Linux FileSysten Manipulation

Question

I am trying to change the file attributes of my txt file on Linux
I want to make the file read only!

"sudo chown root:root filename.txt"
"sudo chmod 444 filename.txt"

and it's perfectly working on my Linux !

but when I shared the file to the android mobile, file permissions are changing automatically!

from where my file is getting permission of 'w' writing?

how to prevent that ?

I want my file as read only even if i share it with others.

Answer 1

Well leme explain in layman terms....

consider its possible to create a read-only file that works as read only throughout every os (all other computers)... now that would cause a really big issue (say you create a virus and made it read only now suddenly no one would be able to delete it 😆)

There's common myth that read only files would work across any os / any pc which is not possible .. it will be read-only only on your pc ... hope u got it
「ＨＡＰＰＹ ＴＯ ＨＥＬＰ」 and Martin Taylor explained this very well in lil indepth