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This article introduces the knowledge of "how to use the Linux tee command". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The Linux system tee command reads from standard input and simultaneously writes standard output to one or more files. Tee is most commonly used in conjunction with other commands through pipes.

Syntax tee [- ai] [--help] [--version] [file.] Parameter:-an or-append appends to the existing file instead of overwriting it.

-I or-ignore-interrupts ignores the interrupt signal.

-help online help.

-version displays version information.

The tee command uses instance Q1. How can I use this command on Linux? Suppose you are using the ping command for some reason.

Ping google.com

Then at the same time, the information you want to output can be written to the file at the same time. At this time, the tee command has the opportunity to give full play to its talents.

The screenshot below ping google.com | tee output.txt shows that this output is not only written to the output.txt file, but also displayed in the standard output.

So you should understand the basic usage of tee.

Q2. How to ensure that the tee command appends information to the file? By default, using the tee command again under the same file overwrites the previous information. You can change the default settings with the-a command option if you want.

[command] | tee-a [file] basically, the-an option forces the tee command to append information to the file.

Q3. How to make tee write to multiple files? It's very simple. All you have to do is write down the file name.

[command] | tee [file1] [file2] [file3] for example:

Ping google.com | tee output1.txt output2.txt output3.txt

Q4. How can the output of the tee command be used directly as the input of another command? With the tee command, you can not only write the output to a file, but also use the output as input to another command. For example, the following command not only stores the file name in the output.txt file, but also lets you know the number of files entered into output.txt through the wc command.

Ls file* | tee output.txt | wc-l

Q5. How do I use the tee command to improve file write permissions? If you open the file using the Vim editor and make a lot of changes, then when you try to save the changes, you get an error that makes you realize that it is a file owned by root, which means you need to use sudo permissions to save the changes.

In this case, you can use the tee command (within Vim) to increase permissions.

: W! sudo tee% the above command will ask you for your root password, and then you can save the changes.

Q6. How do I make tee commands ignore interrupts? The-I command line option causes the tee command to ignore the interrupt signal (SIGINT) that is usually initiated by the ctrl+c key combination.

[command] | tee-I [file] this option is especially useful when you want to interrupt the command with ctrl+c while letting the tee command exit gracefully.

This is the end of "how to use the Linux tee Command". Thank you for your reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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