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ItвЂ™s an alternative to cron and anacron, however, it runs a task once at a given future time without editing any config files:ДЇor example, to shutdown the system at 23:55 today, run: $ sudo echo 'shutdown -h now' | at -m 23:55ДЄtq command is used to view jobs in at command queue: $ atqДЄtrm command is used to remove/deletes jobs (identified by their job number) from at command queue: $ atrm 2ДЇor more usage about at command, read: How to Use вЂatвЂ™ Command to Schedule a Task in Linux awk CommandДЄwk is a powerful programming language created for text processing and generally used as a data extraction and reporting tool.

You can use it as below to find all alive hosts on a network: $ sudo arp-scan -interface=enp2s0 -localnetДЄt command is used to schedule tasks to run in a future time.

$ sudo aptitude updateДЇor more usage on aptitude, read: Learn Debian Package Management with Aptitude Command arch CommandДЄrch is a simple command for displaying machine architecture or hardware name (similar to uname -m): $ archДЄRP ( Address Resolution Protocol) is a protocol that maps IP network addresses of a network neighbor with the hardware (MAC) addresses in an IPv4 network.

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Like apt-get and apt it can be used to install, remove or upgrade software packages on a system. $ sudo apt-get updateДЇor more apt-get usage, read: 25 Useful Commands of APT-GET for Package Management aptitude CommandДЄptitude is a powerful text-based interface to the Debian GNU/Linux package management system.

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It is used to install new software packages, remove available software packages, upgrade existing software packages as well as upgrade entire operating system.

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$ apropos adduserДЄpt tool is a relatively new higher-level package manager for Debian/Ubuntu systems: $ sudo apt updateДЇor more apt usage read: 15 Useful Examples on APT Command apt-get CommandДЄpt-get is a powerful and free front-end package manager for Debian/Ubuntu systems. Unlike its sister cron it assumes that a system will not run continuously, therefore if a scheduled job is due when the system is off, itвЂ™s run once the machine is powered on.ДЇor more information about anacron and cron read: Cron Vs Anacron: How to Schedule Jobs Using Anacron on Linux apropos CommandДЄpropos command is used to search and display a short man page description of a command/program as follows. anacron CommandДЄnacron is a Linux facility used to run commands periodically with a frequency defined in days, weeks and months. The above command will create an alias called home for /home/tecmint/public_html directory, so whenever you type home in the terminal prompt, it will put you in the /home/tecmint/public_html directory. It is helpful for creating new/custom commands from existing Shell/Linux commands (including options): $ alias home='cd /home/tecmint/public_html' Agetty is a substitute of Linux getty: $ agetty -L 9600 ttyS1 vt100ДЄlias is a useful shell built-in command for creating aliases (shortcut) to a Linux command on a system. Once it detects a connection, it opens a tty port, asks for a userвЂ™s login name and calls up the /bin/login command. $ sudo adduser tecmintДЇor more adduser and addgroup commands: 15 Practical Examples on adduser Command in Linux agetty CommandДЄgetty is a program which manages physical or virtual terminals and is invoked by init. The adduser and addgroup commands are used to add a user and group to the system respectively according to the default configuration specified in /etc/nf file.

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You can find the actual description of each Linux command in their manual page which you can access like this: $ man command-name In this article, we will introduce you a list of most frequently used Linux commands with their examples for easy learning. While others are generic Unix/Linux commands that youвЂ™ll find in all if not most mainstream distros. It is important to note that certain commands are вЂњdistro-basedвЂќ вЂ“ they can only be found in specific distros. We are bound to use a number of them on a daily routine or numerous times to perform common tasks than others. There are a countless number of commands in Linux.

Display directory tree linux mac os