Quick Answer: Who command in Unix with options and examples?

Who command option in Unix?

Definition of WHO Command in Unix. In Unix, “who” command allows to show or print the number of users who has been logged into your Unix computer system currently. The main usage of who command in Unix without command-line parameter is to show the name of the users who are logged in currently.

Who command syntax examples?

The basic syntax for using who command is as follows. 1. If you run who command without any arguments, it will display account information (user login name, user’s terminal, time of login as well as the host the user is logged in from) on your system similar to the one shown in the following output.

Who command option in Linux?

Description : The who command is used to get information about currently logged in user on to system.

Examples :

  • Login name of the users.
  • Terminal line numbers.
  • Login time of the users in to system.
  • Remote host name of the user.

Who command is used for?

Description. The who command displays information about all users currently on the local system. The following information is displayed: login name, tty, date and time of login. Typing who am i or who am I displays your login name, tty, date and time you logged in.

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Who command and its options?

wc stands for word count. As the name implies, it is mainly used for counting purpose. It is used to find out number of lines, word count, byte and characters count in the files specified in the file arguments.

Who command in Unix with syntax?

The Linux “who” command lets you display the users currently logged in to your UNIX or Linux operating system. Whenever a user needs to know about how many users are using or are logged-in into a particular Linux-based operating system, he/she can use the “who” command to get that information.

What are options in Linux?

An option, also referred to as a flag or a switch, is a single-letter or full word that modifies the behavior of a command in some predetermined way. A command is an instruction telling a computer to do something, usually to launch a program.

Who wc command in Unix?

The wc command in UNIX is a command line utility for printing newline, word and byte counts for files. It can return the number of lines in a file, the number of characters in a file and the number of words in a file. It can also be combine with pipes for general counting operations.

Is Unix a command?

A Unix shell is a command-line interpreter or shell that provides a command line user interface for Unix-like operating systems. The shell is both an interactive command language and a scripting language, and is used by the operating system to control the execution of the system using shell scripts.

What is use of who command in Linux answer?

Q:1 How to check current run level of a Linux server ? Ans: ‘who -r’ & ‘runlevel’ commands are used to check the current runlevel of a linux box.

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What does WHO do in Linux?

who is a command-line utility that prints a list of currently logged in users. It can also show the current run level, time of the last system boot, and more.

What is the output of who command *?

Explanation: who command output the details of the users who are currently logged in to the system. The output includes username, terminal name (on which they are logged in), date and time of their login etc. 11.