You can use the echo command to display the value of an environment variable. ... This displays the value of the environment variable PATH. ... The $ sign is a shell metacharacter that uses the value of the variable instead of its name. ... For the Bourne shell use the command set to display the value of environment variables. For the C and TC shell use the command printenv or env to display the value of environment variables and the command set to display the value of local shell variables. ...