Suppose you were in vi editing the source code to a particular program, but couldn't remember how to do something, so you wanted to look at the code for a previous program you had written. The bg command tells the most recently suspended process to start running in the background. See the above example for suspending and resuming the vi editor, under the ctrl z heading. The history command lists the last few things that you did on the computer. Even with all the graphics contained in web sites today, it still comes in handy if you're in a hurry and don't want to wait for graphics to load.
Lynx has online help built into it.
We have created a very simple sample program for you to play with. Either copy and paste it into a new file, or you can retrieve the file itself from my account. It is still used today as a convenient method for placing the contents of a directory in one file and then using gzip to compress it. The chmod utility is used for changing the permissions on files and directories in your unix account. More will be added later.