There are numerous files that must be downloaded from the site twice daily. The file names change based on date. Looking at the system, I am thinking the the script must also remove the files first before downloading new ones because there will be some overlap in the dates. The site I am downloading the files from is Index of /tiziana/rhuff there are two subdirectories which will be based on the year month and date. The latter contains the more recent files. I wanted to store the files for three days but I don't think that is possible unless I rename the files in the script prior to downloading the new ones. So just to keep it simple lets say I remove all files prior to copying the new ones. So there are three things that need to be done.

1.Remove the current files.
That could be done with a simple remove all files from directory (but keep the directory) command which I am not sure how to do.

2. Have a command copy ALL FILES and keep the same file name conventions stored on a specified directory.

3. Repeat twice daily at a specified time.

I understand what you are saying about the crontab function. Am I correct in assuming that I would need to write a script that does functions 1 & 2 and then enter the function manually that used the crontab function to initiate the script automatically with the name of the script being bin/myscript based on your prior post? If so, How would I write the code for the first two steps?