LS - Al meaning of each field

ls -al Instructions that most people should have used , But not many people know the meaning of each paragraph in detail . Knowing why and why can better help us use the terminal .

Nine fields ：

1. File property field
   There are... In total for file property fields 10 Letter composition , The first letter indicates the file type , If this letter is a minus sign ”-”, It means that the file is a normal file . Letter ”d” Indicates that the file is a directory , Letter ”d”, yes dirtectory( Catalog ) Abbreviation .
   Please note that , A directory or folder is a special file , This special file holds information about other files and folders .
2. Number of file hard links or directory subdirectories
3. File owner
4. The group of file owners
5. File file size ( In bytes )
6. File creation month
7. File creation date
8. File creation time
9. file name ( If it's a symbolic link , Then there will be a “->” The arrow symbol , And then there's a file it points to )

The first field is detailed ：

With linux drwxr-xr-x For example ：

• The first 1 Bit for file type .d It's a catalog file ,l It's a linked file ,- It's an ordinary document ,p It's a pipe .
• The first 2-4 Bit indicates the permission of the owner of the file ,r Yes. ,w Yes. ,x Is to perform .
• The first 5-7 Bit indicates the permissions of users in the same group as the file owner .
• The first 8-10 Bit indicates the permissions of other users .

author ： Little code boy
link ：https://www.jianshu.com/p/21304e810331
source ： Simple books
The copyright belongs to the author . Commercial reprint please contact the author for authorization , Non-commercial reprint please indicate the source .