Linux touch command
touch – change file timestamps
Update the access and modification times of each FILE to the current time.
A FILE argument that does not exist is created empty, unless -c or -h is supplied.
A FILE argument string of – is handled specially and causes touch to change the times of the file associated
with standard output.Mandatory arguments to long options are mandatory for short options too.
Use
Example
touch -c -t 02011111 file
touch -c -t 020111112020 file
touch -r referencefile file