command – Call and Execute the Specified Command

The command is a Linux command-line utility that allows users to execute a specified command, without any modifications or shell expansions. The command is usually used to execute a command that has the same name as a shell built-in command.

Overview

The command command in Linux is used to execute a specified command without any modifications or shell expansions. It is a shell built-in command that is used to call and execute the specified command. The syntax for using the command command is as follows:

command [options] [command [arguments]]

Here, the command is the name of the command that you want to execute, and the [options] are the various options that you can use with the command. The [command [arguments]] part is optional, and it specifies the command and its arguments that you want to execute.

Examples

Here are some examples of how to use the command command:

To execute the ls command without any shell expansions:

command ls

To execute the pwd command without any shell expansions:

command pwd

To execute the echo command without any shell expansions:

command echo "Hello, world!"

Specific Use Cases

The command command is particularly useful when you want to execute a command that has the same name as a shell built-in command. For example, if you want to execute the echo command without any shell expansions, you can use the command command as follows:

command echo "Hello, world!"

This will ensure that the echo command is executed without any shell expansions, and the output will be the string “Hello, world!”.

Options

Here are the available options for the command command:

Option	Description
-p	Use a default value for PATH that is guaranteed to find all of the standard utilities.
-v	Print a message to standard error that describes the command that is being executed.
-V	Print a message to standard error that describes the version of the command command.

Troubleshooting Tips

If you encounter any issues while using the command command, here are some troubleshooting tips:

• Make sure that you are using the correct syntax for the command command, as described in the Detailed Overview section.
• Check the available options for the command command and make sure that you are using the correct option(s).
• If you are trying to execute a command that has the same name as a shell built-in command, make sure that you are using the command command to execute the correct command.

Notes

• The command command is a shell built-in command, which means that it is built into the shell and does not require a separate executable file.
• The command command is often used in shell scripts to ensure that a command is executed without any shell expansions or modifications.