Touch to modify the file timestamp, or create a new file that does not exist-copy

Linux of the Touch commands are not commonly used, generally in use Make may be used to modify the file timestamp, or to create a new file that does not exist. .

1 . command format:

Touch [ options] ... File ...

2 . Command parameters:

-A or--time=atime or--time=access or--time=use only change the access time.

- C or--no-create do not create any documents.

- D use the specified date time instead of the current time.

- F This parameter ignores non-processing and is responsible only for compatibility issues with BSD version touch directives.

- M or--time=mtime or--time=modify only change the change time.

- R sets the datetime of the specified document or directory to the same date and time as the reference document or directory.

- T use the specified date time instead of the current time.

3 . Command function:

Touch the command parameter can change the date time of the document or directory, including access time and change time.  

4 . Examples of use:

Instance one: Create a file that does not exist

Command:

[[email protected] wxj]# Touch 123.txt

Output:

[Email protected]]# ll

Total Dosage 0

[[Email protected]]# Touch 123.txt

[Email protected]]# ll

Total Dosage 0

-rw-r--r--1 root root 0 3 Month 8 01:19123.txt

[[Email protected]]#

Example three: Setting the timestamp of a file

Command:

[Email protected] wxj]# touch-t 201212311111.11 123.txt

Output:

[Email protected]]# ll

Total Dosage 0

-rw-r--r--1 root root 0 Month 123.txt

[Email protected]]# touch-t 201212311111.11 123.txt

[Email protected]]# ll

Total Dosage 0

-rw-r--r--1 root root 0 Month 123.txt

[[Email protected]]#

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Touch to modify the file timestamp, or create a new file that does not exist-copy