These commands all allow the user to do file operations on files in ROS packages.
rosed allows for editing a file in a ROS package from any location.
rosed <PACKAGE> <FILE>
roscat allows for files in a ROS package to be echoed to the screen from any location.
roscat <PACKAGE> <FILE>
roscd allows for the user to cd directly to any folder in a ROS package.
roscp allows for the user to copy a file from a ROS package to any directory.
roscp <PACKAGE> <FILE> <TARGET>
rosls allows a user to see files in a package.