advanced attribute(immutable flag)-عدم ویرایش و حذف و انتقال

$ touch 970107.txt
$ lsattr 970107.txt

--------------e---- 970107.txt

$ echo salam >> /tmp/970107.txt
$ cat  /tmp/970107.txt

salam

$ sudo chattr +i /tmp/970107.txt
$ lsattr 970107.txt

----i---------e---- 970107.txt

$ echo salam2 >> /tmp/970107.txt

bash: /tmp/970107.txt: Operation not permitted

$ sudo rm -rf  /tmp/970107.txt

rm: cannot remove '/tmp/970107.txt': Operation not permitted

$ sudo mv   /tmp/970107.txt  ~

mv: cannot move '/tmp/970107.txt' to '/home/behrooz/970107.txt': Operation not permitted

$ sudo chattr -i /tmp/970107.txt
$ lsattr /tmp/970107.txt

--------------e---- /tmp/970107.txt