Mark Russinovich and Bryce Cogswell have started writing simple but useful tools in 1996. They are provided these tools in those books related to Windows system internals. These tools became popular and released by them. They can be downloaded from a lot of alternative locations but their official repository is provided below. … Read more
Operating systems have a lot of configurations. These configurations are stored in different ways in different locations. One of the most common storage for some generic information like Username, operating system path etc. is environment variables. In this tutorial we will look how to list, get and set Windows operating system environment variables in details. … Read more
Windows operating system have a lot of third party tools used to get detailed system information like operating system, version, boot time, processor etc. We will look simple single command systeminfo to get detailed system information. List Information We will just issue the systeminfo command to get information about the computer. $ systeminfo We will get following … Read more
In computing RAM or Random Access Memory is very important. RAM technology is evolving in years. At the end of 90’s we were using 128 MB RAM. Yes 128 MB it is not joke. Today we are talking about 64, 128 GB RAMs for Laptops and Desktops. In this tutorial we will look details about … Read more
Linux uptime command is a simple command used to display how many times ago the computer or server restarted. Uptime command provides following information too; Current Time How lon the system has been running How may users currently logged in System avarage load in last 1, 5, 15 minutes Show Uptime We can show uptime … Read more
Linux has a lot of tools to display file content. cat, less, tail, etc. are some of them. They have different features and usage areas. The tail is mainly developed and used to display the end of the file. We will look at different features and usage examples of the tail command. tail Command Syntax We … Read more
Linux has a lot of different system metrics and performance monitoring tools. Sysstats provide a bunch of tools for monitoring purposes. This project is maintained by Sebastien Godard. This tool collects and reports system activity information about different aspects of the system like CPU, network, disk, tape, io, etc. Sysstat tool dependencies are low which … Read more
Backup is the act of creating a redundant clone of existing data or system. Backup can be done in personal computers or corporate systems. One of the important jobs of System Administrators is taking backups. Actually taking simply backup is not enough because for a professional system there needs to be a backup policy. The … Read more