Linux File System Directories

root is the beginning or the top point of the Unix File System under which directories important to a Unix OS reside. It is different from a root user of the system.
Each directory contains set of files and programs which are required for the proper functioning of the OS.
Out of all the directories, /home/ and /opt/ are two important directories for this eYRC Theme.
/opt/ is the directory or folder where the packages or software which you are going to install using package manager (apt-get in Ubuntu) is going to reside.
/home/ is the folder where all your personal files, including project files, are going to reside.
/bin/ is the folder where most common Linux commands reside. Commands like ls, chmod etc.