1. Week 3
The File System

2. ž 6.0 Intro
ž 6.1 Pathnames
ž 6.2 Mounting and unmounting
ž 6.3 Organisation

4. In Unix, anything that exists,
including nothing,
is in the file system

5. Of course, there are files and
directories. But there are
also representations of all
sorts of objects.

6. Namespace API
filesystem
Security model Implementation

7. A Linux/Unix kernel may
support several filesystem
implementations:
• Ext3
• Ext4
• ZFS
• VxFS
• ReiserFS
• JFS
• Btrfs
• etc

9. Everything starts at /.
The root.

10. /tmp/foo is an absolute pathname.
tmp/food is a relative pathname.

11. Spaces are ok.
Just use “ or to preserve
spaces.

13. mount /dev/sda4 /users
unmount -l /users

15. No single structure or
naming conventions, great
variety between Linux and
Unix distributions.

16. /bin Core OS commands
/boot Kernel and files for
booting
/dev Devices
/etc Startup and configuration
/home User home directories
/lib Libraries, shared libraries,
C compiler