Linux 101: What are environment variables? Your email has been sent Jack Wallen introduces you to Linux environment variables. What are they and how are they set and ...

I've added some environment variables to /etc/profile and /etc/bashrc, but when I run commands with sudo, they're not there— sudo env does not list them. Is there some other profile I should be ...

Variables often look like $var, but they also look like $1, $*, $? and $$. Let's take a look at what all these $ values can tell you. A lot of important values are ...