Linux Series: Shell script programming

File system

1. File system partition structure is divided into Inode group and data domain

The 2.linux file is divided into directories and binary files

3. Catalog items are stored in the directory, and the directory entry records the file name and IndexID, each indexid corresponds to a meta-data structure in the Inode group.

4. The metadata structure contains the permissions, type, size, pointers and other data, through the pointer can find the location of the binary file

Ls:list File Information

Ls

-A lists all files

-L Detailed information

-I list IndexID

Diff:different differences of two files

Diff Test.java Testcopy.java

If there is no output that indicates that two files are consistent in content

Cp:copy

Copy location/file name Location---copying files

Copy share/share2-r---Iteration replication directory

Rm:remove

RM location/File name---Delete file

RM location/-R---iteration delete

Note that, in fact, the deletion does not clear the binaries, only the directory entries in the directory are deleted, and the Inode group is marked as idle in the particular ID.

Mv:move | Rename

MV Location/File location---moving files

MV File New FileName---Rename

Aided

Alias L = ' ls-l '---aliases

Linux Series: Shell script programming