I have created a user called paul using the following command:

sudo adduser paul 

adduser also created a new group called paul and made it the primary group for the user paul.

I have created a file using the paul user, and displayed its information using ls-l:

-rw-r--r-- 1 paul paul 25 2017-05-14 15:30 1.txt

Then I have deleted the paul user using the following command:

sudo userdel paul 

And then I have displayed the previously created file's information using ls -l:

-rw-r--r-- 1 1001 1001 25 2017-05-14 15:30 1.txt

The paul user has been replaced by its ID (which is 1001) since I have just deleted this user. But why the group ID is also displayed instead of the group name, was the group also deleted?

I have created a user called paul using the following command:

sudo adduser paul 

adduser also created a new group called paul and made it the primary group for the user paul.

I have created a file using the paul user, and displayed its information using ls-l:

-rw-r--r-- 1 paul paul 25 2017-05-14 15:30 1.txt 

Then I have deleted the paul user using the following command:

sudo userdel paul 

And then I have displayed the previously created file's information using ls -l:

-rw-r--r-- 1 1001 1001 25 2017-05-14 15:30 1.txt 

The paul user has been replaced by its ID (which is 1001) since I have just deleted this user. But why the group ID is also displayed instead of the group name, was the group also deleted?