who command in Linux Ubuntu

who Command in Linux / Ubuntu

who command used to displays the information about logged-in users, when the system has booted last time on Linux operating system. Syntax: who [options] [filename] who Command in Linux with Examples 1.To display the information (login name) about current logged-in users, use who command in terminal. By default who command displays the following information about …

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wall command in Linux Ubuntu

wall command in Linux / Ubuntu

wall command is used to broadcast the messages or the contents of a file to all the currently logged-in users on the terminals in the Linux system. The message can be typed on the terminal or the contents of a file. When superuser or root user broadcast the messages, all users receive the messages. In …

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nmap command in Linux Ubuntu

nmap command in Linux / Ubuntu

nmap command also known as Network Mapper is used for network exploration and security auditing. Syntax for Nmap:- nmap Option Target Use of nmap command Network exploration and security auditing Search for network connectivity issues, and scan for open ports Detect the Mac address, OS type Installing nmap Earlier Nmap was released only for Linux. …

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chmod command in Linux

chmod command in Linux / Ubuntu

chmod is mainly used to modify file permissions in Linux. chmod can be used to control who can access files, search directories. In this tutorial, we will learn about chmod command in Linux / Ubuntu. Viewing The File Permissions To view the file permission of files and directories you can use ls -l in the …

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