In-depth discussion on the usage skills of more command under Linux

Advanced usage of the more command under Linux

In the Linux system, the more command is a basic command for viewing file contents in pages. It allows users to display file contents by page and provides simple page up and down functions. However, in addition to basic usage, the more command also has some advanced usage that can help users process file content more conveniently. This article will introduce some more advanced usage of the more command and provide specific code examples.

1. Find keywords

It is very useful to use the more command to find specific keywords. By using "/" plus a keyword, you can quickly locate the line in the text that contains the keyword. Here is an example:

$ more file.txt
/keyword

The above command will open the file named file.txt and locate the first line containing the keyword "keyword". The user can find the next matching line by pressing the "N" key.

2. Display line number

Sometimes, we need to display the line number of the file to better track the file content. In the more command, line numbers can be displayed by using the "-n" option. Here is an example:

$ more -n file.txt

The above command will open a file named file.txt and display the line number in front of each line.

3. Ignore blank lines

In some cases, we may only care about the lines with content in the file and want to ignore blank lines. In the more command, use the "-s" option to achieve this function. The following is an example:

$ more -s file.txt

The above command will open a file named file.txt and ignore blank lines when displaying the content.

4. Display help information

When we encounter problems when using the more command or need to know more information about the command, we can use "-h" option to view help information. The following is an example:

$ more -h

The above command will display detailed help information for the more command, including various options and usage instructions of the command.

5. Use more in combination with other commands

The more command also supports combination with other commands to achieve more complex operations. The following are some examples:

• Combined with the grep command: Using a pipe to use the output of the grep command as the input of the more command can realize the function of finding specified keywords in the file.

$ grep "keyword" file.txt | more

The above command will search for the keyword "keyword" in the file named file.txt, and pass the line containing the keyword as input to the more command for paging display.

• Combined with the awk command: By combining the awk command, the file content can be filtered and processed, and then the processing results are passed to the more command for display.

$ awk 'condition' file.txt | more

The above command will filter the file named file.txt under specific conditions, and then pass the processing results to the more command for display.

Summary:

This article introduces some advanced usage of the more command and gives specific code examples. These advanced usages can help users process file content more conveniently and improve work efficiency. For more command options and usage methods, users can learn more by consulting the help documentation of the more command. I hope this article will be helpful to everyone when using the more command under Linux!

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