What is the function of mren command in Linux?

The role and examples of the mren command in Linux

The Linux system is a multi-user, multi-task operating system that provides a wealth of command line tools to help users perform various operations. The mren command is also an important command in Linux, used to modify the access time, modification time and creation time of a file or directory. In this article, we will introduce the role of the mren command and its specific code examples.

1. The function of mren command

The mren command is used to modify the timestamp of a file or directory, including access time (atime), modification time (mtime) and creation time (ctime). Its format is as follows:

mren [options] file/directory

Options:
-a Modify access time only
-m Modify modification time only
-c Modify only Creation time
-t date Set the time of the file to the specified timestamp (the format is [YYYY.MM.DD] [HH:MM:SS])

2. Code example of mren command

1. Modify the access time of the file

Suppose there is a file named example.txt, and its access time needs to be modified to the current time. You can use the following command:

mren -a example.txt

2. Modify the modification time of the file

Assume there is a file named example.txt , its modification time needs to be modified to the specified timestamp. You can use the following command:

mren -m example.txt

3. Modify the creation time of the file

Assume there is a file named example.txt , its creation time needs to be modified to the specified timestamp. You can use the following command:

mren -c example.txt

4. Set the time of the file to the specified timestamp

Suppose there is a file named example For .txt files, the access time, modification time, and creation time need to be set to the specified timestamp. You can use the following command:

mren -t "2022.01.01 12:00:00" example.txt

5. Modify the timestamps of all files in the directory

Suppose there is a directory named example, and the timestamps of all files in the directory (including files in subdirectories) need to be modified to the current time. You can use the following command:

mren -a -R example

where the -R option indicates recursively traversing the directory.

6. View the timestamp of the file

Suppose there is a file named example.txt, and you need to view its access time, modification time and creation time. You can use the following command:

stat example.txt

This command will output detailed information including the file timestamp.

Summary:

The mren command is a utility tool used to modify the timestamp of files or directories in Linux systems. Through this command, we can easily modify the access time, modification time and creation time of the file, or set them to a specified timestamp. Through the above specific code examples, I believe that readers have a certain understanding of the use of the mren command. In actual use, we can flexibly use the mren command according to needs to improve the efficiency of file management. At the same time, if you want to learn more about the usage and options of the mren command, you can view its detailed help documentation through the man mren command.

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