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SUMMARY
This article lists and describes the OpenSTLinux file-system hierarchy (Weston and core).
1. Introduction[edit source]
Linux® is a file-oriented operating system. This means that any application, library, or other information related, for example, to configurations and running applications is stored in files only.
The Template:Highlight defines the directory structure and directory contents in Linux distributions.
It is maintained by the Linux Foundation. Template:Highlight
The main parts described by the FHS are:
- the physical filesystem: any mass storage devices (NAND/eMMC/... partitions, USB key partitions, and so on)
- pseudo filesystem: created dynamically at boot-up (and/or at runtime) to store various information and configurations related to the software being run
- remote filesystem: rootfs can contain links to a network filesystem
OpenSTLinux images respect the latest FHS definition: 3.0
2. Root filesystem content[edit source]
- The filesystem root of any Linux Distribution (OpenSTLinux included) is named '/' or 'root' (do not confuse with the 'root' super user name).
There are no files in the root path, only directories that shape the Linux FHS, as listed below:
| bin/ | Essential command binaries |
| boot/ | Static boot loader files |
| dev/ | Device files (temporary filessytem devtmpfs) |
| etc/ | Host-specific system configuration |
| lib/ | Essential shared libraries and kernel modules |
| media/ | Mount point for removable media |
| mnt/ | Mount point for temporarily mounting a filesystem |
| proc/ | Kernel and process information (pseudo filesystem procfs) |
| opt/ | Add-on application software packages |
| run/ | Data relevant to running processes |
| sbin/ | Essential system binaries |
| sys/ | Kernel and system information (pseudo filesystem sysfs)) |
| srv/ | Data for system-provided services |
| tmp/ | Temporary files |
| usr/ | Secondary filesystem-hierarchy |
| var/ | Variable data |
- As a standard Linux distribution, the OpenSTLinux distribution includes the optional user directories:
| /home | User home directories (optional) |
| /root | Home directory for the root user (optional) |
Details of the directory purpose, content or sub-hierarchy can be found in the official documentation: FHS-3.0
- OpenSTLinux also integrates a vendorfs filesystem, mounted on a dedicated Flash-memory partition (that is, /dev/mmcblk0p5):
| /vendor | Vendor dedicated directory |
This directory allows the storage of specific vendor libraries.