The following exercise shows you how to open a file, enter text, and then save the changes to the file.
Step #1 At the command line, type "vi doc1". Step #2 Type the letter "i". This puts you into insert mode. Step #3 Enter the following text into your document: This is my first vi document. This is the second line of the document. Step #4 Hit the "<Esc>" key. This takes you back into command mode. Step #5 Now enter ":wq" to save the changes to the file. This stands for "write and quit". You are returned to the UNIX command line.