Linux file Permissions rwx representative meaning

-rwxr-xr-x 1 root root 1904 Apr startup.sh

The first character,
-Represents file D for folder L for: Soft connection file (similar to a shortcut under Windows)

From the second character, each character represents a permission,
In turn (read r=4) (write w=2) (run x=1), each three characters represents a class of users

RWX: Indicates that the file owner (root) has read and write run permissions
R-x: Indicates that other users of the same group (root) have read run permissions, no Modify permissions
R-x: Indicates that another user group user has read run permission, no modify permission

-rwxrwxrwx 1 bu users 2254 2006-05-20 13:47 tt.htm

RWX: The file owner (BU) has access to read and write operations;
RWX: File owner same group (users) other people have read and write operation permissions;
RWX: Users of other user groups have access to read and write operations;

1:
Bu: File owner
Users: The user group where the file owner resides
2254: File Size
2006-05-20 13:47: Last Modification time
Tt.htm: File name

Linux file Permissions rwx representative meaning