Most Unix-like systems like CentOS for example are folowing the FHS Standart (File System Hierarchy Standart). FHS describes permissions, filename and locations.
| Directory | Description |
| / | Root, Highest level in File system Hierarchy |
| /bin | Command Binaries (grep, bash, shell, etc) |
| /boot | Boot loader, linux kernel |
| /dev | System devices (disks, optical drives, etc.) |
| /etc | System configuration files |
| /home | User/Users home directories |
| /lib | System libraries |
| /media | Removable media |
| /opt | Software packages (often used for third-party packages) |
| /proc | This directory contains system information |
| /run | Process information |
| /sbin | System binaries |
| /sys | System Information |
| /tmp | Temporary Files |
| /usr | This directory provides another place for applications to live |
| /var | Contains logs and other data that changes over time |
