Direct mail is a broad term that includes the following types of mailed promotions: Institutional direct mail serves to promote the name of the publishing house with no reasonable expectation of sales revenues.
The touch command is the easiest way to create new, empty files. It is also used to change the timestamps (i.e., dates and times of the most recent access and modification) on existing files and directories. touch's syntax is. touch [option] file_name(s)
The alternative to the using the Linux command line is to use the source() function inside of R. The source function will also call a script, but you have to be inside an R session to use it. Here are a few external references to the RScript and R CMD BATCH commands: RScript man page. Run R script from command line. Running R batch mode on Linux.