touch

Example

1. Create a new file:

   touch new_file.txt
   

   This will create an empty file named new_file.txt in the current directory.

2. Update the time stamp of an existing file:

   touch existing_file.txt
   

   This will update the access and modification time stamps of the file named existing_file.txt to the current time.

3. Update the time stamp of a file with a specified time stamp:

   touch -t 202201011200 existing_file.txt
   

   This will update the access and modification time stamps of the file named existing_file.txt with the specified time stamp 202201011200.

4. Update the time stamp of a file with the time stamp of another file:

   touch -r reference_file.txt existing_file.txt
   

   This will update the access and modification time stamps of the file named existing_file.txt with the time stamp of the file named reference_file.txt.

5. Modify the modification time of a file:

   touch -m existing_file.txt
   

   This will only update the modification time stamp of the file named existing_file.txt to the current time, without updating the access time stamp.