sed permission denied when overwriting file

Question

I am trying to use sed to overwrite my index.php file, but I am getting an error:

$ sed -i \'s@@

        

Answer 1

check for the /tmp folder permission It should have the following permission

drwxrwxrwt   7 root root 4.0K Nov 16 15:06 tmp

If it is not ok for you then run the following commands

sudo chown root:root /tmp
sudo chmod 1777 /tmp

once this is done, then put a sudo infront of your sed command to execute the command as a root user.

This will solve the issue