Who command in Unix with options and examples?

-a, –all Same as using the options -b -d –login -p -r -t -T -u.
-d, –dead Display dead processes.
-H, –heading Print a line of column headings.

Who command and its options?

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.

What is 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.

What does W command do in Linux?

w command in Linux is used to show who is logged on and what they are doing. This command shows the information about the users currently on the machine and their processes.

What is a shell in an operating system?

The shell is the outermost layer of the operating system. … A shell script is a sequence of shell and operating system commands that is stored in a file. When you log in to the system, the system locates the name of a shell program to execute. After it is executed, the shell displays a command prompt.

What is the general format of UNIX command syntax?

UNIX command lines can be simple, one-word entries like the date command. They can also be more complex: you may need to type more than the command name. There isn’t a single set of rules for writing UNIX commands and arguments, but you can use these general rules in most cases: Enter commands in lowercase.

Is who a Linux command?

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.

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