Folder Overview under the Linux root directory

/root directory
/bin storing the necessary commands
/boot Store the kernel and the files required for startup
/dev Store device files
/etc Store the configuration file of the system
Home directory for user files, where user data resides in their home directory
/lib storing the necessary runtime libraries
/MNT The temporary mapping file system, we often mount the floppy drive and CD-ROM in the floppy and CDROM subdirectories here.
/proc storing stored process and system Information
/root home directory for super users
/sbin Storage System Management Program
/tmp directory where temporary files are stored
/usr contains applications that do not normally need to be modified, command program files, libraries, manuals, and other documents.
/var contains frequently changing files generated by the system

Folder Overview under the Linux root directory