View and modify file permissions under Linux

View Permissions

[Ruby]View PlainCopy 

1. In Terminal input:
2. Ls-l xxx.xxx (xxx.xxx is the file name)
3. Then there will be similar messages, mostly these:
4. -rw-rw-r--

[Ruby]View PlainCopy 

1. Which: the front one-represents the type
2. The middle three rw-represents the owner (user)
3. Then those three rw-represent groups (group)
4. The last three r--represent others (other).
6. And then I'll explain the 9 digits in the back:
7. R indicates that a file can be read (read)
8. W indicates that the file can be written (write)
9. x indicates that the file can be executed (if it is a program)
10. -Indicates that the appropriate permission has not been granted

Modify Permissions

[Ruby]View PlainCopy 

1. In Terminal input:
2. chmod o+w xxx.xxx
3. Give other people permission to write xxx.xxx this file
5. chmod GO-RW xxx.xxx
6. Represents the deletion of read and write permissions for groups and others in xxx.xxx

[Ruby]View PlainCopy  

1. U on behalf of owner (user)
2. G represents the group where the owner resides
3. O stands for others, but not u and g (other).
4. A represents all people, including U,g and O.
6. R indicates that a file can be read (read)
7. W indicates that the file can be written (write)
8. x indicates that the file can be executed (if it is a program)

Numbers instead

[Ruby]View PlainCopy  

1. Where: Rwx can also be replaced by numbers
2. R------------4
3. W-----------2
4. X------------1
5. -------------0
7. Let's go:
8. + means add permission
9. -Indicates delete permission
10. = indicates a permission to make it unique

[Ruby]View PlainCopy  

1. -RW-------(600) Only the owner has read and write permissions
2. -rw-r--r--(644) Only the owner has read and write permissions, and the group and other people only have Read permissions
3. -RWX------(700) Only the owner has read, write, execute permissions
4. -rwxr-xr-x (755) Only the owner has read, write, execute permissions, groups and other people only read and Execute permissions
5. -rwx--x--x (711) Only the owner has read, write, execute permissions, groups and other people only execute the permissions
6. -rw-rw-rw-(666) Everyone has access to read and write
7. -RWXRWXRWX (777) Everyone has access to read and write and execute

[HTML]View PlainCopy 

1. When executing Mkdir/nfs in the script, I found that I had already created the/nfs directory, so I got an error, and then I stuck there and asked for a solution:
3. Mkdir-p/nfs
5. That is, by adding the-p parameter, you only know that the directory was created recursively

View and modify file permissions under Linux