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Example person
Asked: 2021-03-05 22:37:08 +0800 CST

My ubuntu default permissions suddenly changed from 644 to 664?

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My ubuntu default permissions suddenly changed from 644 to 664?

Usually, I am familiar with the permissions 644 and 755 for files and directories respectively.

But now when I create a new dir or a new file, the permissions are 664 and 775.

Is 664 and 775 the default permissions actually? But, I haven't noticed them before because I do not really look at file permissions every day.

Even folders created with nautilus do this. And, as there is no button to create a file in nautilus, I use the command line, and I am pretty familiar with the terminal.

I am using Ubuntu 20.10 Minimal Desktop version.

Now this is what happens:

$ ls -la
total 8
drwxrwxr-x 2 exampleuser exampleuser 4096 Mar  5 12:22 .
drwxr-xr-x 6 exampleuser exampleuser 4096 Mar  5 12:23 ..
$ mkdir example
$ ls -la
total 12
drwxrwxr-x 3 exampleuser exampleuser 4096 Mar  5 12:25 .
drwxr-xr-x 6 exampleuser exampleuser 4096 Mar  5 12:23 ..
drwxrwxr-x 2 exampleuser exampleuser 4096 Mar  5 12:25 example
20.10

1 Answers

  1. Best Answer

    This depends on the default umask which is different for normal users and the root user.

    Check the umask for normal user:

    $ umask
0002

    which results in 775 for directories and 664 for files.

    For the root user:

    $ sudo su
# umask
0022

    which results in 755 for directories and 644 for files.

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