Understand the role of each directory
Bin binary File
Boot file, kernel of boot system
Dev device files
ETC configuration file
Home Directory for home users
LIB link library file
Lost+found
Mount Mount point
MNT mount point (manual mount point)
Net
Opt source package installation software, usually manually installed under the folder (if not named, generally installed under the usr/local directory)
Proc Kernel parameters (no actual files, all virtual files, no disk size)
Root system administrator's home directory
Sbin binary files (files that the system administrator can execute)
Temp file stored by TMP
Address of the USR software default installation
var days, caches, database files (emphasis)
Understanding relative paths and absolute paths
Cd/mnt/hgfs/dsk Absolute path: From the root directory is the absolute path:
Cd.. /.. /.. /dev/shm/ relative path: ".", ".." is the relative path
Linux Learning Three: The structure of the folder system and the relative (absolute) path