11THE ENVIRONMENT
As we discussed earlier, the shell maintains a body of information during our shell session called the environment. Programs use the data stored in the environment to determine facts about the system’s configuration. While most programs use configuration files to store
program settings, some programs also look for values stored in the environment to adjust their behavior. Knowing this, we can use the environment to customize our shell experience.
In this chapter, we will work with the following commands:
printenv Print part or all of the environment
set Set shell options
export Export environment to subsequently executed programs ...
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