In-depth analysis of Linux command parameters and options usage skills

Linux View Command Usage Tips Revealed: Detailed Description of Parameters and Options

In the Linux system, the command line is a very powerful and efficient way of operating. Through reasonable use of commands The parameters and options allow us to complete the task more conveniently. This article will explain in detail the parameters and options of Linux commands, including how to view the help documentation of the command, how to use parameters and options correctly, etc., and explain it with specific code examples.

View command help documentation

In Linux, each command has detailed help documentation, which can be added by adding --help# after the command. ## or -h to view. For example, we can view the help document of the ls command in the following way:

ls --help

or

ls -h

The help document usually contains the basic usage of the command, available parameters and options, and some examples. By viewing the help documentation, we can better understand how to use the command.

Command parameters and options

In Linux commands, parameters are usually a required part of the command, while options are an optional part of the command, used to command behavior. Parameters and options usually start with

- or --, and the specific format can vary depending on the command. The following are some commonly used parameters and options examples:

Parameter examples:
1. cp source_file destination_file Here
   source_file and destination_file is the two parameters of the cp command, used to specify the source file and target file to be copied.
Option example:
2. ls -l
   -l here is an option of the ls command, used to display file details information.

Commonly used parameters and options

The following are descriptions of some commonly used parameters and options:

1. - r or -R: Execute the command recursively, processing all files in the directory.
2. -a: Display all files, including hidden files starting with ..
3. -l: Display file details in long format, including file permissions, owner, size, etc.
4. -i: Display the i-node number of the file.
5. -h: Display the file size in human-readable format, such as KB, MB, etc.

Combined use of parameters and options

In Linux commands, we can also use multiple options in combination to simplify command input. For example, we can use the

-l and -h options combined in the following way to display both the file details and the human-readable file size:

ls -lh

like this You can display both the file details and the human-readable file size in the output.

Summary

By rationally using command parameters and options, we can operate in the Linux system more efficiently. When using commands, be sure to pay attention to the order and format of parameters and options to avoid errors. In addition, it is recommended that you consult relevant information and documents when learning and using commands to better master the command usage skills.

I hope this article will help you understand the parameters and options of Linux commands. Thank you for reading!

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