Linux and Unix settime and touch
Change file access and modification time.
touch [-a] [-c] [-m] [-r ref_file | -t time ] file
settime [ -f ref_file ] file
|-a||Change the access time of file. Do not change the modification time unless -m is also specified.|
|-c||Do not create a specified file if it does not exist. Do not write any diagnostic messages concerning this condition.|
|-m||Change the modification time of file. Do not change the access time unless -a is also specified.|
|-r ref_file||Use the corresponding times of the file named by ref_file instead of the current time.|
|-t time||Use the specified time instead of the current time. time will be a decimal number of the form:
MM - The month of the year [01-12].
|-f ref_file||Use the corresponding times of the file named by ref_file instead of the current time.|
|file||A path name of a file whose times are to be modified.|
Sets the file myfile.txt as the current time and date.
Creates a file known as "newfile.txt", if the file does not already exist. If the file already exists the accessed and modification time is updated for the file newfile.txt