another point: I think you tried it in shell as a root but in browser it can't execute it as a root again I agree with Shawn it is from permission try the command that I told you I mean edit the command and then run it in browser
another point: I think you tried it in shell as a root but in browser it can't execute it as a root again I agree with Shawn it is from permission try the command that I told you I mean edit the command and then run it in browser