Changing permissions with chmod
Suppose that you've been working on a file called rowyourboat and you want to have your coworkers down the stream review it. To do so, you'll need to give other people permission to access the document. You can either give people in specific groups access, or you can give everybody on the UNIX system access. In particular, you can specify permissions for u(ser—that's you), g(roup), o(thers), and a(ll).
In addition to specifying permissions, you can also specify how much access a person or group can have to your file. For example, you can specify r(ead), w(rite), and (e)x(ecute) access, depending on how much you trust them not to ruin your rowyourboat masterpiece.
As shown in Code Listing 5.7, your first step is ...
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