Here is a list of directories in a Linux system and their use.
1./ The root of the virtual directory,usually empty.
2./bin The binary directory, where many GNU user-level utilities are stored.
3./boot The boot directory, where boot files are stored.
4./dev The device directory.
5./etc The system configuration files directory.
6./home The home directory, where user created directories are created.
7./lib The library directory, where system and application library files are stored.
8./media The media directory, default mount points used by removable media.
9./mnt The mount directory, where removable storage devices like USB are mounted.
10/opt The optional directory, where optional software packages in linux distributions are installed.
11./root The root home directory.
12./sbin The system binary directory, where many GNU admin-level utilities are stored.
13./tmp The temporary directory, like the Temp in windows.
14./usr The user-installed software directory.
15./var The variable directory, used to store temporary files.
