Function to prepend to environment variables

- [Narrator] Function to prepend to environment variables.…In the previous video, we've learned how to play…with variables and environment variables.…In this video, we're going to see how to learn to use…a list of paths of where to search…for executables, libraries and so on.…Examples are $PATH, $LD_LIBRARY_PATH,…which will typically look like this.…This essentially means that whenever the shell…has to execute binaries, it'll first…look into /usr/bin followed by /bin.…

A very common task that one has to do when building…a program from source and installing to a custom path is…to add its bin directory to the path environment variable.…Let's say in this case we install My App to /opt/myapp,…which has binaries in a directory called "bin"…and libraries in lib.…Let's see how to do it.…A way to do this is to say it as ...…Now, PATH and LD_LIBRARY_PATH…should now look something like this.…

However, we can make this easier by adding…this function, .bashrc.…This can be used in the ways it's showing on the screen.…Now we'll see how this function works.…