Final answer:
To check environment variables in Linux, use the 'printenv' command to list all or specific variables, or 'echo $VARIABLE_NAME' to check a specific variable.
Step-by-step explanation:
To check environment variables in Linux, you can use several commands in the terminal. The most common command is, which prints all environment variables when used without arguments. To view a specific environment variable, you can use, VARIABLE_NAME as the name of the variable you wish to examine. Another useful command is env, which also lists all environment variables.
Example:
- printenv PATH will display the PATH environment variable.
- echo $HOME will display the value of the HOME environment variable.