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)
UNIX commands are strings of characters typed in at the keyboard. To run a command, you just type it in at the keyboard and press the ENTER key. We will look at several of the most common commands below. UNIX extends the power of commands by using special flags or switches.