Unix basic tutorial 5 File system

1. File system: divided according to a certain structure

1) Boot Block | Super Block | inode table | data

Boot block: the bootstrap reads and loads the operating system when powered on

Super block: stores the title information of the file system: file system size, inode table size, data area usage

Inode table: each table entry stores the static information of a file: size, type, owner, index table, access rights, modification date

Data: access by block

2) Establishment of file system

# mkfs specialfile blocksize gap blocks

Specialfile: logical device number

Blocksize: the size of the file system block, usually 512

Gap: interval factor, small: fast, fragmented

Block: the size of the file system. (number of blocks)

3) installation and removal of file system

Mount specialfile directoryname

# mount / dev/hd03 / mnt

# umount / dev/hd03 or # umount / mnt

4) logical structure of file system