Usage of head command

The head command is used to display the content at the beginning of the file. By default, the head command displays the first 10 lines of the file. Syntax: head [option]... [file]...

The head command is used to display the content at the beginning of the file. By default, the head command displays the first 10 lines of the file. The specific usage is as follows:

1. Syntax: head [option]... [file]...
2. Option:

• -c , --bytes=[-]K displays the first K bytes of each file; if the "-" parameter is appended, all remaining contents except the last K bytes of each file are displayed
• - n, --lines=[-]K displays the first K lines of each file; if the "-" parameter is appended, all remaining contents except the last K lines of each file are displayed
• -q, --quiet, --silent Do not display the file header containing the given file name
• -v, --verbose Always display the file header containing the given file name
• --help display This help message and exit
• --version Display version information and exit

1. Parameters: File list: Specify the file list to display the header content.

When using the head command, you can choose different options and parameters as needed. For example, to display the first 10 lines of a file, you can use the following command:

head filename.txt

If you want to display the first 5 lines of each file, you can use the following command:

head -n 5 file1.txt file2.txt

If you want To display the first 20 bytes of each file, you can use the following command:

head -c 20 file1.txt file2.txt

In short, the head command is a very practical command line tool for quickly viewing the beginning of the file.

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