Online documentation man command prints a writeup from the UNIX Programmer's Manual for the specified command. For example, try man -k editor . Use the on-screen menus to navigate. Type ls -l for a long list showing ownership, file size, and date modified. There are now two separate copies of the file.
Some people capitalizes directory names so they stand out among the file names.
The directory must be empty. See the printing handout for information on site codes, locations, and costs. For example, try look dict . A common common typo. History history lists your most recent commands.