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Guide to the 'who' Command: Check Current Logged-in Users
`who` command is used to display information about users currently logged into the system on Linux and Unix-like operating systems. It allows you to quickly check which users are logged in, through which terminals, and since when, making it a fundamental tool for system administration and monitoring. Learn how to use the `who` command and its main options through this guide.
whoami: Display the Current Logged-in Username
The `whoami` command prints the effective username of the current logged-in user. It is useful for quickly verifying which user is executing commands.
xargs: Pass input data as command arguments
`xargs` is a powerful utility that converts standard input into arguments for another command. It is particularly useful when piping the output of commands like `find` or `grep` to another command. The `-n` option specifies the maximum number of arguments to pass to a command at once, preventing too many arguments from being passed simultaneously and allowing for efficient control of command execution.
yes: Repeat strings indefinitely
The `yes` command repeatedly outputs a specified string (defaulting to 'y') on a new line. It is primarily used in scripts to automatically provide a 'y' or other response to user confirmation prompts. It continues to run until interrupted by pressing Ctrl+C.
zsh: The Z Shell
zsh is a powerful and highly customizable Unix shell. It incorporates many features from Bash, ksh, and tcsh, and offers significant improvements such as advanced autocompletion, themes, and a plugin system, making it popular among developers and power users.